Q: I have a coolant leak at the bypass pipe, where the hose from throttle body to the bypass pipe. 2000 Chevrolet Venture

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THe hose connecting the bypass pipe to the throttle body leaks when driving, stop and wait with engine running a few minutes it stops, You can run the engine for as long as you want and no leaks. Drive around the block and it leaks again then stop and after a few minutes it stops leaking again. I'm at a loss, I changed the clamp type and location no change.

My car has 366000 miles.
My car has an automatic transmission.

Hi there - I suspect there is a tiny crack in the coolant bypass tube that is, against all odds, sealing itself as coolant temperature comes up. I recommend a coolant bypass tube replacement by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, and replace this part to avoid future problems.

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