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 Engine Overheating May Cause Cylinder Head to Expand
Cadillac DeVille Problem
Engine Affected: 4.6L V8
Average Mileage: 116,886 mi (58,000 mi - 203,000 mi)
Visitor, 1999 Cadillac DeVille, 144,000 mi
Engine constantly overheats...short and long trips. Replaced the thermostat and the overheating still continues, constantly feed it coolant. I had a diagnostic test performed and I am told that I have blown head gaskets, which can't be replaced without replacing the engine around 7K plus...I have found that the Northstar engine is the problem and GMC doesn't seem to care. The next time their company fails....please don't bail them out!!!!!
constant overheating and anti freeze consumption. shop checked it and said blown head gasket. 3000/5000$. BUT i added some blue devil head gasket sealer and i have put another 3000 miles on this car with no problems. runs great temp stays around 200. and to think i almost bought a new pickup because i thought this car was done for!!!
Visitor, 2004 Cadillac DeVille, 61,000 mi
My CAD RUNS REALLY GOOD BUT LATELY IT HEATS UP NEW WATER PUMP WAS PUT IN. AND FLUSHED EVERYTHING AND NO BLOWN HEAD GASKET . YOU DRIVE IT FOR ABOUT 10 MILES AND THEN THE LIGHT COMES ON HOT IDILE CAR . ANY HELP ON WHAT TO LOOOK FOR NEXT . I REALLY LIKE THIS CAR. THANKS RAY
Visitor, 1999 Cadillac DeVille, 67,000 mi
don't know what to do?
2001 DTS overheated, had to pay $2.400.00 to replace the engine,,,, this should of been a RECALL.....
Visitor, 2002 Cadillac DeVille
same its bullsh@t
Visitor, 2003 Cadillac DeVille, 77,000 mi
over heating, pulled head bolts out. Poor design. Cost$$$$$$ to much!!!!
Visitor, 2001 Cadillac DeVille, 130,000 mi
blown head gasket
Visitor, 2002 Cadillac DeVille, 180,000 mi
Overheated engine, at dealer four times, told something different each time. Engine finally had to be replaced.
Visitor, 1999 Cadillac DeVille, 104,000 mi
The mechanic states my heads are gone