Monte Carlo & Lumina Since the 1970s, the Monte Carlo has been an icon of American stock car racing. A 4-door version, the Lumina, was produced in the late 90's.
Platform: A-, G-, & W-body

Coolant into exhaust issues

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Old July 27th, 2021, 5:33 AM
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Default Coolant into exhaust issues

A friends 2000 Monte with a 3.4 v6 suddenly started running rough while blowing a lot of coolant vapor through the exhaust and the temp ran up. Fortunately he quit driving it and had it towed home. It will run but of course it blows out vapor. It appears that it has lost very little coolant. Before I start testing for a bad head gasket I wanted to know if there is any coolant connection or gasket that could allow coolant into the intake that could be causing this. Thanks if anyone has any idea on this.
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