Technical leaky flathead

so I got a set of high compression heads for my flatty a while ago, and threw them on and now its leaking water. so I picked up some new gaskets, and I was wondering if there is any sort of gasket sealer I should put on there?

 

I always use k+w coppercoat....several coats...also if it has head bolts instead of studs put high temp tv on the threads


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so, did you have the heads checked before you put them on ?

 

the heads are brand new repros

 

I remember reading on here that if you use just water for a while it will rust up the threads and stop leaking! It worked for me(I have studs) Pete

 

Where is it leaking? Did you put sealer (permetex #2) on the head bolts/studs?

 

need more info - early or late FH, where are the leaks, did you check the new heads out first - even new ones can be warped!!

 

Mine leaked around the studs at first. I resealed and tourqed everything and have never had a problem since.

 

X2 on the coppercoat. and the new black gaskets. Make sure they line up with all the holes in the water jacket of the heads and the block. I have studs and used clear rv silicone on the threads and washers and nuts. A thin coat is pretty invisible and has kept the nuts and washers from rusting. no leaks. happy motoring