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CATEGORY LISTINGS > GM DIESEL > 1988 6.2 coolant building pressure(help) [ REFRESH ]
Thread Title:

1988 6.2 coolant building pressure(help)


Created On Wednesday January 23, 2008 18:00 Diesel Talk
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rockramcharger
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Joined: Jan 2008

Note Wednesday January 23, 2008 18:00 View thread in raw text format
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Hello, new to this site. I have A 6.2 the other day I looked down at the temp guage it was at 230 which is 30degrees hotter than normal .For the last 4 months it was always at 200. when I got to work it was pushing the coolant out. I took out the themostat and flushed the system. I put a new stat in it was ok for a couple of days. then when I turn it off I could hear the water boiling in the overflow jug. I then put a pressure guage on the radiator. At idle it builds pressure and will max the guage within 3min. now having said that. Im Leaning towards head gasket or head. my question is is there a way to tell which head is leaking. let me know
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Snafoow
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Joined: Mar 2006

Note Wednesday January 23, 2008 19:34 View thread in raw text format
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Remove the water pump belt so the coolant doesn’t circulate. Drain the coolant and then remove the water manifold on the front of the engine that goes from the left head too the right head. Refill the coolant system only as high as the open ports on the cylinder heads where you removed the water manifold. Start the engine and watch the coolant in these ports. The leaking side of coarse will have a steam mist and bubbles coming out of it.

http://img155.imageshack.us/img155/3893/62yg3.jpg
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rockramcharger
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Joined: Jan 2008

Note Wednesday January 23, 2008 19:58 View thread in raw text format
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wow, that was fast thank you snafoow.
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