Overheating of the engine may cause the cylinder head to expand, severely straining the head bolts and damaging the threads in the engine block. This commonly results in a blown head gasket. Our technicians tell us the engine block threads must be repaired before the cylinder head is reinstalled.
Car Problem Reports
Cadillac DeVille DTS Engine Overheating May Cause Cylinder Head to Expand
Cadillac DeVille DTS Problem
Visitor, 2001 Cadillac DeVille DTS, 45,000 mi
No indications from temp gauge that there was overheating. Nevertheless, coolant leaks from radiator were diagnosed to overpressure in the cooling system due to blown head gasket.
Engine removal was necessary. Total part parts and labor at a dealer was $5500
Subsequent coolant leaks a few thousand miles later. Still being investigated.