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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1814 (Engine Mechanical - 2.2L (L61)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain Tensioner Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Measuring Timing Chain Tensioner Assembly
    GM714496Courtesy of GENERAL MOTORS CORP.
  1. Inspect the timing chain tensioner. If the timing chain tensioner, O-ring seal, or washer is damaged, replace the timing chain tensioner or O-ring seal as applicable.
  2. Measure the timing chain tensioner assembly from end to end. If the timing chain tensioner is to be replaced, a new tensioner should be supplied in the fully compressed non-active state. A tensioner in the compressed state will measure 72 mm (2.83 in) (a) from end to end. A tensioner in the active state will measure 85 mm (3.35 in) (a) from end to end.
    3. Fig 2: Compressing Timing Chain Tensioner
    GM797246Courtesy of GENERAL MOTORS CORP.
  3. If the timing chain tensioner is not in the compressed state, perform the following steps:
    1. Remove the piston assembly from the body of the timing chain tensioner by pulling it out.
    2. Install the J 45027-2 (2) into a vise.
    3. Install the notch end of the piston assembly into the J 45027-2 (2).
    4. Using the J 45027-1 (1), turn the ratchet cylinder into the piston.
    4. Fig 3: Measuring Timing Chain Tensioner Assembly
    GM714496Courtesy of GENERAL MOTORS CORP.
  4. Inspect the bore of the tensioner body for dirt, debris, and damage. If any damage appears, replace the tensioner. Clean dirt or debris out with a lint-free cloth.
  5. Install the compressed piston assembly back into the timing chain tensioner body until it stops at the bottom of the bore. Do not compress the piston assembly against the bottom of the bore. If the piston assembly is compressed against the bottom of the bore, it will activate the tensioner, which will then need to be reset again.
  6. At this point the tensioner should measure approximately 72 mm (2.83 in) (a) from end to end. If the tensioner does not read 72 mm (2.83 in) (a) from end to end, repeat steps 3-5.
    7. Fig 4: Identifying Timing Chain Tensioner
    GM412158Courtesy of GENERAL MOTORS CORP.
  7. Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
    8. NOTE: Refer to Fastener Notice .
    IMPORTANT: Ensure the timing chain tensioner seal is centered throughout the torque procedure to eliminate the possibility of an oil leak.
  8. Install the timing chain tensioner assembly.

    Tighten:  Tighten the timing chain tensioner to 75 N.m (55 lb ft).

  9. The timing chain tensioner is released by compressing the tensioner 2 mm (0.079 in) which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.
  10. Install the camshaft cover. Refer to Camshaft Cover Replacement .
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (2.2L (L61) and 3.5L (L66)) .
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