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Old 09-26-2005, 12:14 AM   #1
Airboy
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Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default High coolant temperature

As I was driving through Montana at ~11pm (from Moab, Utah to Calgary, Alberta) I glanced down at the guage and noticed that the coolant temp gauge has moved past the "2/3" mark toward the H zone. The temperature would drop a bit if I coast and did not get much above the "2/3" mark. I took it easy until I reached the gas station. After refuelling the temperature gauge went back to the normal position just above the "1/3" mark. There was no visible leakage that we could see at that time. For the remaining 3.5 hour drive the coolant temp was normal.

Today I noticed that the overflow tank is not as full as before. I am pretty sure the level was just above the "Full" line before. Now the level is ~2" lower, or ~1" above the "Low" mark. What the heck happened here? I will call the dealership in the morning but I am guessing that the answer will be "keep an eye on it". I have a 2005 RS wagon with ~7300miles when this happened.



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Old 09-26-2005, 10:12 AM   #2
abosworth
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Red Mica

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Dude, you took that pic when you were going 90mph?? i hope it was on the interstate.
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Old 09-26-2005, 11:10 AM   #3
AJ711
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Location: Singletracks
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98 GM67 + 03 SG6
2 whls > 4 whls

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Quote:
Originally Posted by abosworth
Dude, you took that pic when you were going 90mph?? i hope it was on the interstate.
Get a clue, that is KMH. No NA car will have a speedo that goes up to 180 MPH. And notice his location; Canada --> KMH.

Back on subject, keep an eye on the coolant level. Check on it after it has sat all night as well, see if things have expanded back to normal. At the very least, pick up some de-ionized water from an autoparts store and pour it into the radiator cap area until it fills, cap it and drive around a bit, refil as necessary until the overflow tank is back to normal. And pick up some Water Wetter at the same time for added protection.

At the worst, take it to the dealership and have the system flushed. There may be an air pocket in there causeing things to heat up. It is odd that something bad should happen so early in the car's life. Is there any oil in the coolant? Or coolant in the oil?

You definitely weren't driving hard enough to really heat things up, so this is strange. Talk to the dealership and see what they recommend. If it is, "Keep and eye on things", take some of the protective measures above and see what happens. If you're still losing coolant, take it in for servicing and have them fix the issue.

AJ
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Old 12-09-2005, 01:08 AM   #4
johncarl
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Join Date: Nov 2004
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Location: Albuquerque, NM
Vehicle:
2005 Impreza 2.5RS
Blue Ridge Pearl

Default

Quote:
Originally Posted by Airboy
As I was driving through Montana at ~11pm (from Moab, Utah to Calgary, Alberta) I glanced down at the guage and noticed that the coolant temp gauge has moved past the "2/3" mark toward the H zone. The temperature would drop a bit if I coast and did not get much above the "2/3" mark. I took it easy until I reached the gas station. After refuelling the temperature gauge went back to the normal position just above the "1/3" mark. There was no visible leakage that we could see at that time. For the remaining 3.5 hour drive the coolant temp was normal.

Today I noticed that the overflow tank is not as full as before. I am pretty sure the level was just above the "Full" line before. Now the level is ~2" lower, or ~1" above the "Low" mark. What the heck happened here? I will call the dealership in the morning but I am guessing that the answer will be "keep an eye on it". I have a 2005 RS wagon with ~7300miles when this happened.



Airboy,
I had a similar problem with my 2005 RS. I was driving at night from oregon to california and started to smell some colant from the engine. I looked down to see that the car was hot, just like yours and I pulled over to see what was up. Well, I opened up the hood and the colant overflow container was completely full and spilling. I let the car cool down for a while and started it back up and I didnt have a problem untill the next day when I was around the southern california/arizona border. I pulled into a gas station and saw that the coolant was overflowing again... after it cooled down this time it sucked ALL the coolant from the overflow container. So, I filled the coolant up (and warmed the car up to make sure the fluid was at the right level) and continued. Later I talked to my friend about this problem with my brand new car and he said it was probably the altitude change or tempurature change that threw the car computer off. Im not sure if that means the air to fuel ratio was off or what, but I did take it into the dealership and they tested the coolant system pressure (fine) and made sure the head gasket hadnt blown. So, they had no idea what was wrong, but they said that the car was running great. Well, its been half a year, and I have watched the temp guage every day. Only once did it rise above the normal temp. but nothing serious. So, Anyways, I wanted to let you know that I had a similar problem, in similar circumstances and if you have any idea what the problem could be, PM me.
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Old 12-09-2005, 12:17 PM   #5
Airboy
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I ended up taking the car back to the dealership and they replaced the thermistat under warranty. It has been fine since.
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Old 12-10-2005, 12:24 PM   #6
Matt Monson
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99 2.5RS, '85 911
'73 914 and 2012 BRZ

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Continue to keep a close watch on your car. The exact same thing happened to me in a whiteout across Wyoming last Thanksgiving. What happened was the thermostat froze shut. I was in the middle of nowhere, and couldn't stop to really deal with it for 100 miles. I was so concerned that I actually opened up the raditator and siphoned the coolant from the overflow back into it using a quart Nalgene I had in the car. Once I hit a service station, I was able to pour a gallon of water over the front end and thaw out the thermostat. Temp dropped to normal and I was on my way.

Fast forward 6-7 weeks later. My car starts using a quart of oil every 2 weeks. And I was only driving about 200 miles a week. I knew that something was amiss and sourced a replacement engine. We swapped it in there one weekend. I wanted to see what was up, so I cracked the case on the old block. Every single bearing, crank and rod, showed signs of scorching and overheating. And there were 3 spun crank bearings. Why it never seized is totally beyond me. Now, just because this happened to me does not mean your incident will end with the same fate, but watch all indicators of engine health, not just coolant temp...
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Old 12-10-2005, 12:53 PM   #7
SiFuSpEc
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Location: Bedford, Ohio
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'05 2.5RS
#78 ST, MAXIMUM ATTACK!

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^^ lol when did that happen in relation to the time of your ownership??

starting to scare me..
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Old 12-10-2005, 01:33 PM   #8
Matt Monson
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Join Date: Jan 2000
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Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

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Car had 105k mi on it and had already been through a HG failure at 100k. But my HG failure was barely noticeable weeping and not the overheating catastrophic failures other have experienced. Age and mileage probably do have an influence on what happened to me. But the only thing you can do is wait and watch. Who knows, you could be fine for a couple of years and 60k mi and then have it go because you started the damage 50k miles earlier. Or your engine might last you to 250k mi. You just never know with these things...
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Old 12-17-2005, 09:37 PM   #9
johncarl
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Blue Ridge Pearl

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mine did it just under 12,000 I think
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Old 12-18-2005, 03:50 PM   #10
Texas25RS
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Crystal White Pearl Mica

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Not all 2.5s tear the engine apart... mine has had problems with heat... but both times were due to head gasket failures.

Welcome to the lack-of-reliability known as Subaru.... as fun as they are, they have some nasty "secrets"...
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