88, invisable coolant leak help !!
Thread Starter
Instructor
Joined: Mar 2010
Posts: 189
Likes: 0
From: DFW texas
88, invisable coolant leak help !!
ok im a new vette owner, just bought one 3 weeks ago.
a 88 c4
well i just recently noticed coolant leaking, figured it was the water pump so i bought and installed a new one.
still leaks, hoses look fine, everything seems to be fine and i cant see where its leaking from, so today i took it to a shop and they did a pressure test, it hardly leaked during the pressure test, but while car is running it leaks more.
they couldnt figure out where it s coming from either.
all i can tell is that is coming from the right hand side of the car, and near the bottom, cant see where because of that support that goes across the bottom.
there is no signs of coolant anywhere except on the support beam at bottom of car.
freeze plugs are fine, hoses are fine, nothing visable around waterpump, ect.
i dont know what else to do
a 88 c4
well i just recently noticed coolant leaking, figured it was the water pump so i bought and installed a new one.
still leaks, hoses look fine, everything seems to be fine and i cant see where its leaking from, so today i took it to a shop and they did a pressure test, it hardly leaked during the pressure test, but while car is running it leaks more.
they couldnt figure out where it s coming from either.
all i can tell is that is coming from the right hand side of the car, and near the bottom, cant see where because of that support that goes across the bottom.
there is no signs of coolant anywhere except on the support beam at bottom of car.
freeze plugs are fine, hoses are fine, nothing visable around waterpump, ect.
i dont know what else to do
Thread Starter
Instructor
Joined: Mar 2010
Posts: 189
Likes: 0
From: DFW texas
its coming from bottom
so im out there looking over things, cant see anything except for the drip , it appears to be coming from center of engine bottom, near the lower most pully in the center
anyone know whats down there that could cause a coolant leak ?
anyone know whats down there that could cause a coolant leak ?
Racer
Joined: Jan 2010
Posts: 347
Likes: 12
From: Deltona FL
I had a small coolant leak that I could never find as well. It showed up front middle of the car. Still had it after the wp was replaced. Yesterday I had to replace the coolant line that goes to the TB because of a split in it and now no little puddle under the car in the mornings.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Recheck the freeze plugs, they are really hard to see. All your heater hoses are on that side too, my control valve has a small drip at the packing. Bypass the TB if you havent yet, dont think you have to worry too much about freeze ups in DFW Water is funny, it will drip a good ways from the source. Start at the lowest point you see water and keep going up til its dry. I am a plumber and its rarely where you see the drip to start with.
I didnt want to do it but one of my freeze plugs had a drip and I put sealer in the system and stopped the problem. No drips after a year.
Good luck!
I didnt want to do it but one of my freeze plugs had a drip and I put sealer in the system and stopped the problem. No drips after a year.
Good luck!
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Last edited by CAJUN C4; Apr 9, 2010 at 02:48 PM.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
C4's are famous for head gasket leaks. Look all the way around the head gasket gap. If you have to replace the head gaskets, use the Fel-Pro teflon coated head gaskets, they last a long time.
