C4 Coolant Leak
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C4 Coolant Leak
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I own a 1989 Z51 coupe with just over 70,000. miles. When I purchased the car a year ago, I experienced coolant droplets covering the power sttering reservoir, upper radiator hose and hood. Using GM coolant system seal tabs cleared that up, however, recently it has produced drops of coolant at both ends of the upper radiator hose as well as a mist on top of the hose. Both times the mist has appeared on top of the hose, the car has stuttered when shifting into third gear. It could just be the CAGS but I think it's odd it only happens when I find coolant on top of the radiator hose. Has anyone experienced a similar problem?
I own a 1989 Z51 coupe with just over 70,000. miles. When I purchased the car a year ago, I experienced coolant droplets covering the power sttering reservoir, upper radiator hose and hood. Using GM coolant system seal tabs cleared that up, however, recently it has produced drops of coolant at both ends of the upper radiator hose as well as a mist on top of the hose. Both times the mist has appeared on top of the hose, the car has stuttered when shifting into third gear. It could just be the CAGS but I think it's odd it only happens when I find coolant on top of the radiator hose. Has anyone experienced a similar problem?
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
It's probably only leaking when the car is very hot... which means more pressure in the system and some squirts out the hoses, or somewhere else, maybe an oil cooler line, and the belt is flinging it.
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Originally Posted by CentralCoaster
It's probably only leaking when the car is very hot... which means more pressure in the system and some squirts out the hoses, or somewhere else, maybe an oil cooler line, and the belt is flinging it.
Drove it today, no leaks. Temp got to 194. The leaks were at 200 plus like you suggested, however, they did occur when the weather was colder. Yesterday was 70, I had one drop. Today was 67, nothing. I'm going to put a new upper hose on it, pressure test it and pray. Thanks for the oil line info, that's something I didn't consider.
