[collier89139]

I have a 2002 Forester that is still overheating
Replaced
thermostat//water pump//radiator//timing belt

Started car and still overheats....not sure why
any thoughts??

Thanks

 

[OldGoat38]

Maybe it's not overheating and the temp sensor is bad?

Under what conditions does it overheat? Idling? Traffic? Highway? Does it boil over?

 

[collier89139]

I have replaced the ECT sensor
it is overheating when idling. I start the car and let it ran for 20 minutes and it slowly heated up
not sure what else to replace

 

[dirteemac]

Has it been burped properly?

 

[collier89139]

I replaced the ECT sensor
it shows that it is getting hot while idling
I do not see any smoke
it just shows its heating up

 

[collier89139]

yes I ran it with the cap off for over 15 minutes

 

[Shakeman]

yes I ran it with the cap off for over 15 minutes

... and when you did this, did the coolant ever rise into the radiator neck and begin to flow into the overflow tube?

Also, do you have good heat in the passenger cabin?

 

[SuperSubaru]

Is the Rad Cap Sealing for Good Pressure?

 

[for4me]

Overheating in the winter?

I read somewhere that the boxer engines will overheat if the heater core is completely plugged up. Apparently, the heater water opens the thermostat.

 

[SuperSubaru]

I read somewhere that the boxer engines will overheat if the heater core is completely plugged up. Apparently, the heater water opens the thermostat.

I agree, my first suspicion was a blocked heater core. I suggested the rad cap as well, hoping for a simple fix.

 

[hecky50]

My boy had the same problem on a 98 Imprezza 2.5. Random overheating ,temps to 240. Turned out to be head gaskets.

 

[adc]

My boy had the same problem on a 98 Imprezza 2.5. Random overheating ,temps to 240. Turned out to be head gaskets.

Yea..always consider HG's when a Subaru overheats.

 

[collier89139]

Is there a way to test if it is the Heater core? Are they simple to replace?

 

[Shakeman]

Is there a way to test if it is the Heater core? Are they simple to replace?

Yes, see if there is plenty of heat in the passenger cabin area ... crank the heater!!!! ... If there is little heat, your heater core MIGHT be clogged.

On a different note, is your Check Engine Light on, and are your fans turning on when the engine overheats?

 

[adc]

Heater cores are not simple to replace. Far, from it.

 

[collier89139]

No CEL on
The fans do not turn on
I wonder if it is a bad fuse or relay?

 

[Shakeman]

I think you may have multiple problems,

... again, what is the status of the cabin heater ... plenty of heat, or no to little heat?

secondly, you started a different thread where you had a code P0483, which is for the cooling fan relay. Double-check your connections at the rad. fans, check fuses and re-seat the relay. Look here too,

http://www.subaruforester.org/vbulletin/f88/how-test-radiator-fan-relay-motor-functionality-103912/