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overpressure in coolant system? '98 S10


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js00694
Novice

Jan 15, 2007, 12:19 PM

Post #1 of 3 (2728 views)
post icon overpressure in coolant system? '98 S10 Sign In

ShockedTrying to find coolant leak in my son's 98 S10. Filled radiator with coolant, started engine with cap off and coolant shot out of the filler neck like a geyser. With cap on, the overflow reservoir pumps out coolant. Seems like something blocking the normal circulation. Any ideas?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 15, 2007, 2:08 PM

Post #2 of 3 (2724 views)
Re: overpressure in coolant system? '98 S10 Sign In

The radiator cap is the pressure regulator. This sounds more like a head gasket is allowing exhaust gas pressure to mess up the operation. A pressure test or exhaust gas test in cooling system would help with the diagnosis.

If it is the gaskets(s) hope no other problems are found $$$$ T



js00694
Novice

Jan 15, 2007, 2:21 PM

Post #3 of 3 (2723 views)
Re: overpressure in coolant system? '98 S10 Sign In

Not what I wanted to hear, but thanks so much for the reply.






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