Timing Belt Removal

Tools Required

• J 42069  Timing Belt Alignment Kit. See Special Tools and Equipment .
• J 42098  Crank Hub Torx Socket. See Special Tools and Equipment .

Fig 1: Rotating Crankshaft Using J 42098
Courtesy of GENERAL MOTORS CORP.
1. Rotate the crankshaft using the J 42098  until #1 cylinder is at 60 degrees Before Top Dead Center (BTDC). See Special Tools and Equipment .
Fig 2: Aligning Timing Belt At TDC
Courtesy of GENERAL MOTORS CORP.
2. Install the crankshaft locking tool J 42069-10.
3. Rotate the crankshaft in the engine rotational direction (clockwise) using the J 42098  until the #1 cylinder is at TDC and tighten lever arm to the water pump pulley flange. See Special Tools and Equipment .
Fig 3: Installing J 42069-1 & J 42069-2 To Camshaft Gears
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Ensure that the crankshaft is not 180 degrees off TDC. The reference marks on the camshaft gears should be aligned with the corresponding notched on the rear timing belt cover at this point. If they are not aligned, the engine is 180 degrees off.
4. Install the J 42069-1 and the J 42069-2 to the camshaft gears. If the J 42069-1 or the J 42069-2 do not fit it may be necessary to loosen the relevant timing belt idler pulley and turn the eccentric until the tool can be inserted.
Fig 4: Tightening Idler Pulley
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Do not move the crankshaft if the camshafts are not locked in place with J 42069-1 and J 42069-2.
5. Loosen the upper and lower idler pulleys.
6. Remove the timing belt.
7. Remove the lower idler pulley.