Evening all. After having water loss and a steaming exhaust on and off for 12 months decided to bite the bullet and go for serious repair. Started taking a few bits off then all what was left was the dreaded cylinder head bolts and studs. Amazingly all came out no problem and the heads pretty much fell off. Head gasket had given way on number 8 cylinder and was letting water into the exhaust valve. Everything else looks well, have ground the valves in and checked clearances. So question is do the experts put any sealants on the new gaskets when refitting or shall i just fit everything dry, hopefully it will all go back together as easy. Thanks
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The new BGA gaskets, in standard and extra thick, have a red bead of sealant around the edge just like the NLA Payen ones. No need for additional sealant but, if you must, then Wellseal would be the best.Dave
1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.
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Saintstag.
I would recommend that you go for the new BGA gaskets. The silicone beading round the outside ensures a proper seal in that area, where coolant will often seep out. Also, the tooling for the older type of gasket was getting very worn, and as a result the thickness of gasket material between the bores and the waterways at the back of the engine was less than it should be, causing premature failure there. The failure of your later type was almost certainly due to the fixings being loose. New gaskets will need re-torquing at least twice after fitting to get a permanent seal.
Mike.
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