Timing Belt Drive Sprocket Installation

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: Identifying 1st and 2nd Design Drive Sprocket

Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

2006 model year and later engines use a second design timing belt drive sprocket and powertrain control module (PCM).
The second design drive sprocket is NOT interchangeable with the first design 2004-2005 applications.

Inspect the drive belt sprocket and identify for proper usage.
- The 2004-2005 applications use a first design sprocket with rectangular shaped teeth (1).
- The 2006 and later applications use a second design sprocket with trapezoid shaped teeth (2).

Fig 2: View Of Key & Crankshaft Drive Sprocket

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The PCM must perform the idle learn procedure to determine the minimum throttle position and to establish idle speed when any of the following components are replaced:

Throttle body
Timing belt
Timing belt drive sprocket
Crankshaft and bearings

Refer to Idle Learn .

Install the key (123) and sprocket (237).

Fig 3: Exploded View Of Crankshaft Gear & Components

Courtesy of GENERAL MOTORS CORP.

Install the guide (236).
Install the crankshaft position (CKP) sensor (704) and harness (701).

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the guide (703), nuts (702), and bolts (730).
Tighten: Tighten the nuts and bolts to 9.8 N.m (87 lb in).

Fig 4: Aligning Crankshaft Sprocket Mark With Pointer On Oil pump Housing

Courtesy of GENERAL MOTORS CORP.

Rotate the crankshaft to align the mark (2) on the sprocket (237) with the pointer (1) on the oil pump housing.