Foaming Coolant '79 GMC van

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01-13-2014, 06:26 PM

kaylak

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Foaming Coolant '79 GMC van

Van has a hard time idling, but starts up normally when we pump the gas. Noticed today, after it stalled out, the coolant has been foaming white...any ideas?

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01-13-2014, 06:36 PM

Mike

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I'm going to suspect head gasket because of the foaming nature of the coolant. If it was an intake gasket, the coolant would be disappearing.

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01-13-2014, 06:57 PM

chevy82

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I agree possible headgasket. Does the cooling system have pressure after a few minutes of running ? And you might want to pull the plugs and check for coolant on the plugs.