Marks on Camshaft Gears 1 and 2 Align to the LEFT of J 42069-20

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying J 42069-20

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Use the J 42069-40 to turn the eccentric on the upper idler pulley COUNTERCLOCKWISE until the marks on the camshaft gears and on the J 42069-20 are in alignment, the high point of the idler pulley eccentric will be in approximately the 9 o'clock position.
Tighten: Tighten the upper idler pulley bolt, while holding the eccentric in place with the J 42069-40 to prevent movement, to 40 N.m (30 lb ft).
Remove the J 42069-10 and the J 42069-20.

Fig 2: Identifying Index Mark On Oil Pump Cover

Courtesy of GENERAL MOTORS CORP.

Rotate the crankshaft in the engine rotational direction, clockwise 2 revolutions using the J 42098 until reaching 60 degrees Before Top Dead Center (BTDC). See Special Tools and Equipment .
The 60 degrees BTDC point can be identified by the index mark on the oil pump cover.

Fig 3: Identifying J 42069-20

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Ensure the moveable lever is positioned toward the crankshaft.

Install the J 42069-10 to the crankshaft sprocket with the knurled bolt.
Rotate the crankshaft in the engine rotational direction, clockwise using the J 42098 until the lever of the J 42069-10 firmly contacts the water pump pulley flange. See Special Tools and Equipment .
The #1 cylinder is at Top Dead Center (TDC) at this point.
Secure the moveable lever of the tool to the water pump pulley flange.
IMPORTANT: Ensure that the crankshaft is not 180 degrees off TDC.
The reference marks on the camshaft gears should be aligned with the corresponding notches on the rear timing belt cover at this point. If they are not aligned, the engine is 180 degrees off.
Install the J 42069-20 to camshaft gears 1 and 2.
Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20.
Repeat the procedure again if the marks do not align.
If camshaft gears 1 and 2 are properly aligned, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.