LY5 blown head gasket
09-10-2017, 12:54 PM
#1
LY5 blown head gasket 08 LY5 is puffing white smoke on startup only and losing coolant. Oil looks fine still. I plan on a compression check cold and hot before I start pulling it down. Is there anything else worth checking or looking at?
09-10-2017, 06:13 PM
#2
Teching In
Join Date: Mar 2016
Location: Orlando, FL
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White smoke coming from the exhaust and coolant loss means that there is coolant in the combustion chamber. Head gaskets can fail so that the only noticeable symptom is coolant coming out the exhaust so it wouldn't be too crazy if you didn't find any coolant in the oil. Seems to me like a blown head gasket. Other things it could be are a cracked head or block which are less plausible.
09-16-2017, 07:40 PM
#3
On The Tree
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Old school where you use a cylinder leak down tester, engine off and cold, remove the rad cap and one by one pressurize a cylinder with air and if you see bubbles in the rad hopefully it is only a bad head gasket. Remove a spark plug do the test, put the plug back in and move to the next one.
