Timing Chain: Service and Repair
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TIMING DRIVE COMPONENTS REMOVAL/INSTALLATION - 3.0L
Removal
CAUTION:During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan, may cause engine failure.
CAUTION:Failure to verify correct timing drive component alignment will result in severe engine damage.
1. Remove the engine front cover. See - Service and Repair.
2. Remove the LH and RH spark plugs. See - Service and Repair.
NOTE:This pulse wheel is used in several different engines. Install the pulse wheel with the keyway in the slot stamped "30RFF" (orange in color).
3. Remove the ignition pulse wheel.
4. Install the crankshaft pulley bolt and washer.
5. Rotate the crankshaft clockwise to position the crankshaft keyway in the 11 o'clock position and position the camshafts in the correct position. This will position the number one cylinder at top dead center (TDC).
- Verify that the camshafts are correctly located. If not, rotate the crankshaft one additional turn and re-check.
6. Rotate the crankshaft clockwise 120 degrees to the 3 o'clock position to locate the RH camshafts in the neutral position.
7. Verify that the RH camshafts are in the neutral position.
8. Remove the RH timing chain and tensioner arm.
a. Remove the 2 bolts.
b. Remove the tensioner.
c. Remove the tensioner arm.
9. Remove the 2 bolts and the RH timing chain guide.
- Remove the RH timing chain from the engine.
10. Rotate the crankshaft clockwise 600 degrees (one and two-third turns) to position the crankshaft keyway in the 11 o'clock position. This will position the LH camshafts in the neutral position.
11. Verify that the LH camshafts are in the neutral position.
12. Remove the LH timing chain and tensioner arm.
a. Remove the 2 bolts.
b. Remove the tensioner.
c. Remove the tensioner arm.
13. Remove the 2 bolts and the LH timing chain and timing chain guide.
- Remove the LH timing chain from the engine.
14. Remove the crankshaft pulley bolt and the crankshaft sprockets.
Installation
CAUTION:Failure to verify correct timing drive component alignment will result in severe engine damage.
1. Install the crankshaft sprocket with the timing mark facing out. The timing mark on the LH and RH timing chains will be aligned to this mark during assembly.
NOTE:LH shown, RH side similar.
2. Position the chain tensioner in a soft-jawed vise.
NOTE:LH shown, RH similar.
3. Hold the chain tensioner ratchet lock mechanism away from the ratchet stem with a small pick.
CAUTION:During tensioner compression, do not release the ratchet stem until the tensioner piston is fully bottomed in its bore or damage to the ratchet stem will result.
4. Slowly compress the timing chain tensioner.
5. Retain the tensioner piston with a 1.5 mm (0.06 in) diameter wire or paper clip.
6. If timing marks on the timing chains are not evident, use a permanent-type marker to mark the crankshaft and camshaft timing marks on the LH and RH timing chains.
a. Mark any link to use as the crankshaft timing mark.
b. Starting with the crankshaft timing mark, count 29 links and mark the link.
c. Continue counting to 42 and mark the link.
7. Position the LH timing chain and guide and install the bolts.
- Tighten to 25 Nm {2.5 kgf-m, 18 ft-lbf}.
- Align the marks on the timing chain with the marks on the camshaft and crankshaft sprockets.
8. Install the LH timing chain and tensioner arm and the LH timing chain tensioner.
a. Install the tensioner arm.
b. Position the tensioner.
c. Install the bolt.
i. Tighten to 25 Nm {2.5 kgf-m, 18 ft-lbf}.
9. Install the crankshaft pulley bolt and rotate the crankshaft clockwise 120 degrees until the crankshaft keyway is in the 3 o'clock position.
10. Verify that the RH camshafts are correctly positioned.
11. Position the RH timing chain and chain guide and install the bolts.
- Tighten to 25 Nm {2.5 kgf-m, 18 ft-lbf}.
- Align the marks on the timing chain with the marks on the camshaft and crankshaft sprockets.
12. Install the RH timing chain tensioner and tensioner arm.
a. Install the tensioner arm.
b. Position the tensioner.
c. Install the bolts.
i. Tighten to 25 Nm {2.5 kgf-m, 18 ft-lbf}.
13. Remove the LH and RH timing chain tensioner piston retaining wires.
14. Rotate the crankshaft counterclockwise 120 degrees to top dead center (TDC).
CAUTION:Failure to verify correct timing drive component alignment will result in severe engine damage.
15. Verify the timing with the following steps.
a. There should be 12 chain links between the camshaft timing marks.
b. There should be 27 chain links between the camshaft and crankshaft timing marks.
c. There should be 30 chain links between the camshaft and crankshaft timing marks.
16. Remove the crankshaft pulley bolt and washer.
NOTE:This pulse wheel is used in several different engines. Install the pulse wheel with the keyway in the slot stamped "30RFF" only (orange in color).
17. Install the ignition pulse wheel.
18. Install the LH and RH spark plugs. See - Service and Repair.
19. Install the engine front cover. See - Service and Repair.