Gas cap gasket, what to do. |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Gas cap gasket, what to do. |
daytona |
Feb 15 2018, 07:40 PM
Post
#1
|
daytona Group: Members Posts: 435 Joined: 13-April 14 From: Ormond Beach, Florida Member No.: 17,249 Region Association: South East States |
Hi all,
Having a problem with the gas cap on my 74. The gas cap is almost new and in really good shape. However, I must have gone through 3 or 4 gas cap gaskets in a couple of months. I have been using rubber gaskets that I sourced from a vendor here in the world. The rubber gasket appears to be the correct size, but after removing and reinstalling the gas cap a few times it bunches up and stretches and gets all messed up. A couple of times it ripped and once almost fell inside the gas tank while removing the gas cap. I think that the original gasket was made of cork material. Is the rubber gasket the problem? Should I make or by a cork gasket? or is the spring action inside the gas cap maybe too strong? Anybody else having this issue? Thanks, Bill. |
Drums66 |
Feb 15 2018, 07:47 PM
Post
#2
|
914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
.....Did you talk to the Vendor?
(IMG:style_emoticons/default/bye1.gif) |
daytona |
Feb 15 2018, 08:04 PM
Post
#3
|
daytona Group: Members Posts: 435 Joined: 13-April 14 From: Ormond Beach, Florida Member No.: 17,249 Region Association: South East States |
Rather not go there.
|
Tom_T |
Feb 16 2018, 10:04 AM
Post
#4
|
TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California |
Bill,
The original gaskets as I recall were a stiffer pinkish/reddish rubber material &/or in cork because of the compression & torque problems which you've been experiencing. So a soft & pliable silicone or other soft rubber would do as you say - it's just the wrong material for the application. I'd try to see if you can find a same size gasket which is that hard rubber (or cork) & try that. If you find one oversized on outside diameter &/or undersized on the inner diameter, then you can cut them to size if you have a patter gasket to go from. Good Luck! (IMG:style_emoticons/default/beerchug.gif) Tom /////// |
daytona |
Feb 16 2018, 10:45 AM
Post
#5
|
daytona Group: Members Posts: 435 Joined: 13-April 14 From: Ormond Beach, Florida Member No.: 17,249 Region Association: South East States |
Hi Tom T,
Thanks for the information. I was thinking of going to one of the auto stores and buy some cork gasket material and make my own. Bill. |
Retroracer |
Feb 16 2018, 11:20 AM
Post
#6
|
Senior Member Group: Members Posts: 609 Joined: 7-July 13 From: Bend OR Member No.: 16,100 Region Association: Pacific Northwest |
Let us know what solution you come up with. I am having similar issues with a replacement gasket - probably from the same source as you!
- Tony |
mepstein |
Feb 16 2018, 11:47 AM
Post
#7
|
914-6 GT in waiting Group: Members Posts: 19,255 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Maybe a little lube on the gasket and fuel filler face. Let it slide instead of catch.
I used my ‘71 as a semi daily driver for the past couple of years and no issues with replacement rubber gaskets. |
dr914@autoatlanta.com |
Feb 16 2018, 11:52 AM
Post
#8
|
914 Guru Group: Members Posts: 7,835 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
Mark's replacement gasket is a good one, but the real problem is that the reproduction gas caps clip on too tight for the cork gasket, and even Mark's. 356 Devotion makes the cap and they are investigating recasting so it clips on with less pressure If you compare used factory with the reproduction you can see the difference
Hi all, Having a problem with the gas cap on my 74. The gas cap is almost new and in really good shape. However, I must have gone through 3 or 4 gas cap gaskets in a couple of months. I have been using rubber gaskets that I sourced from a vendor here in the world. The rubber gasket appears to be the correct size, but after removing and reinstalling the gas cap a few times it bunches up and stretches and gets all messed up. A couple of times it ripped and once almost fell inside the gas tank while removing the gas cap. I think that the original gasket was made of cork material. Is the rubber gasket the problem? Should I make or by a cork gasket? or is the spring action inside the gas cap maybe too strong? Anybody else having this issue? Thanks, Bill. |
Chris914n6 |
Feb 16 2018, 01:45 PM
Post
#9
|
Jackstands are my life. Group: Members Posts: 3,316 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
The gasket attaches to a floating piece that should rotate. So when you lock the cap the gasket should stay stuck to the filler. DR914s explanation makes sense.
|
dcheek |
Feb 16 2018, 02:05 PM
Post
#10
|
Senior Member Group: Members Posts: 691 Joined: 30-May 06 From: Westfield, New Jersey Member No.: 6,103 |
I just hand cut one our of 1/16" thick Neoprene. Works fine an gas doesn't hurt it.
