Lotus Elan

Sealant on Two or Four Sides of Curved Cork End Gaskets

PostPost by: thehackmechanic » Fri Mar 08, 2019 4:22 am

Forgive me if this has been covered, but I couldn't find the answer.

I'm about to seal up my oil pan. I see the dozens of posts about RTV versus Aviation Form-A-Gasket, and the advice to stick the long pan gaskets to the block first and THEN mount the pan. I also see advice to use sealant on both sides of the curved cork end gaskets, but my question is... I assume that "both sides" means the bottom side against the pan and the top side that faces down inside the groove, but what about the two other sides of the curved cork end gaskets that face inward and outward? Some of the posts say that the sealant helps the gasket slide into the groove. That sounds like the sides of the gasket to me. Should the bottom surface against the pan get a sightly thicker layer and the other three surfaces only get a skimming?


'74 Europa TCS, 20k miles, stored since '79, resurrected in 2019
'73 BMW 3.0CSi
'72 BMW 2002tii, '73 BMW 2002
'72 BMW Bavaria
'79 BMW 635CSi
'99 BMW Z3M Coupe
"The Hack Mechanic," six books available on Amazon
Posts: 14
Joined: 24 Jun 2013
Location: Boston, MA

PostPost by: Chrispy » Fri Mar 08, 2019 4:46 am

I did mine recently and still have zero leaks, so I feel that makes me qualified to comment :lol:

I used the oil proof black permatex rtv on the curved bits I trimmed them to size first and then smeared the RTV all over and cleaned up and that squeezed out. Then used aviation sealant No.3 on the cork sections on the block and pan side.

I nipped down the bolts on the pan evenly, and then the next day torqued to spec. I've found with the cork gaskets if you don't give the No.3 a bit of time to cure they can squeeze out a bit.
Elan +2 #0245
Exige S2 Supercharged
Third Gear
Third Gear
Posts: 304
Joined: 29 Oct 2017
Location: Brisbane, Australia

Total Online:

Users browsing this forum: 69S4 and 12 guests