Lexus RX300 (MCU15). Service manual - part 466

LU04J–03

B04140

B04141

Mark

B04142

B04143

B04144

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LUBRICATION

OIL PUMP

LU–13

LEXUS RX300   (RM785E)

INSPECTION

1.

INSPECT RELIEF VALVE

Coat the valve with engine oil and check that it falls smoothly
into the valve hole by its own weight.
If it does not, replace the relief valve. If necessary, replace the
oil pump assembly.

2.

PLACE DRIVE AND DRIVEN ROTORS INTO OIL PUMP
BODY

Place the drive and driven rotors into the oil pump body with the
mark facing upward.

3.

INSPECT ROTOR SIDE CLEARANCE

Using a feeler gauge and precision straight edge, measure the
clearance between the rotors and precision straight edge.

Standard side clearance:
0.030 – 0.090 mm (0.0012 – 0.0035 in.)
Maximum side clearance: 0.15 mm (0.0059 in.)

If the side clearance is greater than maximum, replace the ro-
tors as a set. If necessary, replace the oil pump assembly.

4.

INSPECT ROTOR TIP CLEARANCE

Using a feeler gauge, measure the clearance between the drive
and driven rotor tips.

Standard tip clearance:
0.110 – 0.240 mm (0.0043 – 0.0094 in.)
Maximum tip clearance: 0.35 mm (0.0138 in.)

If the tip clearance is greater than maximum, replace the rotors
as a set.

5.

INSPECT ROTOR BODY CLEARANCE

Using a feeler gauge, measure the clearance between the driv-
en rotor and body.

Standard body clearance:
0.250 – 0.325 mm (0.0098 – 0.0128 in.)
Maximum body clearance: 0.30 mm (0.0118 in.)

If the body clearance is greater than maximum, replace the ro-
tors as a set. If necessary, replace the oil pump assembly.

LU04K–02

P12413

P12392

SST

P12475

Cut Position

P12473

SST

LU–14

–

LUBRICATION

OIL PUMP

LEXUS RX300   (RM785E)

REPLACEMENT

REPLACE CRANKSHAFT FRONT OIL SEAL
HINT:
There are 2 methods ((a) and (b)) to replace the oil seal which
are as follows:
(a)

If the oil pump is removed from the cylinder block.
(1)

Using a screwdriver, pry out the oil seal.

(2)

Using SST and a hammer, tap in a new oil seal until
its surface is flush with the oil pump body edge.

SST

09223–00010

(3)

Apply MP grease to the oil seal lip.

(b)

If the oil pump is installed to the cylinder block.
(1)

Using a knife, cut off the oil seal lip.

(2)

Using a screwdriver, pry out the oil seal.

NOTICE:
Be careful not to damage the crankshaft. Tape the screw-
driver tip.

(3)

Apply MP grease to a new oil seal lip.

(4)

Using SST and a hammer, tap in the oil seal until its
surface is flush with the oil pump body edge.

SST

09223–00010

LU04L–02

B04141

Mark

–

LUBRICATION

OIL PUMP

LU–15

LEXUS RX300   (RM785E)

REASSEMBLY

1.

INSTALL DRIVE AND DRIVEN ROTORS

(a)

Place the drive and driven rotors into pump body with the
marks facing the pump body cover side.

(b)

Install the pump body cover with the 10 screws.

2.

INSTALL RELIEF VALVE

Insert the relief valve and spring into the pump body hole, and
install the plug.

Torque: 49.1 N·m (500 kgf·cm, 36 ft·lbf)

LU04M–03

B04145

A

B

C

Seal Width
2 – 3 mm

A

B

C

P18779

New O–Ring

B04146

LU–16

–

LUBRICATION

OIL PUMP

LEXUS RX300   (RM785E)

INSTALLATION

1.

INSTALL OIL PUMP

(a)

Remove any old packing (FIPG) material and be careful
not to drop any oil on the contact surfaces of the oil pump
and cylinder block.

S

Using a razor blade and gasket scraper, remove all
the old packing (FIPG) material from the gasket sur-
faces and sealing grooves.

S

Thoroughly clean all components to remove all the
loose material.

S

Using a non–residue solvent, clean both sealing
surfaces.

(b)

Apply seal packing to the oil pump as shown in the illustra-
tion.
Seal packing: Part No. 08826–00080 or equivalent

S

Install a nozzle that has been cut to a 2 – 3 mm (0.08
– 0.12 in.) opening.

HINT:
Avoid applying an excessive amount to the surface.

S

Parts must be assembled within 3 minutes of ap-
plication. Otherwise the material must be removed
and reapplied.

S

Immediately remove nozzle from the tube and rein-
stall cap.

(c)

Place a new O–ring on the cylinder block.

(d)

Engage the spline teeth of the oil pump drive gear with the
large teeth of the crankshaft, and slide the oil pump on the
crankshaft.

(e)

Install the oil pump with the 9 bolts. Uniformly tighten the
bolts in several passes.
Torque:
10 mm head: 8 N·m (80 kgf·cm, 69 in.·lbf)
12 mm head: 19.5 N·m (200 kgf·cm, 14 ft·lbf)

2.

INSTALL CRANKSHAFT POSITION SENSOR
Torque: 8 N·m (80 kgf·cm, 69 in.·lbf)

3.

INSTALL BAFFLE PLATE TO NO.1 OIL PAN
Torque: 8 N·m (80 kgf·cm, 69 in.·lbf)