possible head gasket

CHEVROLET S-10
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BOBJR
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i have a 1994 s10 4dr blazer.4.3 vortec ''w'' not sure how many miles on it.it has been blowing thick white smoke out of exhaust.just changed the cpi.i was told it was a head gasket and i have been told it was an intake gasket.which could it be,and what signs should i look for to tell if it was a gasket?
Nov 9, 2007 at 7:18 PM
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RASMATAZ
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To confirm the headgasket do below

Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.
Nov 9, 2007 at 7:36 PM
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