This will be my first time replacing valve cover gaskets on a Cad 390 and wanted to see if there is anything special I should be aware of. Cork? Cork/rubber? Cork/metal? Rubber? Glue gasket to cover with non hardening sealant? Leaks are mostly coming from the rear which I understand is fairly common with this engine. The car does have air, restricting access somewhat. Any tips much appreciated.
I like the Cork Gaskets.
The secret of getting a good seal is to ensure the cover flange is completely flat
Glue the gasket to the cover with a bead of Loctite 5900, then a smear of 5900 on the head surface.
Tighten by hand, till touching nicely, then after half a day, then complete the tightening to factory torque specs.
As these days one isn't constantly needing to adjust the tappets as with a mechanical cam, the covers never need to come off again.
Bruce. >:D
x2 on using cork gaskets. If you still have leaks, some people have had good luck with the little “wings†that spread the bolt pressure.
Great tips all. Thinking I may as well blast the covers and paint them while I'm at it.