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heretic
09-01-2010, 07:54 PM
1995 325i

New fan clutch, water pump, thermostat, upper and lower rad hoses, rad pressure washed.

I KNOW there is some air in circuit and I keep trying to bleed it out.

When driving temp stays at 12 o'clock (medium) then will occasionally climb and sometimes hit red, then the temp drops (I replaced the thermostat).
Other issue is that heat is very sporadic when the heat is on full.

My thoughts are:
1) partially blocked heater core
2) heater valves malfunctioning
3) air in the circuit is causing all the problems

Any advice ?

I'm thinking of draining all fluid, removing hoses to heater core and flushing that seperately, do the heater valve cleaning, refill and bleed.

heretic
09-02-2010, 03:16 PM
update #1; Heater valves click when power applied and are receiving power.

Expansion cap has "leak" so switched it with other car.

Worst case scenario could be head gasket.

Daneee
09-02-2010, 06:16 PM
update #1; Heater valves click when power applied and are receiving power.

Expansion cap has "leak" so switched it with other car.

Worst case scenario could be head gasket.
if the water pump new and still over heating = head gasket!!!!

blastedM3
09-03-2010, 12:22 AM
it could be a faulty thermostat. Take it out and see if it still overheats. if it still does than its ur headgasket.

heretic
09-03-2010, 05:17 PM
and the winner is:: head gasket

Ceeker
09-03-2010, 05:53 PM
and the winner is:: head gasket

oh boy oh joy oh bliss..lol