» » »

GMC Q&A

Ask Your Question

2006 GMC Yukon Question: what would cause the oil pressure to go to 80 psi?

 

Question

mike58, Buckeye, AZ, December 05, 2011, 18:08
 Rookie

oil is at the right level

2 Answers
Flag This
  • Answer #1

    patrick mannion from Greg Solow's Engine Room, December 05, 2011, 19:47
    Profile_thumbnail
     Master

    Oil pressure will be higher when the oil is cold and at higher RPM, and lowest when it is hot and at idle. There are two engines manufacturer only gives min spec oil hot, 6psi at 1000 RPM, 18psi @2000 RPM, 24 psi @ 4000 RPM, same spec for both engines. I would verify oil pressure with a known good mechanical gauge.

    Flag This
  • Reply

    euromech, December 06, 2011, 06:59
     Journeyman

    Agree to use mechanical gauge to check oil pressure.Oil pump has a bypass valve to release excess pressure in engine.If bypass valve shot closed pressure builds up.Too high pressure could cause damage in engine .
    Even oil filter could blow up.They are not designed to hold that kind of pressure.

    Reply
    Flag This
  • Answer #2

    dale45 from Fairway Auto Repair, December 06, 2011, 15:10
    Profile_thumbnail
     Journeyman

    As said check the oil pressure with a manual gauge.
    Other possibilities, bad oil sender (common), IPC problem.

    Reply
    Flag This