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What Causes My Car Engine to Overheat

I drive a 2003 Volkswagen Passat. Yesterday Ipressure test" this will determine if there
was making a long trip home and about 20is a coolant leak in the system. You want to
minutes into the trip the car said it wascheck the coolant level INSIDE the radiator,
overheating. The coolant level was fine, andnot just what is in the plastic jug on the
as soon as we would pull over the temperatureside of the engine.This car is pretty new
would drop back to normal (before we even gotstill, is it under warranty or are there high
to a complete stop.) Later in the trip itmiles? Since you mentioned that it ran hot
stopped cooling down when we would pull overwhile you were driving, and as soon as you
and there was a sort of popping/gurglingpulled over and slowed down the temperature
noise that sounded like it was sort of behindreturned to normal...my first thought would
the dash.Took it to the mechanic today andbe that there is lack of coolant circulation.
they have cleaned the radiator, checked theLow coolant level can also cause lack of
head gasket, etc. and they are baffled.Anycirculation, so make sure the radiator is
ideas? Hi there, The VERY first thing thatFULL.
needs to be done is a "cooling system



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