Timing Belt Lexus SC II

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1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE AIR CLEANER INLET NO.1
3. DRAIN ENGINE COOLANT
4. REMOVE V-BANK COVER
5. REMOVE INTAKE AIR CONNECTOR PIPE
6. REMOVE ENGINE UNDER COVER
7. DISCONNECT RADIATOR HOSE NO.1
8. DISCONNECT RADIATOR HOSE NO.2
9. DISCONNECT OIL COOLER INLET TUBE NO.1
10. DISCONNECT OIL COOLER OUTLET TUBE NO.1
11. REMOVE AIR CLEANER ASSY
12. REMOVE RADIATOR ASSY Remove the 2 nuts and 2 upper radiator support. Lift out the radiator and cooling fan assembly.
13. REMOVE FAN AND GENERATOR V BELT (See «FAN AND GENERATOR V BELT»(/lexus/sc/ii-2001-2005/remont/cooling-system-mechanical/#fan-and-generator-v-belt) )
14. REMOVE VANE PUMP ASSY Remove the 2 bolts and nut, and the vane pump assembly. HINT: Vane pump assembly should be removed with the hoses connected and then hung with a rope or wire in the body's side.
15. REMOVE GENERATOR ASSY (See «GENERATOR» )
16. DISCONNECT COMPRESSOR AND MAGNETIC CLUTCH HINT: The cooler compressor together with the magnetic clutch should be removed with the low-pressure and high-pressure hoses connected and then hung with a rope or wire in the body's side.
17. REMOVE TIMING CHAIN OR BELT COVER NO.2
18. REMOVE TIMING BELT COVER SUB-ASSY NO.3 LH
19. REMOVE TIMING BELT COVER SUB-ASSY NO.2
20. REMOVE V-RIBBED BELT TENSIONER ASSY
21. REMOVE IDLER PULLEY ASSY
22. REMOVE CRANKSHAFT DAMPER SUB-ASSY Using SST, remove the pulley bolt. SST 09213-70011, 09330-00021 Using SST, remove the crankshaft pulley. SST 09950-50013 (09951-05010, 09952-05010, 09953-05010, 09953-05020, 09954-05021)
23. REMOVE TIMING BELT NO.1 COVER Remove the 4 bots and timing belt cover.
24. REMOVE CRANKSHAFT POSITION SENSOR PLATE
25. REMOVE TIMING BELT If re-using the timing belt, check the installation marks on the timing belt. Check that there are 3 installation marks on the timing belt by turning the crankshaft as shown in the illustration. If the installation marks have disappeared, place a new installation mark on the timing belt before removing each part. Set the No. 1 cylinder to approx. 50° BTDC/compression. Using the crankshaft damper bolt, turn the crankshaft to align the timing marks of the crankshaft timing pulley and oil pump body. Check that the timing marks of the camshaft timing pulleys and timing belt plates aligned. If not, turn the crankshaft 1 revolution (360°). Using the crankshaft damper bolt, turn the crankshaft counterclockwise by approx. 50°. NOTE: If the timing belt is disengaged, having the crankshaft pulley at the wrong angle can cause the piston head and valve head to come into contact with each other when you remove the camshaft timing pulley and camshaft, causing damage. So always set the crankshaft pulley at the correct angle. Alternately loosen the 2 bolts, and remove them, the belt tensioner and dust boot. Using SST, loosen the tension between the camshaft timing pulley (RH bank) and crankshaft timing pulley by slightly turning the camshaft timing pulley (RH bank) counterclockwise. SST 09960-10010 (09962-01000, 09963-00350) Disconnect the timing belt from the timing belt idler No. 1, and remove the timing belt.
26. INSTALL TIMING BELT Check the timing belt idler No. 1 and No. 2. Visually check the seal portion of the idler pulley for oil leakage. If leakage is found, replace the idler. Check that the idler turns smoothly. If necessary, replace the idler. Check the water pump. Visually check the air hole and water hole for coolant leakage. If leakage is found, replace the water pump and timing belt. Turn the pulley, and check that the water pump bearing moves smoothly and quietly. If necessary, replace the water pump. Remove any oil or water on the crankshaft pulley, oil pump pulley, water pump pulley, idler No.1 and idler No.2, and keep them clean. NOTE: Only wipe the pulleys; do not use any cleansing agent. Set the No. 1 cylinder to TDC/compression. Turn the hexagon wrench head portion of the camshaft to align the timing marks of the camshaft timing pulleys and timing belt plates aligned. HINT: Setting positions of the camshaft timing pulleys by turning them slightly clockwise makes it easy to install the timing belt: Camshaft timing pulley of LH bank: 1/2 teeth Camshaft timing pulley of RH bank: 1 tooth Using the crankshaft damper bolt, turn the crankshaft to align the timing marks of the crankshaft timing pulley and oil pump body. Install the timing belt. Remove any oil or water on the each pulley, and keep them clean. NOTE: Only wipe the pulleys; do not use any cleansing agent. Face the front mark (arrow) on the timing belt forward. Connect the timing belt to the crankshaft timing pulley. Align the installation mark on the timing belt with the timing mark of the crankshaft timing pulley. Connect the timing belt to the idler No. 2. Connect the timing belt to the camshaft timing pulley (LH.bank). Align the installation mark on the timing belt with the timing mark of the camshaft timing pulley. Connect the timing belt to the water pump pulley. Connect the timing belt to the camshaft timing pulley (RH bank). Align the installation mark on the timing belt with the timing mark of the camshaft timing pulley. Connect the timing belt to the idler No.1. Set the belt tensioner. Using a press, slowly press in the push rod using 981 - 9,807 N (100 - 1,000 kgf, 220 - 2,205 lbf) of pressure. Align the holes of the push rod and housing, pass a 1.27 mm hexagon wrench through the holes to keep the setting position of the push rod. Release the press. Install the dust boot to the belt tensioner. Install the belt tensioner. Temporarily install the belt tensioner with the 2 bolts. Alternately tighten the 2 bolts. Torque: 26 N.m (270 kgf.cm, 19 ft.lbf) Using pliers, remove the 1.27 mm hexagon wrench from the belt tensioner. Check the valve timing. Using the crankshaft damper bolt, slowly turn the crankshaft pulley 2 revolutions from TDC to TDC. NOTE: Always turn the crankshaft pulley clockwise. Check that each pulley aligns with the timing marks as shown in the illustration. If the timing marks do not align, remove the timing belt and reinstall it. Remove the crankshaft damper bolt.
