Question about 1999 Chevrolet Malibu
Could be a couple of problems. Check all around the head gaskets for any sign of leakage. This will only leak while it's running. Also check the hoses and thermostat housing gasket for signs of leakage. While the motor is running inspect the the clamps where the hoses connect and the entire hose itself. Lastly, check the tanks on the side of the radiator, also while it's running. The coolant system is under high pressure while running and often you'll see no leaks when the motor is off because there's no pressure.
Also check to see if the oil looks kind of milky. If it does you know you're getting coolant in there. If that's the case it's either the gasket or a cracked head. Good luck.
Posted on Oct 03, 2009
Testimonial: "Sound good I'll check it all out. Thanks, Mike Salantai"
The intake manifold gaskets on these are known to leak. the coolant leaks inside and runs into a cylinder and is burned up in the combustion process so you'd never see an external leak. i assume its a 3.1 or 3.4 v6 both have the same problem
Posted on Oct 03, 2009
Tossing in my two cents on this common problem. On my 99 Malibu
V6 turned out there was a cracked cylinder wall so after the expense of replacing the intake manifold gaskets which did no good I had to get another block and start over. One ace mechanic said intake gasket problem, the other said a cracked head, both were wrong. Both noted that there seemed to be no coolant in the exhaust.
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
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