Would not pass emissions due to misfire and nox control system malfunction (most likely due to problems in only a few cylinders). Possible causes include lean air/fuel ratio, port vacuum leaks, egr system, erratic ignition timing, and/or other mechanical problems. *Tr
Engine & cooling
1989 Cadillac Deville Engine problems
Owners have filed 6 complaints about the 1989 Cadillac Deville's engine & cooling with NHTSA - 12% of all its complaints, most recently on March 8, 2008. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
- Complaints
- 6
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Engine complaints
FAN BELT FAILED.
OIL PUMP FAILED DUE TO WORN OUT BEARINGS. *AK
At 64 mph the engine failed due to a failure of the oil pump and defective engine bearings, at 6,000 miles later same problem occurred. The same problem also occurred at 3,000 miles and less. Took it to an engineering school and they found that the engine was improperly aligned, causing bearing and oil pump to fail without warning. *Ak
HEAT REGULATOR INOPERATIVE.
Engine coolant hose rotted out, causing coolant to expell from engine, resulting in engine block overheating, damaging cylinders. *Skd
Cadillac Deville engine complaints by year
Deville engine problems, every yearSource: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data