Timing Chain: Service and Repair
CAUTION:
- After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike piston heads.
- When installing chain tensioner, oil seats, or other sliding parts, lubricate contacting surfaces with new engine oil.
- Apply new engine oil to bolt threads and seat surfaces when installing camshaft sprocket and crankshaft pulley.
- When removing oil pump assembly, remove camshaft position sensor (PHASE), then remove timing chain from engine.
- Be careful not to damage sensor edges.
Removal
1. Drain engine coolant from radiator and cylinder block. Be careful not to spill coolant on drive belts.
2. Remove the following belts.
- Power steering pump drive belt
- Alternator drive belt
3. Remove front RH wheel.
4. Remove front/right-side splash undercover.
5. Remove front exhaust tube.
6. Disconnect vacuum hoses for:
- EVAP canister
- Brake power booster
- Fuel pressure regulator
7. Remove ignition coils.
8. Remove spark plugs.
9. Remove rocker cover bolts in numerical order as shown in the figure.
10. Set No. 1 piston at TDC on its compression stroke.
- Rotate crankshaft until mating mark on camshaft sprocket is set at position indicated in figure at left.
11. Remove camshaft position sensor (PHASE).
- Do not allow any magnetic materials to contact the camshaft position sensor (PHASE).
- Be careful not to damage sensor.
12. Remove cylinder head front cover.
13. Remove timing chain guide from camshaft bracket.
14. Attach a suitable stopper pin to chain tensioner.
15. Remove chain tensioner.
16. Remove camshaft sprocket bolts.
- Apply paint to timing chain and cam sprockets for alignment during installation.
17. Remove camshaft sprockets.
18. Remove cylinder head bolts at engine front side as shown.
19. Remove oil pan.
20. Remove starter motor, and set ring gear stopper using mounting bolt holes.
21. Remove crankshaft pulley bolt.
22. Remove crankshaft pulley with a suitable puller.
23. Support engine with a suitable hoist or jack.
24. Remove RH engine mounting.
25. Remove RH engine mounting bracket.
26. Remove idler pulley and bracket.
27. Remove water pump pulley and water pump.
28. Remove front cover bolts and front cover as shown.
*1: Located on water pump
*2: Located on power steering pump adjusting bar, remove the bar
- Inspect for oil leakage at front oil seal. Replace seal if oil leak is present.
29. Remove timing chain.
30. Remove oil pump drive spacer.
31. Remove chain guides.
32. Remove crankshaft sprocket.
33. Remove O-rings from cylinder block and front cover.
Inspection
Check for cracks and excessive wear at roller links. Replace if necessary.
Installation
1. Install crankshaft sprocket on crankshaft.
- Make sure mating marks on crankshaft sprocket face front of engine.
2. Position crankshaft so that No. 1 piston is at TDC and crankshaft key is at 12 o'clock.
3. Install slack side timing chain guide and timing chain tension guide.
4. Install timing chain on crankshaft sprocket.
- Set timing chain by aligning its mating mark with that on the crankshaft sprocket.
- Make sure sprocket's mating mark faces engine front.
5. Install camshaft sprockets.
- Set timing chain by aligning mating marks with those of camshaft sprockets.
6. Install camshaft sprocket bolts to correct torque.
- Apply new engine oil to bolt threads and seat surface.
7. Install chain tensioner.
- Before installing chain tensioner, insert a suitable pin into pin hole of chain tensioner.
- After installing chain tensioner, remove the pin.
8. Install timing chain guide.
9. Install O-rings to cylinder block.
10. Before installing front cover, remove all traces of RTV silicone sealant from mating surface using a scraper.
- Also remove traces of RTV silicone sealant from mating surface of cylinder block.
11. Apply a continuous bead of Genuine RTV silicone sealant Part No. 999MP-A7007 or equivalent to mating surface of front cover.
- Check alignment of mating marks on chain and crankshaft sprocket.
- Align oil drive spacer with oil pump.
- Place timing chain to the side of chain guide. This prevents the chain from making contact with water seal area of front cover.
Location
Torque Table
12. Install front cover.
- Make sure two O-rings are present.
- Be careful not to damage oil seal when installing front cover.
13. Install cylinder head bolts at engine front side as shown.
- Tightening procedure
Tighten bolts (1 - 4) to 6.3 to 8.3 Nm (0.64 to 0.85 kg-m, 55.8 to 73.5 inch lbs.).
14. Install oil pump drive spacer.
15. Install water pump and water pump pulley.
16. Install idler pulley and bracket.
17. Install RH engine mounting bracket.
18. Install RH engine mounting.
19. Install oil pan.
20. Install crankshaft pulley.
21. Remove ring gear stopper.
22. Install starter motor.
23. Install cylinder head front cover.
- Apply RTV silicone sealant to cylinder head front cover.
- Use Genuine RTV silicone sealant Part No. 999MP-A7007 or equivalent.
24. Install camshaft position sensor (PHASE).
25. Before installing rocker cover, apply a bead of Genuine RTV silicone sealant Part No. 999MP-A7007 to mating surface of cylinder head as shown.
26. Install rocker cover gasket into rocker cover.
27. Install rocker cover and tighten in numerical order as shown in the figure.
28. Install spark plugs.
29. Install ignition coils.
30. Install front exhaust tube.
31. Install front/right-side splash undercover.
32. Install front RH wheel.
33. Install drive belts.
34. Reinstall parts in reverse order of removal.