warped block?

J

jonboy

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I mentioned this briefly in a previous thread.

basically a blown head gasket after a topend rebuild including a skimmed head, new cam etc. That rebuild wasn't due to an overheating problem.

...a failure in a cooling hose caused an overheating this time, but the mechanic says the block will be warped.....I can't find any reference to warped cylinder blocks so far and wonder whether I can just ask for the new gasket and reassembly ....as obviously if the block needs skimming it's a total engine out and rebuild. big money, or more than I can afford right now anyway

The mechanic is saying it's a waste of money not doing the whole job.
As he hasn't got the head off yet, he's just assessed the job from the evidence of blown head gasket, water in the exhaust, bubbles in the water reservoir.....
So, again, is a warped block likely ??

Thanx for your views J.
 
The mating surface of the block can be checked with a straightedge for a first-order look at whethe it's straight. A low tech approximation can be made by tightly stretching a pair of thin wires diagonally across the block; they should touch where they cross.

I'm no machinist but sometimes, (maybe always if you're racing) the block is machined but its not my expectation that this is done routinely.
 
Blocks get "decked" when there is enough damage to the surface. That damage is generally caused by corrosion. The chance that the block is warped by heat is very low- but so simple to test for with a "Mechanics Straightedge" and a set of feeler gauges.
 
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