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Yesterday I learned with great sadness that Donald (Red) Dellinger had passed away.

He pretty much touched everyone in some way in this country in the Citroen community. I would not have gotten involved with Citroen myself  was it not for Red. I purchased my very first Citroen from him; a 1972 DS21 Pallas, and in the glove-box of this very car was a copy of Red’s most famous work: The Adjustment of the Citromatic Transmission.

This article has appeared in a few publications over the years, but I have chosen the version that appeared in the Citroen Club of Ohio Newsletter Sept./Oct. 1984 issue. It will appear in the following post, so be sure to check it out. There is a short introduction by: Don James, who was the editor at the time.

Of all the information written over the years about the Citroen D Model this one has to rank as a Milestone of the all time greats.  Red puts down in four very simple steps how to properly adjust this very unique and often misunderstood transmission. To this day it is the method that most people use to adjust the Citromatic transmission.

Red, I know that somewhere you are conducting court with a large group of Citroenthusiasts around you. They are listening to your every word, and taking notes. Few people in this country knew the cars as well as you, and you will be sorely missed! Take care!              

7.17 CITROMATIC - OPERATION AND ADJUSTMENT

INTRODUCTION

Don James, OH (840912)

The series of articles by Don (Red) Dellinger to follow will help you put your Citromatic back in adjustment, no matter how screwed up some previous owner has made it.

Follow the instructions step by step. Please remember one thing—check the simple things first. If your Citromatic sounds like it has marbles in it, bleed the centrifugal regulator at the bleed screws provided at the top. The Citromatic will not work correctly if there is air in the brakes, so bleed at the carburetor, too.

If the gears grind, check to be sure that the clutch release lever is moving forward far enough. If it is, and the gears still grind, there is obviously something wrong with the clutch and pressure plate—not the Citromatic! The gears would grind, even with a standard shift. As with most of the problems that owners have with their Citroens, 99% of the problems that develop, come from simple, and avoidable causes.

The single biggest problem with Citroens is caused by mechanics working on the car when they do not understand how it works! They never fail to put the entire car out of adjustment and cause more damage than years of normal wear could cause.

An automatic transmission that gets the same fuel mileage as a standard shift has been the dream of many auto makers for years. The trick is to eliminate the clutch, but retain a direct drive with no slippage. This was invented years ago by Citroen. The transmission was not a fully automatic, but could have been if they had wanted it.

It is what we now call an automatic stickshift or semiautomatic transmission. Citroen called it “CITROMATIC”, and it is more wondrous than their famous hydro-pneumatic suspension.

7.18 CITROMATIC - OPERATION AND ADJUSTMENT PART 1 - PRINCIPLES AND ADVANTAGES

Donald (Red) Dellinger, PA (840912)

Many people get confused about Citromatic equipped cars especially if they have never had any previous experience with this type of shift. Most owners who have driven them for years do not understand the workings of this hydraulic marvel. When I think of it, it must be as close and effortless as you can get to a fully automatic transmission without the undesirable aspects of the fully automatic transmission such as loss of power, loss of control, flexibility, economy, etc.

The Citromatic is quick, positive, safe, economical and effortless IF all units are working and are adjusted properly. No four speed shifts faster or more accurately than a DS with Citromatic. No declutching manually, no wait for synchronization, no foot slipping from clutch pedal, no clutch slip (riding clutch), no left leg cramps in traffic, quick shift from 4th to 3rd are just a few of this transmission’s good points.

One of the transmission’s great points is ease of shifting even in hard cornering when extra power is needed. In a normal 4-speed equipped car you must remove one hand from the steering wheel, declutch with the left foot, move gear lever with right hand, release accelerator, etc. Valuable time is lost in these motions! The control of the car may be lost by split second timing in an emergency corner- ing situation.

Citromatic is instantaneous and when adjusted properly the shifting is precise. Most people are not patient enough to take time to understand Citromatic. Most mechanics do not understand it, therefore cannot adjust it properly. Most Citromatic clutches are so improperly adjusted that they have overheated and warped which causes clutch chatter and gives erratic operation.

Once all of the components of the Citromatic are adjusted properly the only slippage the driver will get is if the car is started off in a gear higher than it should be (2nd or 3rd when it should be in 1st). Have you ever observed the shift pattern closely? Typical Citroen engineering!

