losing water while the engine is cool and off

Asked by Mar 14, 2017 at 09:00 AM about the 2005 Chevrolet Silverado 1500 LB RWD

Question type: Maintenance & Repair

I replaced a leaking water pump, bypassed the heater core, and I am still losing water, not while the motor is running... but overnight.  We park on a dirt driveway... so it is hard to determine the exact water loss location... since we can't see a drip.

1 Answer

71,175

I would get the cooling system pressure tested. If you are losing coolant it is either leaking out onto the ground or going out the tailpipe. If it is going out of the tailpipe, that usually is an indication of a bad manifold gasket, head gasket or cracked cylinder head. Getting it pressure tested may tell you where the problem is.

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