Lexus SC300 / Lexus SC400. Service manual — part 358

31. REMOVE CRANKSHAFT PULLEY
(a) Using SST, remove the pulley bolt.

SST 09213–70010, 09330–00021

(b) Using SST, remove the crankshaft pulley.

SST 09213–31021

32. REMOVE HYDRAULIC PUMP

HINT (When re–using timing belt): Before removing the hy-
draulic pump, using the crankshaft pulley bolt, turn the crank-
shaft pulley and align the installation mark of the timing belt
with the end of the hydraulic pump.

(a) Disconnect the solenoid valve connector.
(b) Remove the 2 bolts and 2 nuts.
(c) Disconnect the crankshaft position sensor wire clamp.
(d) Remove the hydraulic pump.

33. REMOVE NO.1 TIMING BELT COVER

Remove the 4 bolts, timing belt cover and gasket.

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ENGINE MECHANICAL

EG–55

34. REMOVE TIMING BELT COVER SPACER

Remove the belt cover spacer and gasket.

35. REMOVE TIMING BELT GUIDE (CRANKSHAFT ANGLE

SENSOR PLATE)

36. REMOVE TIMING BELT

HINT (When re–using timing belt): If the installation marks
have disappeared, place a new installation mark on the tim-
ing belt to the match the dot mark of the crankshaft timing
pulley.

37. REMOVE NO.2 IDLER PULLEY

Remove the bolt and idler pulley.

38. REMOVE NO.1 IDLER PULLEY

Using a 10 mm hexagon wrench, remove the bolt, idler pulley
and plate washer.

EG–56

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ENGINE MECHANICAL

39. REMOVE CRANKSHAFT TIMING PULLEY

Using SST, remove the timing pulley.
SST 09213–60017 (09213–00050)

EG1KH–02

TIMING BELT COMPONENTS
INSPECTION

1.

INSPECT TIMING BELT

NOTICE:

•

Do not bend, twist or turn the timing belt inside out.

•

Do not allow the timing belt to come into contact with oil,

water or steam.

•

Do not utilize timing belt tension when installing or

removing the mounting bolt of the camshaft timing

pulley.

If there are any defects as shown in the illustration, check the
following points:

(a) Premature

parting

•

Check the proper installation.

•

Check the timing cover gasket for damage and proper
installation.

(b) If

the belt teeth are cracked or damaged, check to see if either

camshaft or water pump is locked.

(c) If there is noticeable wear or cracks on the belt face, check

to see if there are nicks on the side of the idler pulley lock.

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ENGINE MECHANICAL

EG–57

(d) If there is wear or damage on only one side of the belt, check

the belt guide and the alignment of each pulley.

(e) If there is noticeable wear on the belt teeth, check the timing

cover for damage, gasket has been installed correctly, and
the foreign material on the pulley teeth. If necessary, replace
the timing belt.

2.

INSPECT IDLER PULLEYS
Check that the idler pulley turns smoothly.
If necessary, replace the idler pulley.

3.

INSPECT TIMING BELT TENSIONER

(a) Visually check tensioner for leakage.

HINT: If there is only the faintest trace of oil on the seal on the
push rod side, the tensioner is all right.
If leakage is found, replace the tensioner.

(b) Hold the tensioner with both hands, and push the push rod

firmly against floor or wall to check that it doesn’t move.
If push rod moves, replace the tensioner.

EG–58

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ENGINE MECHANICAL