27. INSTALL CRANKSHAFT POSITION SENSOR PLATE Install the crank shaft position sensor plate as shown in the illustration. NOTE: Take care not to install it in the wrong direction. INSTALL TIMING BELT NO.1 COVER Install the timing belt cover with the 4 bolts. Torque: 7.5 N.m (80 kgf.cm, 66 in..lbf)
28. INSTALL CRANKSHAFT DAMPER SUB-ASSY Using SST and a hammer, tap in the crankshaft damper. SST 09223-46011 Using SST, install the damper bolt. SST 09213-70011, 09330-00021 Torque: 245 N.m (2,500 kgf.cm, 181 ft.lbf) Align the damper set key with the key groove of the crankshaft damper.
29. INSTALL IDLER PULLEY ASSY Install the idler with the 2 bolts and 2 nuts. Torque: 16 N.m (160 kgf.cm, 12 ft.lbf) for 12 mm head 32 Nm (330 kgf.cm, 24 ft.lbf) for 14 mm head HINT: Each bolt length is indicated in the illustration. Bolt Length: 106 mm (4.17 in.) for 12 mm head (A) 114 mm (4.49 in.) for 14 mm head (B)
30. INSTALL V-RIBBED BELT TENSIONER ASSY Install the belt tensioner with the bolt and 2 nuts. Torque: 15.5 N.m (160 kgf.cm, 11 ft.lbf) HINT: Use a bolt 106 mm (4.18 in.) in length.
31. INSTALL TIMING BELT COVER SUB-ASSY NO.2 Fit the timing belt cover, matching the claws and pin with each part. Install the timing belt cover with the 2 bolts. Torque: 16 N.m (160 kgf.cm, 12 ft.lbf) HINT: Use bolts 106 mm (4.17 in.) in length.
32. INSTALL TIMING BELT COVER SUB-ASSY NO.3 LH Torque: 7.5 N.m (80 kgf.cm, 66 in..lbf)
33. INSTALL TIMING CHAIN OR BELT COVER NO.2 Torque: 7.5 N.m (80 kgf.cm, 66 in..lbf)
34. INSTALL COMPRESSOR AND MAGNETIC CLUTCH Install the cooler compressor, stay and wire bracket with the 3 bolts and nut. Torque: 49 N.m (500 kgf.cm, 36ft.lbf) for bolts 29 N.m (300 kgf.cm, 21 ft.lbf) for nuts
35. INSTALL GENERATOR ASSY (See «GENERATOR» )
36. INSTALL VANE PUMP ASSY Install the vane pump assembly with the 2 bolts and nut. Alternately tighten the bolts and nut. Torque: 39.2 N.m (400 kgf.cm, 29 ft.lbf) for bolts 43.1 N.m (440 kgf.cm, 32 ft.lbf) for nuts
37. INSTALL FAN AND GENERATOR V BELT (See «FAN AND GENERATOR V BELT»(/lexus/sc/ii-2001-2005/remont/cooling-system-mechanical/#fan-and-generator-v-belt) )
38. INSTALL RADIATOR ASSY Install the radiator and cooling fan assembly with the 2 upper radiator supports and 2 nuts. Torque: 13.5 N.m (135 kgf.cm, 10 ft.lbf)
39. INSTALL AIR CLEANER ASSY Torque: 5.0 N.m (50 kgf.cm, 41 in..lbf)
40. INSTALL AIR CLEANER INLET NO.1 Torque: 5.0 N.m (50 kgf.cm, 41 in..lbf)
41. INSTALL INTAKE AIR CONNECTOR PIPE Torque: 5.0 N.m (50 kgf.cm, 41 in..lbf)
42. INSTALL V-BANK COVER Torque: 5.0 N.m (50 kgf.cm, 41 in..lbf)
43. REFILL ENGINE COOLANT (See «REPLACEMENT»(/lexus/sc/ii-2001-2005/remont/cooling-system-mechanical/#engine-coolant) )
44. CHECK FOR ENGINE COOLANT LEAKS
45. INSTALL ENGINE UNDER COVER

See also:
• FAN AND GENERATOR V BELT
• REPLACEMENT