The transmission must be in neutral to start for safety (the shift block can only be in neutral or the starter will not turn). 1st and reverse are directly across from each other, this is for ease of parking (minimum movement of the lever). A properly adjusted DS will idle into a parallel spot just by touching the brake pedal and shifting from 1st to reverse to 1st again.

By the way, the brake pedal on a DS is to be operated by the right foot only—no left foot on brake and right foot on accelerator like an american auto - this will defeat all adjustments. The champignon or mushroom foot brake rubber sphere is designed for a minimum travel its entire life and is lower than the accelerator pedal for a special reason—quick reaction time from the accelerator to the brake with the right foot, your foot only has to pivot on the heel to depress the brake and pivot to the right for the accelerator. If this is not so in any Citroen D-model the accelerator linkage needs adjustment.

This is all leading to proper driving of the DS Citromatic. When all the adjustments are carried out properly to the driver’s satisfaction, from this time on, normal maintenance should be a clutch adjustment every 10,000 miles (5,000 miles if the car is used primarily for stop and go driving).

EXCEPTION: when any of the components in this circuit are replaced, then adjustment of that component is necessary. The transmission, differential, clutch pressure plate, clutch disc, and release bearing are identical to the manual shift cars except for the internal shift rods and forks and the operation of the clutch. Instead of a mechanical clutch cable and rod there is a clutch slave cylinder and fitted to the transmission top covers are five servos or pistons (one each for 1st, 2nd, 3rd, 4th and reverse).

Lines leading from the hydraulic gear selector (shift block) to the transmission connect to these servos and are tied together in one bundle. Like any hydraulic clutch slave cylinder, it has one function - to engage or release pressure on the clutch release fork to operate the clutch mechanism. This lengthy description is necessary because the manually shifted car clutch free travel is also adjusted here by feel of distance or clearance, which can be checked quickly with finger and thumb, but NOT the Citromatic.

The Citromatic clutch is adjusted so that at 750-800 rpm the clutch components are just about ready to contact each other—disc, pressure plate, and flywheel. Putting it more simply, the clutch release or throw-out bearing is depressing the fingers on the pressure plate to the point where the clutch is just about to engage slightly but is still disengaged.

For comparison on a manual shift car, the point reached when you are in 1st gear and have eased out on the clutch pedal to where another 1/8” would cause the car to start to creep away on the level. Manual shift and Citromatic clutches are adjusted differently. The manual clutch is adjusted without the engine running and the clutch pedal out (clutch engaged position) by pressing with your right thumb against the adjusting bracket (clutch fork) toward the radiator. There should be approximately 6mm clearance or play. Turning the adjusting screw clockwise reduces the clearance, counter-clockwise increases it. That’s it for the manual shift car owners, but for you poor buggers with Citromatic, let me continue as we are going to the meat and potatoes of it.

7.19 CITROMATIC - OPERATION AND ADJUSTMENT PART 2 - CLUTCH ADJUSTMENT

Donald (Red) Dellinger, PA (840913)

Start engine and bring to normal temperature. If the front of your car has been wrecked and the crank extension will not fit through the air duct without binding you must either remove the duct or make a tool from 1/4” or 5/16” rod (obtained from a hardware store) and weld about 2” 14 mm or 9/16” allen key to the 3 foot long rod. We use an old army surplus rifle cleaning rod that has a “T” handle that revolves.

This must take the place of the crank extension piece and is inserted in the front of the transmission and must be pushed in approximately 1”. This makes contact with the transmission main or clutch shaft which passes through the clutch disc and is supported by the pilot bearing in the flywheel. Now, back to the adjustment procedure: engine at normal operating temperature; turn the large air screw (brass) located at the front bottom left of the carburetor clockwise until seated and slightly tight, this should slow engine speed; check and adjust engine idle and mixture screws to obtain a smooth idle of
750-800 rpm (check with tach); Since the clutch disc is connected to the transmission main shaft and our crank dog is pushed in this is the speed the engine will be idling at when you stop for any reason in driving—so at this speed we want the clutch disengaged (primary idle). Since the clutch disk is connected to the transmission main shaft and our crank dog is pushed in with the crank or our home-made tool; by changing the adjustment we can adjust the DS clutch properly. Turn the adjustment bolt counter-clockwise with the engine running (WARNING: watch fingers in moving pieces—belts, fan, etc.) until the tool (or crank extension) starts to rotate, this will mean that the clutch is starting to engage. Then turn the adjustment bolt clockwise until the tool just stops turning (clutch just disengaged) then continue to turn the bolt one full turn clockwise. You are now finished with the clutch adjustment.

