I have found a company that make silcone rubber gaskets for aircraft engines, and wonders of the world, they also supply valve cover gaskets for SL6 , SB and BB Mopar engines, and also gaskets for the 727 and 904 transmission oil pan and some diff. covers.
Follow the link to Real Gaskets Tennessee. I am ordering one for the valve cover and one for the 904 oil pan, and I'll report back when I receive and mount them.


Another supplier of reusable gaskets for 727 and 904 transmission oil pan, and some diff. covers, is Ratech.

They also have a shimmed, low-torque mount, solid sleeve, that replaces the PITA crush-sleeve for the pinion bearings in Mopar rear axles.

If someone have used any of these gasket, please share the experience!

BTW, T'flite Patty's shop on eBay has Torqueflite 727 & 904 NYLOC Oil Pan Bolts that don't come loose. (search their site for 'nyloc')

Olaf.

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Aspenized

Interesting find on the valve cover gasket. Can't tell if it has a metal stiffener core or if it's just floppy silicone. Too bad no engine oil pan gasket. "No thanks" on the trans pan gasket; I like Mopar's own triple-seal rigid silicone-beaded 904 and 727 pan gaskets.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Hi Dan, do you know if the Mopar gasket and Ratech's gasket are the same?

I just saw some of the gasket pics at Real Gasket, and they looked like the floppy kind to me, even if I think the silicone quality they use is quite stiff. If they seal as good as they say - after all, in the aircraft biz you don't last long with inferior products without being banned - the floppyness is mostly a pain when installing, unless of course the flanges are slanted so the gasket is squeezed in one direction. I'll make a flopping video when I get them.

BTW, I gave them the address to this thread.

Olaf.

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Aspenized

Good to know! I usually reuse my rubber Felpro VC gaskets several times anyway, but worth a try with silicone.

Lou

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Home of Slant6-powered fun machines since 1988

I have been recommended these gaskets on various motorcycle forums, but bikes usually have cast aluminum cam covers that are not as likely to pinch or tear the gasket. However they have FAA approval for use on air-cooled aircraft engines with stamped steel rocker covers, so that made me think they would probably work fine for us. Anyway, I bought one for the Valiant since my rubber Felpro one broke when I took it off.

The silicone used is very hard, about as hard as the Felpro rubber. The gasket worked great and sealed right off (as well as the felpro rubber). The only downside is these gaskets do not have the little tabs that hold them on the valve cover, I suppose I could have used some gasket cement or something but it was not hard to position everything and get it bolted down.

I'll let everyone know how it lasts, I plan to check the bolt tightness and look for cold flowing and leaks in a few months.

and yes, it's floppy silicone.

My favorite valve cover gaskets of all time are the OEM Ford ones used on later 2.3l OHC motors. They not only have a stiffener core, they have little steel supports around each bolt hole to prevent the gasket from being crushed too far.

Of course my favorite valve covers are like the ones on most Nissan motors that do not have gaskets at all, just a nice groove for the silicone. Lasts for years and years and does not leak.

Sewing thread. One loop tied thru each bolt hole is plenty to hold the gasket in place during installation.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Real gaskets have oilpan gaskets now. Any one have experience? How well did the valve cover work

I have the valve cover gasket and oil pan gasket on the race car. No problems just do not over torque. You can get different thickness gaskets, I told him I wanted my valve cover gasket double thickness and it was no problem. The owner is a Mopar guy and has a 67 barracuda.

Will

Great to hear about the request-able gasket thickness and good oilpan gasket, Will. Thanks, Lou

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Home of Slant6-powered fun machines since 1988