91 chevy 350 tbi. Buddy thought it was an intake manifold gasket so, he bought one to have me do it. Well, I say its possible that it could be a small head gasket leak.
I let her idle, gave it some revs and the temp gradually shoots up 213*. Shut her off, looked under the truck and there's a small puddle on the ground passenger side towards the rear of the engine. Dip stick looks/smells like normal oil. Pulled the valve cover off and sure enough, chocolate milk. I even looked/smelled the exhaust for the hell of it. I couldn't smell coolant and I couldn't see any color change, just very white.
EDIT: I did 2 more tests. The coolant in the rad has a constant bubbling. I think this next test indiactes if the intake manifold gasket is bad. I let the engine idle and then removed the oil cap to see if the idle changes and it does not. I think the head gasket is partially blown and the coolant is trickling down the passenger side head. But, then why would I have coolant mixed in my head and not on the dipstick?