Engine coolant loss continued

[94mustangcobra]

so i pulled the intake apart and i found oil up the number 6 intake runner, and when i pulled the lower intake there's buildup all in the cylinder and the other seven are clean and shiny, the motor is brand new only 3K miles on it, oil changed every 1K miles, and the heads were rebuilt using the same valves but new springs, valve seats, retainers, and a three angle valve job. the heads were also straight so i didn't mill them. does this seem for sure like a head gasket or anybody have a suggestions before i pull the heads??

 

[Vipersix]

Are you burning up oil too? You never mentioned that before. The only place you could be losing oil and coolant into your cylinder - that I can think of - is from a crap gasket. I wouldn't bet on a head gasket though, I'd say it's more likely a manifold gasket. Did the gasket look like crap when you took the manifold off?

 

[divit250r]

Any chance the oil is coming in from the PCV? I know mine likes to leave a nice stain / wet trail in the intake. Just a thought.

Scott

 

[Bullitt95]

I'd say it's more likely a manifold gasket.

I'd also say it's a leaking lower manifold-to-head plenum gasket that's allowing oil to enter an intake port from the lifter valley.