» » »

Cadillac Q&A

Ask Your Question

2001 Cadillac DeVille Question: AIR PUMP NOISE WHEN STARTING ENGINE

 

Question

Navyrocket, Fort Myers, FL, May 19, 2010, 11:00
 Rookie

When the engine is cold and I start the car I get a noise like a jet engine. Metal rubbing against metal. This lasts for about 45 seconds then stops. GM dealer replaced the air pump and fixed problem. Is this a common problem with a 2001 DeVille? Vehicle only has 8000 miles. Doesn't seem like that should fail at that mileage.

2 Answers
Flag This
  • Answer #1

    Bret Bodas from RepairPal Test Shop, May 19, 2010, 12:01
     Master

    Sometimes the age plays a part too, especially with a part like this. This pump will operate only when the engine is started cold (for a minute or so), and the amount you drive after that is irrelevant. So with this part, it may actually be worse to take a lot of short drives, which is often the case with low mileage vehicles.
    I've seen many of these pumps fail, and I would make sure that the air pump check valve is OK. This valve prevents exhaust gases from getting to the pump and damaging it, so I would ask the shop if they checked that part for proper operation.

    Reply
    Flag This
  • Answer #2

    773mtech May 19, 2010, 18:04
     Technician

    common problem with these cars but usually fail due to water damage because of a missing splash sheild driverside front of car

    Reply
    Flag This