Why would 1998 Subaru outback overheat after replacing thermostat water pump?
Sorry to say, but you probably have a blown head gasket. My
brother just had this same thing happen to his Sooby over the
weekend and that's what they told him. Do a Google search on
"Subaru Head Gasket Problems" and you'll see what I'm talking
Go here and see what others are saying.
Hi! I have some info that might help you also. First, did the
car run cool and fine before you changed the pump and thermostat?
If so, you may only need a thermostat. I changed my pump and
thermostat on my 95 2.2L, replaced the thermostat with a cheap one
from NAPA, and ran it. My motor ran hot, my radiator fans ran
constantly, and my temperature guage jumped up and down, never
getting cooler than half way. I pulled out the NAPA thermostat,
bought a factory thermostat from a Subaru dealer, and put it back
in. It cured all of my overheating problems, my fans hardly ever
run, and my temp guage stays at about 3/8 into the normal. It seems
like some things on these cars you MUST replace with factory parts,
or it will NOT run right! My thermostat costed about $22.00, pretty
cheap fix if this is your problem! Hope it helps!