| quote | Originally posted by Ramon: I believe I have a lower intake gasket failure It looks to be gas and coolant mix in the upper and lower plenum. The oil is clean as a whistle. earlier I did notice some moisture coming from the tail pipe.
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the dark stuff is carbon the milky stuff smells like gas
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Bad gasket(s) and/or crack Al can cause this.
Coolant gets pressure and engine pulls vacuum and Iffy gasket etc often lets coolant to intake.
If work was done to intake then very likely have wrong torque for bolts.
Just the Wrong torquing can cause problems. Most times, torque values are for clean dry threads.
If engine/heads was rebuilt then can change dimensions between heads etc. W/o checking that can cause cracking intakes.
Sensors etc in intake can cause stress cracks too.
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