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01Malibu

coolant loss but engine doesn't overheat

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For some reason, the truck is losing coolant and yet the engine doesn't overheat. I haven't driven it more than 25 miles one way. What could the problem be? It does release water out the exhaust at times. I hear a squealing sound when it first starts up. Temp gage never goes above 1/4.

When it is low on coolant it tends to make a trashing sound?? And you can hear a gurgling sound when you start it up.

I know it could be several things"

head gasket

intake gasket

freeze plug

thermostat

seals

I can't see any visible leaks however.

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Our 1992 Suburban with 196k did the same. It was a head gasket replacement. Not so bad when you consider age and mileage.

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Have the system pressure tested before you do anything else. it's very likely that you do have a head gasket leak if it's finding its way into the exhaust, but a pressure test will at least rule out an external leak that's less involved to fix.

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