Pagoda SL Group
W113 Pagoda SL Group => General Discussion => Topic started by: mauro12 on May 31, 2021, 20:21:07
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Hello guys , I have to replace the fuel cap gasket because mine is totally cracked . I have read that some people prefer rubber rather than cork but I only found corks type .
Also I would like to ask you what is the best way to install it . Put some gasket glue ? Thank you
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Mauro, I bought mine from Mercedes. Do not remember, but seems to me it was rubber...
It should just stay there, fits with some tension.
You may want to check if filler neck is nice and smooth. Also: may want to put some vaseline on the gasket to make it ride smooth on the filler neck, which may feel tight when you put in the new gasket.
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Hi, I see that some website do sell the cork and rubber gasket . Which part goes where ?
I mean , when I remove the cap , which part should I see? Cork or rubber ?
No glue is needed to put the seal?
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There is just one gasket there. Could be earlier it was a piece of cork, now it is rubber. I guess it isa up to you or may want to investigate what 250sl had.
No, no glue, at least I did not use glue. Maybe on earlier filler cups.
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The cork gaskets seem to last longer as the rubber gaskets aren’t ethanol resistant. Cork would also be period correct on a 250sl.
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Thank you guys . The cork side should be seen when you remove the cap , right ? I’m asking for the proper orientation. How can the gasket stay there in place with no glue ?
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I ordered one and a spare a couple of years ago from MB for my 280 SL. I don't recall if I had a part number when I ordered or if ordered by word description with my VIN number. I received cork gaskets. Part number I received was 110-471-02-80.
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I also bought one for 280SL, i think I got rubber. I will check over the weekend, when i get to my car.
I remember the trouble with cork i had was that when it got dry, it started leaking...
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The cork gasket will sit under the two lugs and does not fall off. It pays to put a small amount of lubricant on the side that goes against the fuel pipe from the tank to stop it drying out and sticking too much. Either a bit of white grease or silicone spray will work.
Garry
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Thank you guys . I will try to buy from Mercedes and install .
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..It pays to put a small amount of lubricant on the side that goes against the fuel pipe from the tank to stop it drying out and sticking too much. Either a bit of white grease or silicone spray will work...Garry
Yes, absolutely (and I thought I was the only one that had to do this). I rubbed a dab of grease on the gasket again just last week ;)
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Thank you guys . I will try to buy from Mercedes and install .
If you intend to buy from Mercedes, part number is A 110 471 02 80 for 250SL (it is same for 280SL). neelyrc received cork for it, I do not remember what I received...
It replaced A 110 471 00 80.
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I bought one many years ago that was rubber and my cap was nearly impossible to put on and take off. When I restored my car I bought a new one that was cork and now it fits like it should.
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Thank you Paweł . So the part number is 110 471 0280.
This is the current part number right ? Do you know how much it cost ?
I’m still wondering how is possible that this gasket can stay there in place without any sealant . What is the best way to put it ?
Should i expect some change in the fuel pressure or behavior of the car overall ?
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Mauro,
Since you still are wondering about how the gasket stays in place, maybe you should show us a picture of your cap, the side that interfaces with the fuel inlet.
This is not an issue for the original style caps. Definitely no glue or sealant needed.
Good luck,
Mark
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Mauro, yes, it is the current part number. It costs ca EUR 5 without VAT, so you would have to add whatever VAT is there where you are.
In this thread (link below) you have the picture of the bottom of the gas cap. It is held by two lips, as you see and holds also as it fits tight by seal inner diameter.
https://www.sl113.org/forums/index.php?topic=31034.msg225240#msg225240
As for the performance of the car: it is a non vented cap. If you had one that was tight and your tank evaporation system was working, nothing should happen. If your cap so far was not tight but original and your evaporating system is clogged, there may be issues with fuel supply. If your cap was nor original and vented type cap, nothing will change.
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Guys here I send you some pictures of my gas cap .
The gasket on mine was not sealing properly and the result was sometimes a big stain of petrol in the rear bumper . Maybe was condensation. I’ve never had problems with fuel smell inside the cabin or inside the trunk. Should I be concerned with the sealing of the cap ? This could change something in the fuel supply ? Thank you
My gas cap is the original one . Or maybe was replaced 30 years ago from the previous owner, who knows . Is the key type .
