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Old 09-02-2003, 01:01 AM   #1
White 2.5rs
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Member#: 39936
Join Date: Jul 2003
Vehicle:
99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

Default old ass subaru question

ok my 89
its been overheating like a somebltch
i opened up the hood boom a pinhole leak on a small diameter hose thats long and weird shaped which i have to get from teh dealer...still havent done that

what i did do was replace the thermostat...which fixed the overheating problem for about 2 days the car ran really cool which i was happy about but now its just overheating again

ive heard bad things about subarus and their cooling systems but this just makes no sense

i dont think that pinhold leak could cuase such a maddoverheating and ive checked fluid in the radiator and its fine, theres oil in the car

ive got 116K miles and tonite on the freeway...its about 70 out and i was doin 65 i had to have the heat on full blast to keep it below the halfway mark on the temp gauge if i turned the heat off itd go up almost to red

ieve heard that it might be the head gasket? any ideas

please let me know
thanks
alex
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Old 09-02-2003, 11:42 AM   #2
ciper
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90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

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You are wrong. 89 is not anywhere near old. Get into the 70's and then I might agree.

My first guess would be you still have air trapped in the system. Find the steepest spot you can, so that the rad cap is well above the heater core. Open the cap and start the car. Let it run for a while even if some spills out, it may take awhile for the bubble to come out.

Make sure the coolant tank has plent of fluid. Drive the car around until its at operating temp and then park it on that same hill.
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Old 09-02-2003, 01:06 PM   #3
Legacy777
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Location: Houston, Tx
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1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

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was the new thermostat that you replaced the old one with exactly the same in physical shape and size?
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Old 09-02-2003, 01:18 PM   #4
White 2.5rs
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99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

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yeah it was from shucks i made sure it had the same spring tension as the other one too


ok ill try that air thing and get back to u guys
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Old 09-02-2003, 03:00 PM   #5
White 2.5rs
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99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

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that seems to have fixed it
the rad was very thirsty it drank like 1.25 liters maybe 1.5 and i took it out w/ the ac on and was mashin it and it didnt get hot

thanks a lot guys
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Old 09-02-2003, 04:06 PM   #6
ciper
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AWD 946 Rio Red Jpn built

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I think what Legacy777 is getting at is that you should NOT use aftermarket thermostats. Its one of those things that all of us get from the dealer becuase of some bad experiences.

Glad to know it worked
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Old 09-02-2003, 04:57 PM   #7
Legacy777
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AWD 6MT EJ22T AWIC Swap

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I wasn't mainly talking about the spring tension and stuff.....I was mainly talking about the physically dimensions, shape, etc.

I don't know how it is on the 80's subies. But on the EJ series motors, if you get a T-stat at schucks or some place it will not be very deep and will physically look different then the OEM one.

The differences are not only skin deep. The OEM unit has a higher resistance to temperature change then aftermarket. So if you get a flash of cold water, the OEM will not try and close. Also, opening amount is not as much with aftermarket, and how long it takes for the t-stat to open.

This all may not be an issue on the 80's motors.....but on the EJ series motors, it is an issue, and you will have problems. I've had it personally happen to me, and others have had the same problems.
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