Removal and Replacement
Timing Drive Components
Removal
NOTICE: Since the engine is not free-wheeling, the timing procedures must be followed exactly or piston and valve damage can occur.
1. Remove the engine front cover. For additional information, refer to Engine Front Cover Service and Repair.
2. Remove the crankshaft sensor ring from the crankshaft.
3. NOTICE: Unless otherwise instructed, at no time when the timing chains are removed and the cylinder heads are installed may the crankshaft or camshaft be rotated. Severe piston and valve damage will occur.
Position the crankshaft with the keyway at the 12 o'clock position.
4. Scribe a location mark on the back of the balance shaft gear and the camshaft balance shaft drive gear.
5. NOTICE: If the components are to be installed, they must be installed in the same positions or engine damage may occur. Mark the components for installation into their original locations.
Remove the 6 bolts and remove the 3 balance shaft bearing caps.
6. Remove the balance shaft.
7. Install and carefully tighten the Camshaft Position Aligner on the camshafts.
8. NOTICE: If one or both of the tensioner mounting bolts are loosened or removed, the tensioner-sealing bead must be inspected for seal integrity. If cracks, tears, separation from the tensioner body or permanent compression of the seal bead is observed, install a new tensioner or engine damage may occur.
Remove the 2 bolts, the LH timing chain tensioner and tensioner arm.
9. NOTICE: If one or both of the tensioner mounting bolts are loosened or removed, the tensioner-sealing bead must be inspected for seal integrity. If cracks, tears, separation from the tensioner body or permanent compression of the seal bead is observed, install a new tensioner or engine damage may occur.
Remove the 2 bolts, the RH timing chain tensioner and tensioner arm.
10. Remove the LH and RH timing chains and the crankshaft sprockets.
11. Remove the 4 bolts and the timing chain guides.
12. Remove the 2 bolts, flat washers, camshaft sprockets and RH camshaft spacer.
Installation
NOTICE: Timing chain procedures must be followed exactly or damage to valves and pistons will result.
1. NOTICE: Prior to installation, inspect the tensioner-sealing bead for seal integrity. If cracks, tears, separation from the tensioner body or permanent compression of the seal bead is observed, install a new tensioner. Failure to follow these instructions may result in engine damage.
Compress the tensioner plunger, using a vise.
2. Install a retaining clip on the tensioner to hold the plunger in during installation.
3. NOTE: There are 61 links in each timing chain.
If copper links are not visible, mark 2 links on one end and 1 link on the other end, and use as timing marks.
4. Install the RH camshaft spacer ring, both camshaft sprockets, flat washers and tighten the bolts in 2 stages.
- Stage 1: Tighten to 40 Nm (30 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
5. Install the timing chain guides and the 4 bolts.
- Tighten to 10 Nm (89 lb-in).
6. NOTE: Slightly loosen the Camshaft Position Aligner to allow slight camshaft movement.
Preposition the camshafts.
1. Rotate the LH camshaft until the timing mark is approximately at 12 o'clock.
- Tighten the Camshaft Position Aligner to maintain camshaft prepositioning.
2. Rotate the RH camshaft until the timing mark is approximately at 11 o'clock.
- Tighten the Camshaft Position Aligner to maintain camshaft prepositioning.
7. NOTICE: Rotate the crankshaft counterclockwise only. Do not rotate past the position shown or severe piston and/or valve damage may occur.
Position the crankshaft with the Crankshaft Holding Tool, then remove the tool.
8. Install the crankshaft sprocket, making sure the flange faces forward.
9. Install the lower end of the LH timing chain, aligning the timing marks.
10. Install the LH timing chain on the camshaft sprocket with the 2 chain (marked) links and the timing marks aligned.
11. NOTICE: The camshaft sprocket can jump time causing engine damage if the Crankshaft Holding Tool is not secured.
NOTE: Be sure the chain link and crankshaft sprocket timing marks are aligned.
NOTE: The lower half of the timing chain must be positioned above the dowel.
Install the RH (outer) timing chain on the crankshaft sprocket.
12. Position the timing chain on the camshaft sprocket. Make sure the 2 blue-colored (marked) links align with the camshaft sprocket timing mark.
13. NOTE: The LH timing chain tensioner arm has a bump near the dowel hole, for identification.
Position the LH and RH timing chain tensioner arms on the dowel pins and install the timing chain tensioners and the 4 bolts.
- Tighten to 25 Nm (18 lb-ft).
14. Remove the retaining clips from the RH and LH timing chain tensioners.
15. Check for correct alignment of all timing marks.
16. Remove the Camshaft Position Aligner from the camshafts.
17. Install the crankshaft sensor ring on the crankshaft.
18. Lubricate the balance shaft journals with clean engine oil.
19. Position the balance shaft on the journals.
20. Align the scribed mark on the balance shaft with the camshaft balance shaft drive gear scribe mark as shown.
21. Install the bearing caps in their original locations and tighten the 6 bolts in the sequence shown.
- Tighten to 10 Nm (89 lb-in).
22. Install engine front cover. For additional information, refer to Engine Front Cover Service and Repair.