Note: If the shaft will not stop turning even after turning in the adjustment bolt all the way, then the pressure plate is broken and a new clutch is necessary. This is a fairly common occurrence even with manual shift on high mileage cars. If you try to adjust any other components of the system and you have a faulty pressure plate or clutch you will not be successful at all.

7.20 CITROMATIC - OPERATION AND ADJUSTMENT PART 3 - ENGINE IDLE

Donald (Red) Dellinger, PA (840914)

The next step (providing the clutch adjustment was successful and the clutch/pressure plate mechanism is working properly) is to adjust the engine idle. I prefer 1000 rpm secondary idle. To adjust unscrew the large brass screw you previously screwed in back out (counter-clockwise) to obtain 1000 rpm. Now, step on the foot brake and the engine speed should drop to 750-800 rpm (primary idle). When you let go of the brake the engine idle should rise to 1000 rpm (secondary idle). You are now finished adjusting idle.

Note: Remember 1000 rpm minus 750 rpm equals 250 rpm (for future reference).

7.21 CITROMATIC - OPERATION AND ADJUSTMENT PART 4 - CENTRIFUGAL REGULATOR

Donald (Red) Dellinger, PA (840915)

Fig. 67 Sectional View of the Centrifugal Regulator Key: 1-Front bearing; 2-Bearing end plate; 3-Governor mechanism; 4- Assembling screws; 5-Regulator; 6-Dashpot; 7-Bleed screws; 8-Clutch disengagement corrector body; 9-Seal; 10-Rear plate; 11-Nuts; 12-Spring; 13-Piston; 14-Circlips; 15-Rod; 16-Spring; 17-Cup; 18-Seat; 19-Slide valve; 20-Support; 21-Pad; 22-Sleeve; 23-Pulley; 24-Adjusting screw.

The next unit we will adjust will be the centrifugal regulator, located above the high pressure pump and driven by a small belt from the pump. This belt must not be over tightened or the result will be premature bearing failure in the centrifugal regulator.

The centrifugal regulator has one purpose only. That is to start discharging fluid from the clutch slave cylinder between 800 to 1000 rpm of the engine (a very slight amount). When the engine speed increases from primary to secondary idle speed, just enough fluid is released from the clutch slave cylinder to make the clutch start to engage. When the clutch starts to engage just slightly the car starts to “creep” or move slightly in first or in reverse. Therefore the operation of the regulator is as follows.

When in first or reverse gear and your foot is on the brake pedal the engine is at primary idle and the regulator has clutch disengaged and the car stays still when you remove your foot from the brake pedal the engine speeds up (approximately 250 rpm) to secondary idle which in turn causes the weights in the regulator to signal the clutch to start to engage and the car begins to creep.

It is only normal to have your foot on the brake when stopped at stoplights or signals or for backing up. This is why it is important to use the right foot only for braking—so that the accelerator is released and the primary and secondary idles work properly. If the car will not creep when the foot brake is released in first gear, it will need adjustment. Shut off engine. The adjustment is an 8 mm headed bolt which goes through the center of the centrifugal regulator pulley and is locked in place with an 8 mm nut. Unlock the nut and turn the bolt out (counterclockwise) one turn. Lock the nut, then start engine and check creep again. Continue this adjustment (counter-clockwise to increase creep / clockwise to decrease creep) until the car is set to creep at a speed you are comfortable with. (If the car stalls on selection of first gear, turn the adjustment screw until you achieve the desired creep.)

This is a fine adjustment and should be adjusted in increments of one turn or less at a time. If the car stalls every time on starting out or coming to a stop usually the seals on the piston inside the regulator are swelled and hard, causing the piston to stick in the bore. This is a simple unit and consists of a set of centrifugal weights and springs acting on a sliding piston controlled by the adjusting screw. It’s only purpose is to activate between the difference in speed of primary and secondary idle to release a minute amount of fluid from the clutch slave cylinder.

