98 Subaru Overheating
I have a '98 Subaru Legacy outback, a couple of
months ago it started overheating randomly once a
week or every other week or so. Now, before you all
aske like everyone else, I check my fluids once a
week every week. Since the overheating began I
check them everyday to make sure the coolant is
draining out of the reservoir to attemp to avoid the
problem.
My coolant reservoir would overflow and not drain
back into the radiator, then would drain it
completely dry and take a little bit more into the
radiator and I would refill the reservoir to the cold fill
line. Now it is rarely draining all of the necessary
coolant back on its own (It returns some but not all)
and I'm having to remove my reservoir and pour the
remaining coolant that was overflow into the
radiator. Very rarely am I having to add more
coolant to the radiator.
It has now begun to overheat everyday in the
morning and at night, however, driving the same
distances and exact same roads in the middle of
the day it does not overheat 90% of the time.
It has a brand new water pump, timing belt, and
thermostat.
There are no tell tale signs that it is the head gasket.
No sweet burning smell, no smoke, and not losing
coolant.
The coolant is clean, no dirt, not oil, no residue. And
my oil is clear from all signs of there being a coolant
leak into it.
My check engine light is on and the codes reading
are a malfunctioning knock sensor and a misfire in
cylinders 3 and 4.
We are stumped to say the least.
