Question about 2004 Pontiac Aztek

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Water comes out of cap after I stop

Water comes out of cap when I stop

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When you stop the engine heat is still being generated inthe engine from all the hot bits. As there is now no water circulation through the radiator these cause local boiling which pushes the watemp right up. The pressure generated by this rise in temperature opens the cap expelling water. I would find the cause of the engine running hot to start with. Faulty fan /fan motor,failed viscous fan hub, thermostat blocked radiator are a few starting points

Posted on Jan 13, 2013


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Thanks for using Fixya!

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