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Old 12-19-2013, 03:18 PM   #1
garylau
Scooby Newbie
 
Member#: 243386
Join Date: Apr 2010
Location: Stevens Point, WI
Vehicle:
1992 Legacy

Default Overheating, tricky to diagnose

A couple days ago, my 92 Legacy (Ej22 n/a) ran hot for a couple minutes on the way to work, during which time I had no heat. But then it suddenly it started cooling, and the heat came back. The next day it started running hot and continued to do so, with no heat. I had to let it cool down for a couple hours, and then managed to limp it home. I never let the temp get in the red, though. I have only had a few minutes to check things out, due to work and the lack of a garage, but here's what I found. At initial overheating, when I shut it off to let it cool, I had steam rising from the front. I saw coolant around the front left of the motor. On a quick inspection, I did not see exactly where it came from. Upper radiator hose was hot. At home, I ran it long enough to get to normal operating temperature. I did not see any leaking coolant this time, but there was what sounded like bearing noise that seemed to be coming from the front passenger side. Still no heat. I don't know whether to think the noise is the water pump, even though the sound seems to be coming from the wrong area. Maybe the sound is traveling through the timing cover, and playing a trick on my ears? I'm having a tough time figuring this one out. Any ideas? I should mention that my coolant was a little low just prior to these problems, and I had to add about a gallon. So there was a leak prior to overheating. Thank you.
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Old 12-19-2013, 03:20 PM   #2
garylau
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Member#: 243386
Join Date: Apr 2010
Location: Stevens Point, WI
Vehicle:
1992 Legacy

Default

Oh, and when I ran it a little at home, the upper radiator hose did not get hot.
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Old 12-19-2013, 04:14 PM   #3
JohnM10
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Member#: 244231
Join Date: Apr 2010
Chapter/Region: NESIC
Location: Providence, RI, USA
Vehicle:
2006 Impreza 2.5i 5M
Crystal Grey Metallic

Default

It could be a bad thermostat or just air in the system. Did you try burping it?
In regards to the leak, check all the hoses and hose clamps.
In regards to the noise I would pull off the small timing belt cover and see if that helps narrow down the noise to the water pump. Any idea when the timing belt tensioner and pullys were last changed?
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Old 12-19-2013, 05:10 PM   #4
garylau
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Member#: 243386
Join Date: Apr 2010
Location: Stevens Point, WI
Vehicle:
1992 Legacy

Default

I'm going to try burping it tomorrow. I'll remove the small cover and check things out, also. And I unfortunately was unable to get any kind of maintenance record, but the car is nearing 350k miles.
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