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XfireZ51 · 11-25-2010

Pull plugs and see which if any look like they've been steam cleaned. It may not be a head gasket. If it looks like either #4 or #3 cylinder, it can be the IH to head interface. Coolant port runs very close to the primary runners of those cylinders. Very little material separating the port and coolant. Over time it can corrupt the gasket and burrow its way under it especially during high vacuum situations like idle or decel.

11-25-2010	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: 90 ZR1: Oh crud, did I break it? Pull plugs and see which if any look like they've been steam cleaned. It may not be a head gasket. If it looks like either #4 or #3 cylinder, it can be the IH to head interface. Coolant port runs very close to the primary runners of those cylinders. Very little material separating the port and coolant. Over time it can corrupt the gasket and burrow its way under it especially during high vacuum situations like idle or decel. Last edited by XfireZ51; 11-25-2010 at 10:10 PM.