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Old 04-17-2007, 07:44 AM
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427 Bbc

Have .060. 427 Chevy, Block Has Been O-ringed And Am Using .062 Copper Head Gaskets, Will Hold Compression But Leak Water. Block Is Studded Any Suggestions?
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Old 04-17-2007, 11:51 AM
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Well if your block is sound (did you have it sonic tested?) then it must be your heads. Is water getting into the combustion chamber or into the oil?
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Old 04-17-2007, 05:51 PM
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Sounds like a head gasket is leaking.

Moving to engine forum.
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Old 04-17-2007, 07:17 PM
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Quote:
But Leak Water. Block Is Studded Any Suggestions?

Can you say "Pipe dope"...? Might be the head gaskets but doubt it...? To many times have I seen guys install head studs and not put pipe sealer or whats known as pipe dope on them...

Worth its weight in gold (err water)...
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Old 04-17-2007, 07:38 PM
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A liberal coating on both sides with the red colored spray "HI tack" gasket cement will stop your coolant woes.. I see these guys have never used solid copper gaskets before...
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Old 04-18-2007, 09:00 AM
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Did you use some copper coating on that shim? Where is the water going? Dont forget that your intake may be leaking especially if it was angle milled.
Let us know whats going on.
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Old 05-07-2008, 05:59 PM
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waynejosie

High tac is back you won't weep when it stops your leak
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Old 05-07-2008, 06:39 PM
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I would guess that the o-ring is sitting too far proud of the deck. Copper will only yield so far and you need more thickness to absorb the ring. In other words, about 10% is the limit of elasticity. A 0.060" gasket uses 0.006" ring height above deck. A 0.040" gasket uses 0.004" ring height above deck.

Why are you using such a thick gasket?
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