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Gasket sealant

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UKROBK7:
Has anyone over here in the UK had any experience of using Edelbrock "Gasgacinch" gasket sealer on our 4 cylinder head gaskets when fitting them?  Cycle-X use it on their rebuilds and I've been told air-cooled VW owners use it as well.  I've got a tin of it and it looks almost like Evostik in texture.

Rob

the-chauffeur:

Hey Rob

Can't help with experience, but I'd be interested to know where you got hold of the Gasgacinch stuff from.  With the trouble I've been having with oil seepage from the head gaskets of my 350's (which apparently isn't all that uncommon) I'd be interested in giving it a go - but I can only find suppliers based in the US . . .

Thanks

UKROBK7:
I got mine from Retrodubs  on 01872 561194, he told me its a stock item and is sometimes on ebay (not at the moment).  I think I saw some posts about the stuff on the US site particularly for 836 conversions but haven't had time to search yet.  I'm not ready to mount the head so I've some time to find out what to do!!

If you decide to go ahead let us know how you get on.

Rob

K2-K6:
At the risk or boring everybody, I'm definitely for using a sealant in addition to the head gaskets on these engines.

Working on them in period the Honda genuine and some 3rd party gaskets definitely had a tacky coating at various points to I presume help adherance to the metal and stop oil seaping out. From memory these were around the cam-chain tunnel and the studs at the ends of the barrells (it's quite a while back to remember). So you'd not be going against the grain in my opinion.

If you look at a leaked one when stripping it off it's always been leaking oil past the gasket to surface interface, so esentially not a gasket failure as such just a lack of adherance to the metal that the oil slowly passes.

I've always found they are far more successful by using a sealant. I've used Blue hylomar very thinly applied and left to dry, then properly de-grease the surfaces to make sure it sticks when torqued (used to be able to get a Unipart product that seemed like the same in an aerosol which made a really nice thin coating). If you have to remove on prepped like this it is much harder to get of which to me indicates that it has done it's job. I've never re-torqued after running either.

It sounds to me that the gascacinch is very well worth looking at as a good way of getting a reliable joint seal.

the-chauffeur:

On the NOS 1975 US Honda head gasket kit I picked up with the additional seals (see Tips and Tricks), there was a coating of what I assume was some kind of sealant around the cam chain-way rectangle, the two holes at the very far left and right of the engine (for the cross headed bolts that hold the head to the cylinders) and the holes for the 8 cylinder studs that act as oil returns.  There were also built in crush rings around the two cylinder stud holes that act as oil feeds.

If I have to go through all this again, I think I'll be using sealant too, although sparingly.  I'm already resigned to using it on my 350's but only really want to do so around the oil feeds and oil returns . . .  Personally, I'm not keen on pasting it all over because I don't want any of it making its way into the oilways when the surfaces are compressed together.

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