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I really don't think it's a thermostat issue in my 96 Legacy 2.2
Posted 16 December 2012 - 03:44 PM
Posted 16 December 2012 - 06:18 PM
Now if you blow coolant out of the overflow bottle you most likely have a HG leaking. You can check it with a chemical tester as well. NAPA has them if you want to do it yourself.
Posted 16 December 2012 - 06:36 PM
Don't let your motor over heat, or you will ruin the motor.
Posted 16 December 2012 - 08:22 PM
Posted 16 December 2012 - 09:37 PM
Is the radiator full?
Is the radiator circulating properly?
Is the radiator cap functioning properly?
Posted 16 December 2012 - 10:18 PM
A leak down test will tell you much more than a compression test.
Posted 17 December 2012 - 08:58 AM
compression tests are useless on that engine, they'll pass a compression test every time on an initial headgasket breach.
I'm going to burp the old girl and do a compression test
there never will be on these motors, they don't fail that way unless it's abused.
At least there isn't evidence of water in the oil at the moment .
as lmdew mentioned in the first response to this post, test for exhaust gases in the coolant, since they blow by pushing exhaust gases into the coolant.
that's what happens when the exhaust gases get pushed into the coolant, it stops circulating properly, one of the radiator hoses will be cool as well.
I did notice today that when the heater isn't working only one heater hose at the firewall is hot and the other one on the other side is cold. Airlock in the heater core possibly?
that engine doesn't blow headgaskets so it was most likely overheated sometime prior in it's life. make sure the cooling system is properly working.
Posted 17 December 2012 - 11:18 PM
Posted 18 December 2012 - 08:53 AM
the more ominous possibility is headgasket. the prior leaking leads to possible overheating and as i already said before you mentioned the leak:
that engine doesn't blow headgaskets so it was most likely overheated sometime prior in it's life.
Posted 18 December 2012 - 05:48 PM
Posted 18 December 2012 - 07:26 PM
Probably just your heater control valve not opening completely. The extra revs give the water pump a boost and push hot water past the valve.
subarus, 90 - 04, do not have a heater control valve. heater core always has flow. the hvac controls inside the car just directs the air flow over the core when heat is needed.
Posted 19 December 2012 - 08:47 AM
Posted 20 December 2012 - 12:29 PM
Posted 20 December 2012 - 03:40 PM
If you still have a coolant leak a low coolant level will cause the same kind of problems.
When you refill the cooling system, fill the engine through the upper radiator hose first, then fill the radiator.
Posted 21 December 2012 - 06:40 PM
ALSO:The plastic coolant tank is bubbling worse than it was before. My best hope is a bad seal on the water pump as the culprit but I have a feeling it's the HG's? I'll put some of that combustion leak detector in the overflow tank and see if it change's color. I can do it that way right? 96 2.2
Posted 21 December 2012 - 09:42 PM
Probably don't need to bother at this point. Sounds to me like the head gaskets are cooked.
Posted 21 December 2012 - 10:21 PM
I'd found the source of the coolant loss he mentioned very quickly after I'd driven the car home from Ballard last summer. It was just a leaking plastic burp screw on the top passenger side of the radiator.
Ironically, that was probably helping the situation. Because it leaked there, Exhaust gasses and bubbles in coolant escaped, and no pressure built up, so coolant still circulates.
When you close the system, the pressure builds, the bubbles are trapped, and the coolant stops circulating when too big an air pocket builds up.
I've loosened that screw a hair to limp home severely blown headgasket cars. It works, until you need to fill the system again.
Posted 22 December 2012 - 11:18 AM
Posted 23 December 2012 - 07:25 PM
Posted 26 December 2012 - 01:35 PM
Posted 30 December 2012 - 09:16 PM
It's a no-brainer.
Posted 31 December 2012 - 01:18 AM
Posted 01 February 2013 - 12:54 PM
Posted 01 February 2013 - 01:11 PM
You DO NOT need new head bolts. Subaru head bolts are not stretch type. Don't let the parts person talk you into buying them.
You will want new intake manifold gaskets, usually exhaust manifold gaskets can be re-used. Single port exhaust gaskets are hard to come by in parts stores. They're $8-10 each at a dealer.
Posted 03 February 2013 - 06:41 PM
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