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The seal is completely missing so you could temporarily buy a plain gas cap at a parts store until you receive the new gasket.
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My opinion is that you should put the cork seal in with NO glue. It doesn't need any. If fits well in that depression/circular channel. The cork seal has a rubber type backing. I put that towards the cap so that the cork was touching the fuel inlet. A dab of grease on the fuel inlet or gasket makes it easier to put the cap on the car.
I had trouble with the rubber gasket, it made it very difficult to put the cap on all the way.
You will not know about any fuel supply or running issues until you try it. If it causes a running issue, there is something else wrong. Probably in the fuel ventilation system.
If you don't use the gasket, I would think it would be easy for the cap to fall off.
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What could happen considering that the new seal will avoid the escaping of fuel vapor ? I’ve never had any idea that a seal could create this kind of issues .
Right now the car is driving fine with no issues and I don’t see any fuel in the rear bumper . Considering that my tank is only half full .
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What is the risk to drive the car without gasket in the cap ?
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Splashing petrol around.
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As Pawel said a full tank may splash petrol out but as it is loose it also runs the risk of falling off if it jiggles around. You could cut out an interim gasket from some other material, even a heavy cardboard, if it is only for a few weeks until a new seal arrives.
Garry
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Losing the cap would be a disaster . I will buy a new seal ASAP .
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Losing the cap would be a disaster . I will buy a new seal ASAP .
Mauro,
Fully agree here..... :)
... but NOT with what the other said.
The original cork gasket is just crap. :-X It deteriorates quickly and is prone to losing gas with the relevant spots on your rear bumper half.
Better use a fuel-resistant rubber gasket; there is one with a 140 470 something number (which I have to look up again).
Put a little bit of grease on (I always use MoS2 grease) on the gasket and on the filler neck twice a year - and it will work like a charm.
Never having spots on the bumper anymore, no smell and easy opening and locking. ;)
Achim
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Is this the fuel-resistant rubber gasket? #1404710079
https://www.ebay.com/itm/352527357445
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Yes. I replaced my disintegrating cork seal one with this blue one just after PUB 2017 and like it just fine. It DOES generate more resistance when removing and refitting at fill-up, but the total lack of seepage makes up for it.
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Guys , if you could post an European source for this rubber gasket it would be great . I only found cork. Buying from USA would be very expensive game .
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... but NOT with what the other said.
The original cork gasket is just crap. :-X It deteriorates quickly and is prone to losing gas with the relevant spots on your rear bumper half.
Better use a fuel-resistant rubber gasket; there is one with a 140 470 something number (which I have to look up again).
Put a little bit of grease on (I always use MoS2 grease) on the gasket and on the filler neck twice a year - and it will work like a charm.
Never having spots on the bumper anymore, no smell and easy opening and locking. ;)
Achim
I rarely disagree with Achim, but I do this time.
Maybe the rubber gasket I bought from the Classic Center was out of spec, but it was so thick it was unusable.
Original Cork gasket is what??? Not for me !!! It is perfect. I hope we can discuss this in Chicago, Achim. >:( ;)
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Maybe the trick is to put a thin layer of silicon grease in the cork side . This will prevent the cork from cracking and having too much friction .
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You need some sort of grease on both the cork or the rubber.
No question.
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It seems that there is not a clear view if cork is better than rubber .
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I just looked and I have no idea what I have. Thin and grey. But I recalled that i ordered the whole cap later, with lock to my key number. So it came with this grey gasket. It works perfect.
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It seems that there is not a clear view if cork is better than rubber .
As long as you are still discussing the gasket and are looking for other views, have you done a search?
Here is an old string that is very relevant.
Good luck to you, but if you go with cork, you are going with how it was originally specified. ;D
https://www.sl113.org/forums/index.php?topic=17215.msg118902#msg118902
Enjoy the ride !!
By the way Pawel, if it is grey it might be the rubberized side of the cork. Does this make it more confusing??
Mark
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By the way Pawel, if it is grey it might be the rubberized side of the cork. Does this make it more confusing??
Mark
Yes, it does, thank you. :)
It can be that indeed. Very thin, stuck to the cap.
when I had issues with cork gasket for fuel level sender, I bought the cork sheet and cut it. The cork sheets that are petrol resistant come in all kinds of thicknesses, starting from 1mm if I recall correctly.
