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Coolant loss - fill cap of overflow tank???

froggy47

Well-known member
Joined
Oct 24, 2002
Messages
1,000
Location
CA
Corvette
Black 1996 LT4 Coupe/ 2004 Z06/Z16
I seem to be losing about 1 - 2 quarts of dex-cool mix every fillup (200 mi). The only trace I can see of coolant spill is out the top of the white overflow tank (RF tire area). The black main tank is full & rad cap seems ok, but I think I'll replace it anyway. GM or stant for the cap?

Car has 49k mi, runs great!

Car is new to me, prev owner replaced water pump & opti w/in past year.
 
Is it directly on the bottom of the water pump? Looks like it'll be hard to see, look from underneath or dirver side or pass side?

Thanks!
 
actually, it is best to just stick your hand in there (engine off of course!) and feel.... the water pump is silver, has no pulley on it, in the center of the engine, above the crank (main) pulley, and below the intake. The hole is on the bottom side of the pump... just feel underneath it and around it.... wet=bad pump. if you need a picture i can send one tonight
 
How many miles on your lt4 when head gasket blew? Racing it?
 
Leak found, lower front pass side of radiator - only when running - no drips when shut off. Need new radiator. Very glad I bought service contract.
 

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