I have a 92 Accord EX (not sure the motor, but it is 16 valve) that loses water, about 1.5 gallons every two weeks. It's not leaking anywhere and there is no steam in the exhaust. I did a compression test, 190 psi on all cylinders. What else can I check? Leak down test?

Thanks,

Doug D

1987 Grand National - Slow
2004 Infiniti G35 coupe, 6 speed - Slower
1992 Accord EX, 2 door - Slowest

 

First off i reccomend a cooling system pressure test.. chk radiator cap, does car overheat?? how do u know it is not leaking anywhere??? water pump could be leaking while driving ,,,

 

On thing to also remember; the water pump (thru a fluke in how they have to seal the shaft) often leaks thru a vent hole upon the engines' cooling off at night.
The dual lips seal is oriented such that it seals harder against the shaft once coolant pressure is applied behind it. The duggaboo about this is; from the seal wearing over the course of time, once pressure is relieved the seal actually pulls away from the shaft and starts leaking. The tell-tale will be a green trace from where it's leaking.

If the water drops in the overfow bottle consistently to the same level, there is the possibility this could indicate the level that your leak is at (yes, you do have a leak). Back of the radiator, pourous hose, corroded clamp etc.

Good hunting

P