Lexus SC300 / Lexus SC400. Manual - part 429

(b)  Disconnect the timing belt from the camshaft timing

pulleys.

29.  REMOVE CAMSHAFT TIMING PULLEYS

Using SST, remove the bolt, timing pulley. Remove the two
timing pulleys.
SST 09278–54012

30.  REMOVE CRANKSHAFT PULLEY

(a)  Using SST, remove the pulley bolt.
SST 90213–70010 and 09330–00021

(b)  Using SST, remove the pulley.
SST 09213–31021

31.  REMOVE HYDRAULIC PUMP

HINT (Re–using timing belt): Before removing the hydraulic
pump, using the crankshaft pulley bolt, turn the crankshaft
pulley and align the installation mark of the timing belt with the
end of the hydraulic pump.

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ENGINE MECHANICAL

Timing Belt

(a)  Disconnect the solenoid valve connector.
(b)  Remove the two mounting bolts and two mounting nuts.
(c)  Disconnect the engine speed sensor wire clamp.
(d)  Remove the hydraulic pump.

32.  REMOVE NO.1 TIMING BELT COVER

Remove the four bolts, timing belt cover and gasket.

33.  REMOVE TIMING BELT COVER SPACER

Remove the cover spacer and gasket.

34.  REMOVE TIMING BELT GUIDE (NO.1 CRANK ANGLE

SENSOR PLATE)

35.  REMOVE TIMING BELT

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

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ENGINE MECHANICAL

Timing Belt

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36.  REMOVE NO.2 IDLER PULLEY

Remove the pulley bolt and idler pulley.

37.  REMOVE NO.1 IDLER PULLEY

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

38.  REMOVE CRANKSHAFT TIMING PULLEY

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

INSPECTION OF TIMING BELT
COMPONENTS

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 illustrations, check
the following points:
(a) Premature 

parting

•

Check for proper installation.

•

Check the timing cover gasket for damage and
proper installation.

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ENGINE MECHANICAL

Timing Belt

(b)  If the belt teeth are cracked or damaged, check to see

if either the camshaft 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 and water pump.

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

check the belt guide and the alignment of the each
pulley.

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

belt cover for damage, correct gasket installation. and
the foreign material on the pulley teeth.

If necessary, replace the timing belt.

2. 

INSPECT IDLER PULLEYS
Check the turning smoothness of the idler pulley.
If necessary, replace the idler pulley.

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ENGINE MECHANICAL

Timing Belt

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