7.22 CITROMATIC - OPERATION AND ADJUSTMENT PART 5 - GUARANTEE CONTROL

Donald (Red) Dellinger, PA (840915)

Fig. 68 Citromatic Guarantee Control

Fig. 68 shows the Citromatic guarantee control located on the right side of the transmission. Its function is to guarantee the transmission’s gears 1st and 2nd are engaged before the clutch can engage (for safety) by stopping fluid return from the clutch slave cylinder if the gears are not fully engaged. Adjustment procedure is as follows: hydraulic pressure up, engine off, gear selector in neutral, loosen two 11mm headed bolts which hold the control to the transmission, pull the unit toward the front of gearbox, stop and push backwards slowly until the unit snaps rearwards (this is the neutral position), and retighten the bolts. Generally, this unit never gives any trouble and almost never gets out of adjustment. Adjust only if it is removed for repairs.

7.23 CITROMATIC - OPERATION AND ADJUSTMENT PART 6 - CLUTCH RE-ENGAGEMENT CONTROL

Donald (Red) Dellinger, PA (840916)

Fig. 69 Clutch Re-engagement Control Adjustment

This control is attached to the intake manifold in front of the carburetor and is activated by the carburetor primary throttle shaft. Its function is to control how quickly fluid is discharged from the clutch slave cylinder between gear changes (how fast the clutch reengages during the shifting from 1st to 2nd, 2nd to 3rd, and 3rd to 4th). There are two adjustments:

(1) On the side of the unit facing toward the driver’s side of the car, a straight slotted screw protrudes approximately 8 mm, sometimes with a knob fixed by a small screw. The knob has a small raised post allowing it to be turned only 350 degrees, but by unscrewing the small screw it can be turned without stopping on the small peg. If the speed of the clutch re-engagement between gears is too slow turn the screw in (clockwise) until you are satisfied with the clutch re-engagement speed. If the re-engagement of the clutch is too fast unscrew it (counter-clockwise) until it suits you. This screw will not unscrew and fall out and sometimes must be adjusted several turns depending on the condition of the clutch (such as when a new clutch is installed). After getting the adjustment set you can reinstall the small knob with the set screw. Install the knob straight up which will give you approximately 175 degrees of fine adjustment in either direction. The adjuster has a very fine thread, so the adjustment is not too sensitive. Caution: someone may have removed the carburetor and did not fasten the unit on the idle position. As a result the shaft adjustment in relation to the carburetor idle may have been moved.

(2) There is a small hole (usually plugged with a plastic plug) just above and to the rear of the shaft centerline (towards the front of car). This is an adjustment/ alignment hole. Normally with the throttle closed a 2.5 mm (.100”) wire should pass through the hole in the housing and go into the line- up hole in the internal shaft, locking the unit and the throttle shaft tight. If it does it is alright, if not proceed as follows: Grip control unit shaft with thin vice-grip pliers near the body of the control, hold shaft from turning, loosen the 8 mm bolt in clamp between the control and the carburetor shaft, push 2.5 mm (.100”) wire in hole in housing and turning shaft against spring tension until the wire falls into the hole in the shaft and locks the unit from turning, release pliers and align shaft coupling and tighten the 8 mm bolt. After realignment of the control, readjust the unit as No.1 above if necessary (it usually is).

Then on your road test after adjusting the unit drive the car at approximately 55 mph in 4th gear on a level road, move the gear change control to 3rd gear without releasing the accelerator pedal. The shift should be smooth and almost unnoticeable. If not, stop and fine adjust by the knob (or screw if yours no longer has knob on it), road test and readjust to suit your driving style. Total time involved is about 1/2 hour.

7.24 CITROMATIC - OPERATION AND ADJUSTMENT PART 7 - SHIFT BLOCK

Donald (Red) Dellinger, PA (840917)

Fig. 70 Citromatic Shift Block (“The Brain”)

There is only one adjustment on the shift block itself and it very seldom, if ever, needs readjustment unless the shift block is removed from the car. Adjustment procedure is as follows: With left hand reach under and to the rear of the shift block, there you will find a rubber plug with the largest part about 11 mm in diameter. After removing this dust cover you will have access to a 3.94 mm hole. When 1st gear is selected with the control lever a pin 3.94 mm diameter x 50 mm length will slide into the lineup hole approximately 30 mm and lock 1st gear position in the shift box. If not a mirror will allow you to see the hole.

