My 1998 GMC has a coolant leak somewhere that appears to be on the front of
the engine. Living in Michigan and no garage its hard to see where it is. I
will tear it apart and see if I can find where its leaking. I was just
wondering if anyone has had or are these prone to leaks in this area. Maybe
some information can save me time in the cold looking for it.
It will either be the water pump, intake gasket, or it might
even be something as simple as the t/stat gasket. You should
be able to see the t/stat quite easily and rule it out. Intake is
hard to see as the aluminum brackets that bolt to the front
of the engine cover up most of the head to intake intersections.
Water pump will be obvious if you can see coolant coming
from the vent hole on the bottom side of the water pump.
Or you can reach under the water pump and see if you get
any coolant on your fingers (engine "not" running, of course)
I wouldn't advise anyone using stop leak on any cooling system.. Stop Leak
products generally narrow (already small) passages in the engine, radiator,
and pipes, so the system doesn't cool as effectively as it could. Also, the
compound can break apart in chunks, and block passageways completely,
causing overheating problems, I've also seen the stuff get wedged into the
thermostat, so it wasn't able to properly close, making for a REALLY long
warm up time in the winter..
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