Quote:
Originally Posted by Mxfrank
If you have ANY pressure in the system the next morning, you have a blocked radiator. Period, end of story, no other way this could happen. You are headed for trouble, no matter what cap you use.
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I wouldn't be so sure about that. The radiator and hoses were brand new when I bought the car with receipts. Changing the cap from 140 to 120 resolved the cold pressure issue. The cylinder head still leaks combustion gasses into the cooling system but the lower pressure cap keeps the problem in check. I'm sure some car somewhere has a blocked radiator but your categorical conclusion is not true. Hair line cracks in the OM603's #14 head is a well documented problem.