The best method to line up the hole (if it is not already) is to have someone move the control lever to the left/right/in/or out slightly in order to line the hole up in the shift block so that the pin can be inserted. Once you have the pin inserted into the shift block properly then you must adjust the shift control lever to the corresponding 1st gear position. To do this you must first remove a dust cover from the metal cowl to the rear of the shift block (under the hood). This plug is about 1-3/4” in diameter and is made of rubber. It exposes two 8 mm bolts which tighten a clamp between the control lever mechanism and the shift block. To adjust, loosen the lower 8 mm bolt and align the shift control lever to the 1st speed detent (pops into place). Then tighten the lock bolt. Remove the alignment pin and reinstall the dust cover (plugs).

You are finished. This unit is faithful and almost never gives trouble but is often accused as being the cause of trouble. One exception is when it becomes gummed up and stiff (especially in cold weather). Then it must be flushed out or removed and cleaned. A hissing noise from the shift block can be caused by misadjustment or a sticking piston which can be remedied by adjustment or removal and cleaning. Seriously, this unit is like all Citroen hydraulic units and is well engineered and needs little attention. Should service be required never take it apart in place, it is easily removed from the car to be repaired on the bench.

Editor: Before you look for any trouble in this unit, be sure that you check the belt on the centrifugal regulator. The car will not move if the regulator is not turning. Do not overtighten the belt. Should the belt break, the car can be driven by using the manual engagement control that is located under the steering column.

This last weekend was a real treat at the annual Citroen Club of North America meeting, which every year just happens to coincide with the Carlisle Import Kit/Replicar National Car Show. The year’s featured speaker for the club was Kim Walter and was it ever a treat!

Kim is a very accomplished Industrial Art and Design professor at the Pratt Institute in New York. One of Kim’s passions is the wonderful designs of Flaminio Bertoni. Kim gave a very informative talk on several of the designs that Bertoni was responsible for when he worked at Citroen They included the Traction Avant, the Ami 6, the 2CV and the DS. You can find more about Kim on the www.driveshesaid.com website.

For me, working on these beauties, I was always drawn to the cars for their many technical innovations and unique systems. This talk that Kim gave was so refreshing, for he pointed out some of the many lines and esthetic functions of the cars and how Bertoni arrived at them. Some of the lines that he pointed out on the Traction Avant I had never noticed, yet I have owned one for the last 21 years!

Check out some of these beauties… The first is Kim’s own D Model.

Kim Walters’ D Model

Here is a beautiful Ami 6…

Amie

And a sweet little 2CV…

2CV

Check out the curves on this beauty…

Traction

All together 43 Citroens from the East Coast and the Mid West attended the meet, and I personally want to thank club member Brad Nauss, of Brad Nauss Automotive, for once again doing all the behind the scenes work to make this great meet not only happen, but get better each and every year. Here’s a shot of Brad and his Traction.

Brad Nauss and his award winning Traction

This is Paul Vogel’s Citroen D Model. He got best of show with this beauty.

Paul Vogel’s Best of Show D Model

We’ll be adding more pictures soon, so be sure to check back. Thanks to everyone who showed and see you all next year.

Later, Denis

The Citroen C-Metisse…

Here is a very current 6 minute 15 second video on the Concept Citroen C-Metisse. As you can see, just like in the days of the Citroen D Model, Citroen takes a back seat to no other manufacturer when it comes to cutting edge technology.

I WANT ONE.

How about you?

Here is a quick tip when setting the dwell on your Citroen Traction Avant 11B, the 11BL, or the 15/6. It also works on your Citroen D Model, both 3 main and 5 main bearing models. You can use it for the Citroen GS and pre 1982 GSA or the Citroen SM as well. It even works for the Citroen CX. For that matter, it works for any Citroen model that you may have that is equipped with a distributor with points.

This method can also be used on any car, truck, or motorcycle out there that has a distributor with points.

Assuming you have set the timing and the gap on the points it is now time to set the Dwell. Here are the steps to follow:

  • Remove the distributor cap.
  • Remove your spark plugs.
  • Pull the coil wire from your Citroen’s coil.
  • Make sure your Citroen’s transmission is in neutral.

Now connect up your dwell meter. If you have a Citroen D Model you can use the nice little starter relay that is located on the positive post of the battery.

If you are not setting the dwell on a Citroen D Model, then you want to use a remote starter trigger switch that is available at the same auto parts store that you obtained your dwell meter from.

