Camshaft Drive System

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

The camshaft drive system consists of one primary timing drive chain driven by the crankshaft sprocket. The primary timing drive chain drives two intermediate drive shaft sprockets. Each oil pressure fed intermediate drive shaft sprocket drives separate secondary timing drive chains. Each secondary timing drive chain drives the respective cylinder head's intake and exhaust camshaft position actuators.

The primary timing drive chain uses two stationary timing drive chain guides and an oil pressure hydraulically actuated tensioner with built-in shoe. The tensioner minimizes timing drive chain noise and provides accurate valve action by keeping slack out of the timing drive chains and continuously adjusting for timing drive chain wear. The tensioner incorporates a plunger that adjusts out with wear allowing only a minimal amount of backlash. The tensioner is equipped with an oiling jet to spray oil onto the timing components during engine operation. The secondary timing drive chains use a stationary timing drive chain guide and movable timing drive chain shoe. The secondary timing drive chain shoe is under tension from an oil pressure hydraulically actuated tensioner. All tensioners are sealed to the head or block using a rubber coated steel gasket. The gasket traps an adequate oil reserve to ensure quiet start-up.

From the initial production of the High Feature V6 there have been four timing drive systems. This application may have been built using the third or fourth design.

The third design uses an inverted tooth (IT) timing drive chain on the primary timing drive components and roller timing drive components on the secondary components. NOTE: The difference between the third design and the previous second design is a revised reluctor wheel on the camshaft position actuators. The reluctor wheels were revised due to revised camshaft position sensors.

The third design primary timing drive chain uses an IT timing drive chain and a crankshaft sprocket with IT timing drive chain teeth. The primary timing drive chain connects the crankshaft sprocket with the left and right side intermediate drive shaft sprockets. The third design intermediate drive shaft sprockets incorporate IT primary timing drive chain sprocket teeth and roller timing drive chain secondary timing drive chain sprocket teeth. The third design actuators incorporate a new reluctor wheel and cannot be used on earlier designs.

The fourth design uses IT timing drive components on both the primary and secondary components. NOTE: The pitch of the IT chain has changed therefore third and fourth primary IT components are not interchangeable.

The two timing drive system's individual rotating components cannot be mixed. DO NOT mix third design timing drive chain rotating components with fourth design timing drive chain rotating components.

The following components are the ONLY components that are same between the third and fourth design:

All timing drive tensioners
Primary Guides
Secondary Shoes - Pivoting guides