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I’m wondering how my gasket disappeared. I left the car to the body shop and by chance I realized that the cap was not closing properly , was very loose. I think my gasket just got disintegrated and probably was the original from 54 years ago . When I receive the new one I will let you know .
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I’m in Achim’s camp. I prefer the blue rubber gasket. It goes on easier, forms a tight seal and to date, I’ve had no issues. The cork one works perfectly when first installed but I did not find it as durable and it is more difficult to put install. The classic center tried to dissuade me from the blue rubber insisting the cork was correct. They’re 100% right, of course, but I still prefer the rubber one. Now that’s my personal opinion... if the cork performs better for your individual use, then go for it. As pointed out by Mark (Iconic), cork IS OEM.
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Why is more difficult to put the cork one? What is the right way to install ?
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Mauro, I think it is mainly a question of lubrication and thickness of the gasket.
Lubrication is, I think, obvious - it is good to lubricate both types.
Thickness: gasket, if too thick, prevents the tags of the cap travel all the way to their lock position. And they should get there before you turn the key, because otherwise the cap may get lose and fall off. These cap tags are traveling on a thread-like edges under the filler neck so that the cap is pressed against the filler neck as you screw it on.
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So I tried the blue rubber gasket and just couldn't figure out why it was impossible to attach the cap to the car. I just assumed that the gasket must be way too thick and ordered the cork one instead.
Today I gave it one last try and realised I was being a dummy. There was an old black (maybe dark grey, per pawel?) gasket embedded in the cap. I guess it had compressed/deteriorated so much that it looked to me like it was just the interior face of the cap itself.
I prised this black one out and put the blue one in its place and it fits great... A little tough to get on first but certainly feels very secure.
I expect this is fairly obvious to most, but figured I would share this in case it had been overlooked by others.
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Probably not as obvious as it seems. Good to lubricate the new one a bit.
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Is this the fuel-resistant rubber gasket? #1404710079
https://www.ebay.com/itm/352527357445
Mauro,
That is the Mercedes dealer parts number: A140 471 0079. It's that easy.
;)
https://classicparts.mercedes-benz.de/dichtring-158689?number=A1404710079
My 2 cents (as are Len's 2 cents): Go for it and leave the original cork in your memorabilia display cabinet.
;) ;D
Achim
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Hi , my cork gasket seems to work pretty well . But which one was the original gasket back in 1967? Cork or rubber ?
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Cork was original, correct?
I don't know why Achim wants rubber, if cork is original.
Looking at at blue rubber gasket (mine was blue from the Classic Center) on the fuel cap looks as out of place to me as the wrong ignition wires, or wrong relays, or wrong ignition resistors, or painted black under hood for non-black car, or polished valve cover, or etc, etc.
Oh well, we can't agree on everything, otherwise we won't have anything to talk about.
I'm using a cork gasket with no negative issues.
Mark
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Agree with Mark, I put a new cork gasket in 8 years ago and it has not given any problems at all.
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There must be good cork and bad cork. I bought two cork ones from Classic Center -- they each lasted about 3 or 4 tankfuls - yes - no exaggeration.
I replaced with Blue and blue one has lasted many many tankfuls. And YES, I lubricated them and continue to lubricate about once a year or so.
Mauro -- compared to almost everything else on the pagoda, these are CHEAP. Buy both and report back to us what you think is best.
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I bought 3 from mb classic.de.
I hope they will last 1or 2 years each .
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Maybe oil/ lubrication is the key to success with a cork seal. i put a blue grease on mine about once a year
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Sorry to help late ,, also i have not been on the forum now for about 9 months, as i decided to sell my
Pagoda back then , and go back to American Buick Cadillac classics that i missed for about 10 years.
To help here ,i have replaced these gas cap seals for years now, its very easy, still have some the gasket cork rubber
combination sheets that i purchased about 20 years ago from pep Boyes, ---should still be able to purchase in US.
no need for cement or glue, like others have said, it comes in 2 thickness. and i have never had to replace this again
after the first time, and i used the thin size, 1/16 inch thick----works perfect.---regards
and no its not as pagoda cap its a Buick.