Now we will assume you have a good starter and a fully charged battery.

Get your favorite small, flat blade screwdriver in hand. Flip on your ignition. So with your Citroen’s ignition on, your favorite small flat blade screwdriver on the points adjusting screw in the distributor and the dwell meter turned on, push the relay or starter trigger button and turn the engine over.

As you will notice with the spark plugs removed, the Citroen engine is able to turn over quite quickly with no compression. In fact it will turn over fast enough for you to see what the dwell is and adjust it very quickly.

So hopefully this little tip will let you adjust your Citroen dwell accurately and in a very short amount of time, without having to turn the engine on and off to take your distributor cap on and off.

Best of luck, and please leave your comments and questions.

Several years ago, I wrote an article for our Citroen Club of North America newsletter. It was published on the internet and I decided to let my readers take a peek. If you’re interested in preserving your D Model, it’s well worth the time to keep it rust free. Just click here… Oiling a Citroen “D” Model …to read my article. I will be updating this article in the near future, as I have found a lot of improvements to keep Citroens and all cars rust free. Check back soon.

Over the years, one of the most asked questions I got about Citroens from both customers and the general public was… “How much is it worth?”

My usual quick answer was… “Whatever someone is willing to pay.”

I know this seems like a bit of smart a** answer, but the real answer is not easy.

The Citroen D Model for example…

Take for example the Citroen DS, the car I worked on the most. If you find one for sale, on eBay for example, it might have been spending the last few years of it’s life sitting under a tree.

Hmmm…

The seller thinks he has a work of art. He discribes how it was running several years ago when parked and how it should be just fine, but later in the discription… there appears to be a hydraulic leak and the car no longer goes up and down.

The seller starts the auction off at $7,000.

Let’s get real here!

Then along comes the highly educated professional who buys the above car. His story usually goes that his uncle had one when he himself was very young and he has always wanted to get one.

He wants to know…

Can he fully restore the car and enjoy it a bit then flip it and make a profit?

NO!!!

Now here is a person who you assume has made some good investments and financial decisions during his life, yet he is bringing this car to you and asking this type of question.

His next question is… “What will it cost to fully restore the car”.

This is where you usually make the person very angry by telling them you simply work for “time and materials”, and that to fully restore the car, the owner will probably spend 7 to 10 times what the car will ever be worth.

Now this is where the guy usually walks off in a huff and calls every other Citroen mechanic he can find. But, he ends up calling you a couple of weeks later saying he has done some research and asks… “Hey, would you be interested in buying the car as is?” Don’t ya just love it?

Here’s the REAL scoop on how to buy a nice Citroen…

My usual answer to someone who wants a nicely restored car and wants to get a fair price on it is to take their time. Join all the clubs, go to club events and talk to everybody.

Find a car that someone has for sale, that was fully restored and maintained by a good reputable Citroen mechanic for several years. (And this is important, because that uncle that spent several summers in France and worked on the cars a bit is not the person you want restoring the car.) You also want to see a paper trail on all the work done on the car.

Next, try to find an owner who has finally gotten the word from his wife that… “he should sell the car because she wants that new kitchen that he had promised her before he bought and then restored that Citroen DS.”

Now here is where that person’s loss is your gain. He dosen’t want to sleep on the couch and you get that car for what it is worth… “A fair price”

Don’t forget to leave your comments below and watch for my article on… Rustproofing your Citroen to keep it’s value.

Citroen DS Video…

Here is a wonderful video that was placed on YouTube a few months ago. It is taken from the British television . Here the Citroen DS is discribed in a general, yet telling way, always refering back to it’s 1955 introduction date and just how truely advanced the car was. I hope you like it as much as I do.

Sorry for the tardiness of this entry, but I was ill for a couple of weeks. So here goes:

Now that the tank is in place and you have not caught the tabs on the walls of the tank compartment with the outer flange of the D Model gas tank, it is time to hook things up. Let’s start with the hard one, and that is the fuel pick up line.

This can be tough… Continue Reading »

Ready to put the refurbished tank back in…

Well, the compartment is ready to receive the Citroen fuel tank but, lets take a look at that tank once you got it back from Gas Tank Renu.

As I have told you, they do a great job with renewing the gas tank. There are just a few things I have learned from experience that you want to check over before you put it back in. Continue Reading »

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