2003 LEXUS LS430 cylinder head

Fig. 185: Applying Seal Packing To Cylinder Heads

If necessary, replace the water pump.
27. Remove any oil or water on the crankshaft damper, oil pump pulley, water pump pulley, idler No. 1 and
idler No. 2. Keep them clean.
Fig. 196: Checking Water Pump

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28. Set the No. 1 cylinder to TDC/compression.
1. Turn the hexagon wrench head portion of the camshaft to align the timing marks of the camshaft
timing pulleys and timing belt plates.

46.INSTALL OIL COOLER OUTLET TUBE NO.1
47.INSTALL OIL COOLER INLET TUBE NO.
48.INSTALL AIR CLEANER INLET NO.1
Torque: 5.0 N.m (51 kgf.cm, 44 in.lbf)
49.INSTALL INTAKE AIR CONNECTOR PIPE
Torque: 5.0 N.m (51 kgf.cm, 44 in.lbf)
50.INSTALL V-BANK COVER
Torque: 5.0 N.m (51 kgf.cm, 44 in.lbf)
51.REFILL ENGINE COOLANT (See REPLACEMENT
)
52.CHECK FOR ENGINE COOLANT LEAKS (See ON
-VEHICLE INSPECTION )
53.INSTALL ENGINE UNDER COVER NO.1
54.CONNECT BATTERY NEGATIVE TERMINAL
REPLACEMENT
1.REMOVE TIMING BELT (See REPLACEMENT
)
2.REMOVE CYLINDER HEAD COVER SUB-ASSY (See REPLACEMENT
)
3.PISTON & VALVE BREAK PREVENT WORK
a. Turn the crankshaft timing pulley counterclockwise by 45° and match the cut part with the
illustrated position.
HINT:
When the No. 1 cylinder is positioned at 45° BTDC, the valve and piston do not interfere with each other
even when the valve is fully open.

Fig. 232: Installing Bolts Using SST
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1. Apply engine oil to the cam and gear of the camshaft and also the journal of the cylinder head.
2. Align the timing marks (1 dot mark each) of the camshaft drive and driven main gears, and place
the intake and exhaust camshafts.
3. Set the timing mark (1 dot mark each) of the camshaft drive and driven main gears at an angle of
approximatel
y 10°.

Fig. 235: Installing Camshaft Housing Plug
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5. Install the camshaft housing plug to the cylinder head as shown in the illustration.
6. Install the oil control valve filter to the cylinder head.

Fig. 236: Applying Seal Packing To Front Bearing Cap
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7. Apply seal packing to the front bearing cap.
Remove any old packing (FIPG) material and be careful not to drop any oil on the contact
surfaces of the bearing cap and cylinder head.
Using a razor blade and gasket scraper, remove all the old packing (FIPG) material from the
gasket surfaces and groove.
Thoroughly clean all components to remove all loose material.
Using a non-residue solvent, clean both sealing surfaces.
Apply seal packing to the bearing cap as shown in the illustration.
Install a nozzle that has been cut to a 1.5 mm (0.059 in.) opening.
Parts must be assembled within 5 minutes of application. Otherwise the material must be
removed and reapplied.
Immediately remove the nozzle from the tube and reinstall the cap.
Seal packing: Part No. 08826-00080 or equivalent

Fig. 241: Installing Camshaft Timing Pulley
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13.INSTALL CAMSHAFT TIMING PULLEY
a. Align the camshaft timing tube knock pin with the knock pin groove of the timing pulley.
b. Attach the timing pulley to the camshaft timing tube. Face the timing pulley's "R" mark forward.
c. Hold the hexagon wrench head portion of the camshaft, and install the 4 pulley bolts.
Torque: 7.5 N.m (77 kgf.cm, 66 in..lbf)
14.INSTALL CYLINDER HEAD COVER SUB-ASSY (See REPLACEMENT
)
15.INSTALL TIMING BELT (See REPLACEMENT
)
REPLACEMENT
1.REMOVE TIMING BELT (See REPLACEMENT
)
2.REMOVE CYLINDER HEAD COVER SUB-ASSY LH (See REPLACEMENT
)

Fig. 247: Mounting Hexagon Wrench Head Portion Of Intake Camshaft In A Vise
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d. Uniformly loosen the 22 bearing cap bolts in several passes in the sequence shown in the
illustration.
e. Remove the 22 bearing cap bolts, 4 seal washers, oil feed pipe, 9 bearing caps, camshaft housing
plug, oil control valve filter and 2 camshafts.
f. Do not pry the camshaft with a tool by applying excessive force to it.
g. Do not damage the reception part of the thrust on the cylinder head side.