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Old 08-22-2012, 01:29 PM
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head gasket test

Has any tech tried this test. Pull glow plugs and pressurize coolant system looking for coolant out of glow plugs on the 6.0l?
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Old 08-22-2012, 01:33 PM
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I always just hooked my pressure tester up to that degas hose on the left side of the degas bottle and pressure tested it.
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Old 08-22-2012, 01:41 PM
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I hooked up the tester to the degas bottle in place of the cap. I was not trying to read pressure. I wanted to see if head gaskets are bad. when coolant comes out of glow plug holes. It was a fast and easy test.
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Old 08-24-2012, 05:37 AM
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Has anyone done this?
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Old 08-24-2012, 06:29 AM
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Here is the problem I can see you having if you pressurize the coolant system to look for leaks. If you do have a leak you could force coolant into the cylinder and cause a hydro-lock situation. Check out post #1 in this thread and he probably explains it better why you do not want to pressurize the coolant system.

Troubleshooting coolant loss (white residue around cooling system components(degas))
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Old 08-24-2012, 02:32 PM
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Here is what I had. I purchased the truck used. Had no smoke because they changed both coolers. Drove truck home and the exhaust had a smell. Coolant pressure never wen't above 2psi as indicated by the degas to gauge and drive test. Purchased a coolant dye test for co2 in coolant. Found the color change of the dye so I remove the glow plugs and pressurized the system to help me comfirm head gaskets. It wouldn't hold pressure as coolant went out glow plugs. Had no boil over or smoke
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Old 08-24-2012, 02:35 PM
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Aretoo if you are looking for coolant leaks, you must suspect something. If so, why drive it without verifying problem.
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Old 08-24-2012, 03:42 PM
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I do not have any leaks my gaskets are good, confirmed by block-chek and coolant pressure gauge. My reply was in response to you asking anyone if they had done your test. I ws trying to explain to you the danger of testing your head gaskets by pressurizing the system. I didnt want you to pressurize your system and hydro-lock your motor because you have a leak.
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Old 08-24-2012, 08:31 PM
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Aretoo I never had intentions to start it. I do not know what block check you are referring to. I had suspicion that gaskets were gone. I did your other test but pressure never went up passed 2 psi. I just though if you feel as strongly as I did of a gasket problem that the test was the last one for me. The truck is in the yard ready for the tear down.
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