Oil had been leaking frequently from the engine rear seal. Technician could not find out what caused the problem.
1996 Pontiac Bonneville engine complaints
Page 3 of 3: complaints 41 to 44 of 44, newest first, as owners wrote them.
Engine knocks. Dealer has put two engines in vehicle, and problem stills exists. Manufacturer has been notified.
While driving the car over 45 MPH, it begans to shake and vibrate and create a noise that was very unpleasant and also caused ear pain, like a helicopter was in the car.
Engine backfires at start up, resulting in an engine fire. Referenced in ea02-030
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