Second Design 2007 - Present

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

IMPORTANT: This design, called "Second Design" in the 2007 parts catalog was used:

2007: Start of production in all applications except Cadillac CTS, SRX, STS and Buick LaCrosse. Those applications changed to this design mid-year.

2008: All Applications

Fig 1: Camshaft Timing Drive - Second Design 2007 - Present

Courtesy of GENERAL MOTORS CORP.

New secondary timing drive chains (1), with inverted tooth (IT) design.
The camshaft position actuators (2) incorporate new sprockets (3) that correspond with the use of IT chains on the secondary timing drive system.
The intake camshaft position actuators are different for the left and right sides.
The left and right secondary timing drive guides (4 and 9) are new due to the use of IT chains on the secondary timing drive system.
The intermediate timing drive sprockets (5 and 8) are new due to the use of IT chains on the secondary timing drive system.
New intake camshafts, not shown.
New design IT primary timing drive chain (7), with revised chain pitch to reduce noise.
New design IT crankshaft sprocket (6), with revised chain pitch to reduce noise.
Second design 2007 IT primary chain is NOT interchangeable with 2007 first design.