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Coolant leak in throttle body

1K views 4 replies 2 participants last post by  esc2064 
#1 ·
I recently pulled my drive-train out to rebuild the transmission and degrease the engine but after reinstalling everything back tried to start it noticed coolant leaking at the exhaust pipe just before the oxygen sensor. It couldn't be the head gasket because the engine was running fine before I did all of this work so I took the intake hose off and took a peek at the throttle body and noticed coolant there. Any ideas why coolant is there? Could the throttle body valve went bad? Appreciate any help. Thanks.
 

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#3 ·
I pulled the entire intake manifold off and inspected the throttle body for any signs of any crack and no signs found. I do see a lot of coolant in the cylinders could my head gasket have gone bad? I drained the oil and yup coolant is present but why would coolant be pushed back into the intake? Is this even possible. Any help is greatly appreciated.
 
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