>>
>> I have noticed in the past few trips that I am using water in the
>> radiator. It seems there is a leak somewhere and I am having a
>> hard time finding it. Changed the thermostat and also the short
>> bypass hose. I have looked for water leaks and I can't find any.
>> Is it possible that I have a head gasket going? How can I tell if
>> it is a head gasket?
>
>
>Christopher,
>
>If you think you have a blown or suspect head gasket problem, pick up a
>cooling system presurizing pump with a guage. Snap it on the water cap
>inlet and pump up the system. If it holds pressure, the leak could
>still be there but small. Heat the engine up and test again, there may
>now be a leak down. Next, turn on the engine and see if there is
>cylinder pressure coming from the water inlet. If water is being forced
>out the inlet, only while running, you may have a leaking head and or
>gasket.
>Good luck on your search.
>
>Jim Bounds
www.gmccoop.com
>
>Chris:
I was loosing small amounts of water from the cooling system. It finally
showed up on the ground below the radiator. I noted it was leaking near
the bottom portion of radiator.
My transmission cooler was in that area and when I removed it there was
the leak (small pin hole). The leak was caused by the transmission cooler
rubbing against the radiator and eventually chaffed a small hole. I
cleaned the area, applied acid flux and solder which sealed the leak.
(remember that you have to drain the radiator completely or you won't heat
the area sufficient to have the solder stick to the radiator--the water
acts as a heat sink--)
Also check where any hose is water hose is rubbing against anything that
can chaff a small pin. I had one hose that chaffed a small which was routed
over the top of the radiator near the filler cap
Jim gave you some excellent advice. I would also suggest you check your
oil. It may be entering your engine through the cylinders/cylinders and
discolor your oil.
Bob
wner-gmcmotorhome]On Behalf Of L.J. CHRISTOPH
