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Old 06-01-2013, 09:05 PM   #1
veel86
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Join Date: Jan 2012
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Location: South West Michigan
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2006 Wrx STi
Aspen White

Default coolant on top of block

About a week ago I had my TMIC off and there was no coolant on the block at all. Today I took my top mount off and there is a lot of coolant on top of the block. From what I can tell this is a fast leak then it stops. I check my coolant over flow tank and it is almost empty. I had the same problem about 6 months ago and this is the other other time it has happened. I looked at all the coolant lines I could find without taking the intake manifold off and they all looked fine. There is no coolant on the middle of the block just the left and right side of it. I only had access to one of the bolts on the cross over pipe and it was tight. I also have never overheated the car. To me it seems like there is a hose somewhere under the intake manifold that is causing the problem. I'll by a pressure tester to see if the will cause the system to leak, so i can see where it is coming from, but has anyone else had the same problem as me?

Thank you
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Old 06-02-2013, 01:56 AM   #2
urfsin
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I had the same problem and it turned out it was the lines feeding the throttle body. You may need to check those.
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Old 06-02-2013, 09:42 AM   #3
veel86
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Where yours damaged? I checked those lines and they looked fine, but I will double check everything.
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Old 06-02-2013, 10:18 AM   #4
WRXFanDave
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Have you checked around the top of the radiator core? Is there coolant anywhere else like on the fan shroud at the bottom or at the top of the radiator where the plastic top tank meets the core? I had a slow leak and my radiator went a while later. Might be worth a little time figuring out what kind of replacement core you want even if you don't end up needing one.
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Old 06-02-2013, 12:04 PM   #5
urfsin
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Quote:
Originally Posted by veel86 View Post
Where yours damaged? I checked those lines and they looked fine, but I will double check everything.
Mine had a pinhole leak on the return line near the bottom. I had to take the hose off just to inspect it and find the damaged area.

There are other area's too look at as well. You could be leaking from your coolant crossover pipe where it attaches to the block (however unlikely I think). Maybe check the lines feeding the heater core?

Remember, it just takes one stupid little leak to cause this problem. Also, liquid does funny things when when it tries to find it's way down hill. It could run along a hose for a while then drip down to your block because that's the lowest point.

I only found my leak because I was able to re-trace where the coolant was coming from by following the evidence.
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Old 06-02-2013, 04:50 PM   #6
veel86
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I cleaned all the coolant off the block and I went out and drove the car and there was not coolant lose. It is very intermittent.
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