Dodge Nitro. Manual — part 59
Fig. 175: Camshaft Sprocket V6 Marks (#1 TDC, Exhaust Stroke)
Courtesy of CHRYSLER LLC
4. Re-index the camshaft drive gear in the chain until the V6 mark is at the same position as the V6 mark on
the opposite camshaft drive gear. See Fig. 175(1,2).
5. Using the Camshaft Holder 8428, rotate the camshaft until the alignment dowel on the camshaft is
aligned with the slot in the camshaft drive gear.
6. Position the camshaft drive gear onto the camshaft, remove oil from bolt then install the retaining bolt.
Using Special Tools, Spanner Wrench 6958 with Adapter Pins 8346 and a suitable torque wrench,
Tighten the retaining bolt to 122 N.m (90 ft. lbs.)
7. Remove the Wedge Locking Tool 8379.
8. Rotate the crankshaft two full revolutions, then verify that the camshaft drive gear V6 marks are in fact
aligned.
9. Install the cylinder head covers. Refer to Cylinder Head Cover in this article.
MEASURING TIMING CHAIN WEAR
1 - LEFT CYLINDER HEAD
2 - RIGHT CYLINDER HEAD
CAUTION: Remove excess oil from camshaft sprocket retaining bolt before
reinstalling bolt. Failure to do so may cause over-torqueing of bolt
resulting in bolt failure.
2007 Dodge Nitro R/T
2007 ENGINE 3.7L - Service Information - Nitro
Fig. 176: Checking Secondary Timing Chains for Wear
Courtesy of CHRYSLER LLC
1. Remove the timing chain cover. See REMOVAL.
2. To determine if the secondary timing chains are worn, rotate the engine clockwise until maximum
tensioner piston (2) extension is obtained. Measure the distance between the secondary timing chain
tensioner housing and the step ledge on the piston. The measurement at point (A) must be less than 15mm
(.5906 inches). See Fig. 176.
1 - SECONDARY TENSIONER ARM
2 - SECONDARY CHAIN TENSIONER PISTON
NOTE:
This procedure must be performed with the timing chain cover removed.
2007 Dodge Nitro R/T
2007 ENGINE 3.7L - Service Information - Nitro
3. If the measurement exceeds the specification the secondary timing chains are worn and require
replacement. See REMOVAL.
SHAFT-BALANCE
REMOVAL
BALANCE SHAFT
Fig. 177: Idler Shaft, Counterbalance Shaft Thrust Plate, Counterbalance Shaft Drive Gear & Retaining
Bolt
Courtesy of CHRYSLER LLC
1 - IDLER SHAFT
2007 Dodge Nitro R/T
2007 ENGINE 3.7L - Service Information - Nitro
1. Remove the primary and secondary timing chains. Refer to TIMING CHAIN and SPROCKET.
Remove the retaining bolt (4) from the counterbalance shaft thrust plate (2). See Fig. 177.
Fig. 178: Counterbalance Shaft Removal/Installation Tool
Courtesy of CHRYSLER LLC
2 - COUNTERBALANCE SHAFT THRUST PLATE
3 - COUNTERBALANCE SHAFT DRIVE GEAR
4 - RETAINING BOLT
NOTE:
The balance shaft and gear are serviced as an assembly. Do not attempt to
remove the gear from the balance shaft.
2007 Dodge Nitro R/T
2007 ENGINE 3.7L - Service Information - Nitro
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