Dave |
Mikey914 |
Feb 16 2018, 02:05 PM
Post
#11
|
The rubber man Group: Members Posts: 12,656 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
The factory caps make it very difficult to install a factory like seal. Its a fiberous "paper" gasket.
This is why we made a rubber version. We were able to determine that there was a mixup on the material and we had got the organic rubber used on some of these. Fortunately we have been able to identify when this occurred and will be sending out new gaskets ro all affected by the recall on these. Our apologies, yo should see these showing up next week. Sincerely Mark Whitesell |
NeunEinVier |
Feb 16 2018, 05:48 PM
Post
#12
|
Member Group: Members Posts: 110 Joined: 24-December 15 From: In front of the smoke. Member No.: 19,488 Region Association: None |
Maybe this cork-rubber stuff could work? Says "Oil, Coolant, Gasoline".
1/16" https://www.autozone.com/sealants-glues-adh...sheet/67679_0_0 1/8" https://www.autozone.com/sealants-glues-adh...equestid=577100 |
Mikey914 |
Feb 17 2018, 02:54 AM
Post
#13
|
The rubber man Group: Members Posts: 12,656 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
We stamp ours, and can make from any material. The reason we chose rubber was the prongs on the cap can't be stretched over without breaking the gasket. If you find a better material let me know.
|
GeorgeRud |
Feb 17 2018, 08:15 AM
Post
#14
|
Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
I think the original gasket on my -6 was made of leather. I did replace it with Mikey’s in my original cap and it does seem to work well and not bunch up in the original cap.
|
daytona |
Feb 20 2018, 11:09 AM
Post
#15
|
daytona Group: Members Posts: 435 Joined: 13-April 14 From: Ormond Beach, Florida Member No.: 17,249 Region Association: South East States |
Hi guys I have an update on the gas cap gasket problem.
I purchase some gasket material from Auto Zone that was recommended by NeunEinVier on his post. Cut the gasket and installed it on the cap. Removed the cap and put it back on several times with no issues. Let's see if it lasts. By the way, my cap is an original part; not aftermarket. Thank you all for the help. Bill. |
NeunEinVier |
Feb 20 2018, 12:55 PM
Post
#16
|
Member Group: Members Posts: 110 Joined: 24-December 15 From: In front of the smoke. Member No.: 19,488 Region Association: None |
Awesome did you use the 1/16" or 1/8" thickness?
|
gothspeed |
Feb 20 2018, 01:01 PM
Post
#17
|
Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
We stamp ours, and can make from any material. The reason we chose rubber was the prongs on the cap can't be stretched over without breaking the gasket. If you find a better material let me know. Will you be making cork versions? (IMG:style_emoticons/default/smile.gif) |
daytona |
Feb 20 2018, 01:12 PM
Post
#18
|
daytona Group: Members Posts: 435 Joined: 13-April 14 From: Ormond Beach, Florida Member No.: 17,249 Region Association: South East States |
Hi NeunEinVier,
I used the 1/16 material. I compared it to the original gasket material that I had from the gas cap, and it was very close. The real test will be when I drive a bit with full tank and none of the fuel spills out during hard turns (IMG:style_emoticons/default/happy11.gif) |
Mikey914 |
Feb 20 2018, 01:19 PM
Post
#19
|
The rubber man Group: Members Posts: 12,656 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
We have sourced a slightly thicker gasket material that is made specifically for gas. Its more expensive but have tested it and fit is good.
Will be recalling all from the last 6 months and sending out. Mark |
Lo-Fi Version | Time is now: 6th May 2024 - 10:10 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |