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Old 07-10-2012, 12:58 AM   #1
bluestone
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Member#: 36583
Join Date: May 2003
Chapter/Region: SCIC
Location: Irvine, CA
Vehicle:
2004 WRX sedan
Aspen White

Default Using Coolant Combustion Leak Checker

How do you use this without the coolant overflowing? I tried both at the lower fill neck on the radiator and the upper tank, and after the engine is running a couple seconds the coolant level goes up the fill neck and gets sucked into the tester, contaminating the fluid. Do I need to hold it more firmly on the neck to keep pressure in the system?

Talking about this type of tester:
http://www.arrowheadradiator.com/hea..._leak_test.htm
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Old 07-10-2012, 02:39 PM   #2
italy wrx
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PSM

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You need to drain coolant out of the radiator until the coolant level is low enough so only gases enter the tester...
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Old 07-10-2012, 05:16 PM   #3
bluestone
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does the coolant level just rise a certain amount and then stop? i'm going to try again at the upper overflow tank but I'm nervous about the coolant overflowing out of the tank. the radiator has a bend right underneath the filler neck so it's hard to tell where the level is when using the radiator
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Old 07-11-2012, 01:41 PM   #4
italy wrx
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The coolant will rise until the t-stat opens to allow flow. You may have better luck if you get the engine to operating temp. and CAREFULLY( I mean CAREFULLY! The coolant is under pressure and can burn you) remove the cap to see what the coolant level is. If it's too high, shut off the engine and drain some coolant then restart and see where your at.. When you restart, the coolant may surge up but, if you want you can put the cap on and just turn it to the first position so it not completely sealed then take it off after the coolant has settled
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Old 07-11-2012, 03:31 PM   #5
bluestone
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The last time I popped the cap when the engine was hot, it started squirting coolant out. I think I will try letting it sit an hour or two for the coolant to cool a bit, but the engine will still be hot, that might work better?
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Old 07-13-2012, 03:36 AM   #6
italy wrx
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Whatever you're comfortable with... You just need to get the coolant level to a point where no coolant will enter the tester.
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