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John, Buick Master Technician
Category: Buick
Satisfied Customers: 9176
Experience:  ASE A1-A8 w/L1 GM master technician.Factory certified with 40 years experience.
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2006 Buick Lucerne CXL: V8..the low oil pressure light come..presure

Resolved Question:

Hello, I have a 2006 Buick Lucerne CXL V8 that had the low oil pressure light come on. The car did not run hot or make any unusual noise. I read someplace on the web about a prssure relief spring that can sometimes bind causing zero presure. Also it needs a new oil pan gasket. How hard is it to change the oil pan gasket and what is involved on dealing with this spring? Thanks in advance, Ken.
Submitted: 4 years ago.
Category: Buick
Expert:  John replied 4 years ago.

Hello & Welcome to JA,

 

This is a pretty big job (6.7hrs warranty) transmission has to be removed

Exhaust Manifold Front Pipe Replacement (RPO LD8)

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.


    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  1. Remove the rear exhaust manifold pipe.
  2. Remove the transaxle.
  3. Remove the front exhaust pipe to exhaust manifold bolts (2).
    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.

    Important: The EGR valve inlet pipe incorporates a crush seal connection at the water pump housing. The EGR valve inlet pipe must be replaced if disconnected from the water pump housing.

  4. Disconnect the EGR inlet pipe nut from the front exhaust manifold pipe.
    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  5. Remove the front exhaust manifold pipe to lower crankcase bolt.
  6. Remove the front exhaust manifold pipe to cylinder head stud.
  7. Remove the front exhaust manifold pipe.
  8. Remove the front exhaust manifold pipe seal from the left exhaust manifold and discard the seal.
  9. Remove the exhaust manifold flange retainer.

Oil Pan Replacement

Tools Required

Engine Front Cover Installation Guide Pins


    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  1. Drain the engine oil. Remove the front exhaust manifold pipe.
  2. Disconnect the engine harness electrical connector (2) from the oil level sensor.
    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  3. Loosen the oil pan bolts (1).
  4. Remove the oil pan (2) and discard the oil pan gasket.
    Object Number: 204585  Size: SH
    Click here for detailed picture of above image.
  5. Remove the oil level sensor (1), if necessary.
  6. Clean and inspect the oil pan, if necessary.
  7. .


    Object Number: 204585  Size: SH
    Click here for detailed picture of above image.
  8. Install the oil level sensor (1), if necessary.

    Tighten
    Tighten the sensor to 20 N·m (15 lb ft).


    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  9. Completely fill and slightly overfill the oil pan seal groove with a continuous bead of RTV sealant.
  10. Ensure the RTV sealant is higher than the oil pan sealing surface (1) by 3 mm (0.118 in).
    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  11. To prevent shifting of the oil pan, install one special tools into the bolt hole in each side of the lower crankcase.
    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  12. Position the oil pan (2) to the lower crankcase and finger start the oil pan bolts (1).
    Object Number: 204292  Size: SH
    Click here for detailed picture of above image.
  13. Tighten the oil pan bolts.

    Tighten

    1. Tighten the bolts a first pass to 8 N·m (71 lb in).
    2. Tighten the bolts a final pass to 12 N·m (106 lb in).

    Object Number:(NNN) NNN-NNNN Size: SH
    Click here for detailed picture of above image.
  14. Connect the engine harness electrical connector (2) to the oil level sensor.
  15. Install the front exhaust manifold pipe. Fill the engine oil.
John, Buick Master Technician
Category: Buick
Satisfied Customers: 9176
Experience: ASE A1-A8 w/L1 GM master technician.Factory certified with 40 years experience.
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