Can anyone help?? I have an older thunderbird. I have replaced radiator,
thermostate, water pump, heater core, head gasket. It doesn't appear that
the head is leaking, no water in the oil. The car is overheating and going
through antifreeze like it is free. All hoses are good, no obvious leaks, no
plugged hoses, and still using a half gallon of antifreeze a day, in order to
prevent overheating. Seems that it will run (heat wise) where it should for
awhile then overheats again. Still gettting antifreeze on the inside of
windows even with new heater core. I am so puzzled and frustrated, can
anyone offer any suggestions?
If you are getting fogging on your windows with antifreeze, something
is leaking. take the heater out of the picture by bypassing the core
with a short piece of tubing or just hook one of the hoses in a loop.
See if that cures it. If it does, you still have a leak in the heater
Which engine do you have?
It sounds like a blown head gasket to me. You don't always get water
in the oil because of a blown head gasket. It could also be a cracked
Has someone done a pressure test on the engine (cold and hot)?
Going to see about getting a pressure test. I have been told that we are
having a problem with pressure but on up to the heater core. Wierd thing is
nothing seems to be blocked or plugged. Thanks for the advice, will try and
see about pressure.
Message posted via CarKB.com
The pressure test doesn't look at differences in pressure in different
parts of the system. Rather, you put a different cap on the radiator.
The radiator cap has a hose that is connected to an air pump (like a
baskball pump) and a pressure gage. Normally, the pressure does not go
down quickly. However, if there is a leak, the pressure will go down
quickly. So the pressure test tells if there is a leak, but has nothing
to do with differences in pressure in different parts of the cooling system.
You get the system pressure-checked, ask the tech what the pressure test
is, and what it tests and doesn't test.
Check the coolant recovery tank. When the engine warms up, the coolant expands
& the excess will get pushed by a pressure relief valve & drain into the tank.
the engine is cut off & cools, the coolant will contract thus causing a vacuum &
coolant from the tank back into the radiator.
Why you are getting antifreeze on the windows when the heater core was replaced
puzzles me. Somehow maybe a hose is not totally secured to the core & is being
into the fan & blown toward the windows.
i know what yomean,, theres more room out than in.... i did the
radiator,waterpump,heater core and belts hoses,timing chain on my 84
grande marquis,really nice car...... the new water pump started leaking
right out the weep hole. theres definatly more room out than in for some
If the "new" water pump is leaking out the weep hole then coolant is getting past
the seal & the "rebuilt" water pump is defective & should be exchanged. In the
'80s I worked at Western Auto & sold hundreds of water pumps & I have seen my
fair share of defects. It is easy to shop test a starter or alternator at the
request but not water pumps. The only defective one I saw before it was purchased
had a chipped impeller. I noticed it when examining the bolt hole pattern.
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