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I’m loosing coolant from the overflow tank but for the life of me I can’t find where it’s leaking? I have a new tank and cap on order along with all new hoses. Looked at the oil to make sure it’s not leaking into the case. It’s such a slow loss I can’t find any drips. Passenger floor is bone dry also.
suggestion on where else I should look?
Mine was losing coolant with NO external visible sign. Systmatically checked it. Turned out to be the water pump gaskets. Leaks like this are typically small and allow the coolant to seep slow enough not to drip (or turn to steam).
The plastic radiator tank could also have a tiny crack. Dye and a light will quickly eliminate all visible possibilities.
You could invest in a black light flashlight and get some coolant dye. I bought this one - it rocks!
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
take a peek on top of the front spring, sometimes the waterpump will leak on top of that area and puddle up on the cradle and you may not see it hit the floor... also check all radiator/heater hoses as well as the radiator... do you ever notice the car smoking?... hopefully it's just an external leak and the engine isn't eating it
Last edited by StingrayRebel; May 21, 2020 at 09:16 PM.
I had the same issue just a couple weeks ago. My tank was leaking from the bottom tube facing aft. The plastic had deteriorated enough to allow a small leak and it was pooling up on the top of the frame. Then running down onto some wiring cover. Never really saw anything on the ground and when I took the tank loose I saw the evidence under it. If your tank is around 10 years old or so my bet is it's the tanks.
Probably not gonna wanna do this but I had a leak on my daily 93 S10 overflow tank bottom side. I removed it and put several clear coats of lacquer on it and no leak for 10 yrs. LOL
Ironic but I just did a check of all my fluids on said S10 and coolant level was down, overflow tank was empty, the gasket on the tank cap was completely deteriorated so replaced it and hopefully that fixed it. I have seen no evidence of leakage in the past. Happened to look at the cap gasket and it was shot. Good luck finding your leak.
Coolant loss
