Balance Shaft Removal

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Sprocket Timing Marks

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not disassemble the balance shaft assembles. Remove and install the balance shafts as complete assemblies.

Rotate the crankshaft until the left hand balance shaft sprocket timing mark is at 12:00. The right hand balance shaft sprocket timing mark should be at 2:30. The crankshaft sprocket timing mark should be at 4:30. Make sure the 3 timing marks on the sprockets line up with a dark link on the chain (1). Every 11-crankshaft rotations, 3 of the 5 dark links on the timing chain will line up with the timing marks.

Fig 2: View Of Balance Shaft Chain Tensioner

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: It may be necessary to retract the tensioner plunger by rotating the link plate clockwise. Insert a small tool into the link plate hole in order to prevent the tensioner from ratcheting to full extension.

Remove the balance shaft chain tensioner and bolts.

Fig 3: View Of Balance Shaft Drive Chain

Courtesy of GENERAL MOTORS CORP.

Remove the chain from the crankshaft sprocket.

IMPORTANT: It may be necessary to remove the right balance shaft bolts and rotate the retainer plate counter-clockwise in order to gain chain slack.

Remove the chain from the balancer sprockets.

Fig 4: View Of Balance Shaft Chain Guide

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Rotate the balance shafts to check for free rotation. If the balance shafts do not turn free, inspect the balance shaft bearings and bearing surface for damage.

Remove the balance shaft chain guide bolts.
Remove the balance shaft chain guide.

Fig 5: View Of Balance Shafts

Courtesy of GENERAL MOTORS CORP.

Remove the balance shaft assembly retaining bolts.
Remove the balance shaft assemblies.