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Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 12744
Experience:  ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
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what is the sequence and valve lash on a 2002 duramax 6.6

Resolved Question:

what is the sequence and valve lash on a 2002 duramax 6.6
Submitted: 6 years ago.
Category: Chevy
Expert:  Randall C replied 6 years ago.
Hello, below is the information you requested for valve lash adjustment

Valve Clearance Adjustment



  1. Remove the fan clutch.
  2. Remove both upper valve rocker arm covers.
  3. Rotate the engine in the normal direction and put the number one piston at Top Dead Center (TDC) of the compression stroke. Number one cylinder is right side front. While turning the engine watch the intake valve to open and close. Align the mark on the crankshaft balancer with the pointer on the engine.



  1. Loosen the valve clearance adjusting screws for the valve being adjusted.
  2. Insert the feeler gauge between the tip of rocker arm and the valve bridge.



Notice: Refer to fastener Notice in Service Precautions.

  1. Adjust the intake and the exhaust valve clearance to 0.3 mm (0.012 inch) with the engine cold. Shown are the valves that can be adjusted at number one COMPRESSION stroke TDC.
    • Tighten valve adjusting screw lock nut to 22 Nm (16 ft. lbs.) .



  1. Turn the engine one turn in the normal direction and put the number one piston at Top Dead Center (TDC) of the exhaust stroke to adjust the remaining valve clearance. While turning the engine watch the exhaust valve to open and close. Align the mark on the crankshaft balancer with the pointer on the engine.



  1. Loosen the valve clearance adjusting screws for the valves being adjusted.
  2. Insert the feeler gauge between the tip of rocker arm and the valve bridge.



  1. Adjust the valve clearance to 0.3 mm (0.0112 inch) with the engine cold. Shown are the valves that can be adjusted at number one EXHAUST stroke TDC.
    • Tighten valve clearance adjusting screw lock nut to 22 Nm (16 ft. lbs.) .
  1. Install both upper valve rocker arm covers.
  2. Install the fan clutch.

 

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