| engine where the water is going to be hotter than what is measured at the upper coolant pipe. Since we are typically using a 16psi cap, we have a good amount of headroom to prevent the water from pocketing in the galleys around the cylinders and exhaust ports. It would take around 260F to make that occur. The 230F number that I stated in my original post is what would be measured at the coolant pipe, not within the block. If you were at 230 in the upper radiator pipe, as you have observed, the coolant in the block would be considerably higher - probably beyond the boil-over threshold of the system.

[ ashspecz.com ] [ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
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