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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (3.7L Engine (Service Information)) >> Valve Timing >> Description >> Timing Drive

Timing Drive

WARNING: This page is about a different variant/trim than selected.
Fig 1: Timing Drive System
GC0011840Courtesy of CHRYSLER LLC
1 - RIGHT CAMSHAFT SPROCKET AND SECONDARY CHAIN 6 - PRIMARY CHAIN
2 - SECONDARY TIMING CHAIN TENSIONER (LEFT AND RIGHT SIDE NOT INTERCHANGEABLE) 7 - IDLER SPROCKET
3 - SECONDARY TENSIONER ARM 8 - CRANKSHAFT SPROCKET
4 - LEFT CAMSHAFT SPROCKET AND SECONDARY CHAIN 9 - PRIMARY CHAIN TENSIONER
5 - CHAIN GUIDE (LEFT AND RIGHT SIDE ARE NOT INTERCHANGEABLE)

The timing drive system has been designed to provide quiet performance and reliability to support a non-free wheeling  engine. Specifically the intake valves are non-free wheeling and can be easily damaged with forceful engine rotation if camshaft-to-crankshaft timing is incorrect. The timing drive system consists of a primary chain, two secondary timing chain drives and a counterbalance shaft drive.