Question about 1998 Chevrolet Malibu

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97 Chev Malibu Coolant and over heating issue

Okay to start off I have a 1997 3.1 V6 Chevy Malibu, 230,000kms on the clock. Yesterday it started overheating so I pulled to the side of the road and popped the hood. The was water pouring out of my cooleant tank so I let it cool down and topped it up with water. I started off again to get home and the car ran fine for about 10 mins, fine temp heaters on blowing warm air etc - then the heaters started blowing cold air and the temperature gauge started going up like ten. I stopped, cooled down topped up then repeated, this time I got home. I figured that it may be the thermostat sticking so I replaced that - it has made it better but it still occasionaly blows colder air and it runs hot (usually the temp is about 1/2 now it 3/4) also when we pop the hood (engine running) the car the coolant is over flowing, as soon as we stop the engine it sucks all the coolant out, and then blows some back in. The oil looks fine not milky etc. When it was on tick over it was running rough almost like a misfire and was puffing white smoke which was throwing moisture out (something which it never does) - Any ideas what could be causing it?

Thanks

Lisa

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  • gacallari May 17, 2009

    My 1998 Chevy Malibu 3.1L v6 had problems just like yours - Coolant pressure backing to the reservoir and over flowing, engine overheating and heater blowing cool air. Thermostat was replaced and didn't solve the issue. I found water/moisture in the intake throttle body when checking the air filter. Drove the car with having to add coolant and water every other day. Last week, coolant showed up in the oil. Mechanic says this engine is poorly designed and the intake manifold gasket fails allowing coolant to leak from the side of the manifold (drivers side) where you'll find a pool of coolant on the transmission below the leak area. The smell of coolant on the exhaust manifold is present. While driving the car in this condition the engine overheats and the head gasket fails causing cooling system pressure to enter the engine lubrication channels. As the gasket worsens water passes into the lubrication channels into the oil and crank case. Major Head Job. $2800. Time for a home fix for roughly $800 or junk the car - It's only worth $2000 on Kelly Blue Book.

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The fan is slow in chipping in allowing the engine to overheat damaging the already poor head gasket the car was built with.wire the fans to work as u turn the engine on after u change the thermostat and all hoses.

Posted on Jun 06, 2010

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Check water pump and hoses for leaks

Posted on Sep 18, 2008

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I had something just like it mine was cause of a bad heater cord I bypassed it you will not have a heater but its a way cheaper fix

Posted on Jun 28, 2009

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