Timing Belt: Service and Repair
Toothed belt, removing and installingRemoving
- Remove engine cover (arrows).
- Remove noise insulation panel (arrows).
- Remove front bumper. Refer to Body and Frame/Bumper/Service and Repair [1][2]Procedures
- Move lock carrier to service position. Refer to Body and Frame/Radiator Support/Service and Repair [1][2]Procedures
- Remove ribbed belt. Refer to Engine/Drive Belts, Mounts, Brackets and Accessories/Drive Belt/Serpentine Belt/Service and Repair Service and Repair
CAUTION: Mark the running direction of the belt with a crayon or marker before removing. Reinstalling a used belt in reversed running direction could damage the belt.
- Unclip toothed belt guard on both sides and remove.
- Turn crankshaft by hand to TDC.
Marks -A- and -B- must align
- Check position of camshafts.
Larger holes (arrow) of securing plates on camshaft sprockets must be on inside and must align
If they are not in this position:
Turn crankshaft one revolution further.
- Remove sealing plug from left-side of cylinder block.
Top Dead Center (TDC) mark on crankshaft must be visible or can be felt
Crankshaft Holder 3242 Shown In Installed Position:
- Install 3242 crankshaft holder into opening.
- Remove tensioner for ribbed belt.
- Remove center and left belt guards.
Notes: The toothed belt tensioner is oil-dampened. Compress it by slowly applying constant pressure.
Use spring clamp from 2024A.
- Using 8 mm hex wrench, turn toothed belt tensioning roller -1- counter-clockwise, opposite direction shown (arrow), until tensioning lever -2- compresses tensioner -3- so that spring clamp (2 mm dia.) can be inserted into bore and lifter.
- Insert pin and release tension.
- Remove vibration dampener. Refer to Engine/Cylinder Block Assembly/Harmonic Balancer/Service and Repair Service and Repair
- Remove idler for ribbed belt and guard under vibration dampener (arrows).
- Remove toothed belt.
CAUTION: Mark the running direction of the belt with a crayon or marker before removing. Reinstalling a used belt in reversed running direction could damage the belt.
Installing
- Install 3391 camshaft locator bar into locking plates of camshafts.
- Loosen bolts of both camshafts and back out bolts approx. 5 turns.
- Remove 3391 camshaft locator bar.
- Remove both camshaft sprockets using T40001.
- Reinstall both camshaft sprockets together with locking plates and hand-tighten.
Note: The camshaft sprockets should be loose enough to be turned but not so loose as to be out of alignment.
- Install toothed belt on all sprockets as shown.
- Install 3391 camshaft holding bar.
- Using 8 mm hex wrench, turn toothed belt tensioning roller -1- counter-clockwise, opposite direction shown (arrow), until tensioning lever -2- compresses tensioner -3- so that spring clamp (2 mm dia) can be removed and then remove clamp.
Before starting engine, pre-load timing tensioning roller as follows:
Using a torque wrench with 8 mm hex bit, apply tension to toothed belt clockwise in direction shown (arrow) until a torque of 15 Nm is attained. This ensures tensioner has expanded completely and is properly engaging toothed belt.
