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Old 02-16-2010, 01:50 PM
TylerH860's Avatar
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,188
Where is it boiling over? I had some coolant "bubbling" out of my coolant expansion tank because of a pinhole leak. New expansion tank, problem solved.

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Old 02-16-2010, 03:27 PM
mespe's Avatar
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,848
Could be several things, including a weak coolant cap. If the system doesn't get pressurized, it will boil over.

To check for head gasket leak, with engine cold, remove coolant cap. Start engine. Look to see if air is bubbling out of the coolant reservoir.

Depends on how much is boiling over,,, you stated a liter, well that's ALOT, you sure it wasn't just a few ounces?
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Old 02-16-2010, 05:08 PM
Ian White's Avatar
Join Date: Jan 2009
Location: Spokane, Washington
Posts: 655
Correct cap for a 617 cooling system cap is 15 PSI or 1.03 bar. Check all the said variables and eliminate the knowns. We are looking for a specific problem, which will show up in the suggested test.


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