Lexus RX300 (MCU15). Service manual — part 457

P12586

8

7

6

1

5

2

3

4

A05268

Front Mark
(2 Cavities)

Front Mark
(1 Cavity)

RH piston:

LH piston:

P12699

P12801

Front

Protrusion

EM–112

–

ENGINE MECHANICAL

CYLINDER BLOCK

LEXUS RX300 (RM785E)

9.

INSTALL HEXAGON HEAD MAIN BEARING CAP
BOLTS

(a)

Install a new seal washer to the main bearing cap bolt.

(b)

Install and uniformly tighten the 8 main bearing cap bolts
in several passes, in the sequence shown.
Torque: 27 N·m (275 kgf·cm, 20 ft·lbf)

(c)

Check that the crankshaft turns smoothly.

10.

CHECK CRANKSHAFT THRUST CLEARANCE
(See page EM–90)

11.

INSTALL PISTON AND CONNECTING ROD
ASSEMBLES

Using a piston ring compressor, push the correctly numbered
piston and connecting rod assemblies into each cylinder with
the front mark of the piston facing forward.
HINT:
The shape of the piston varies for the RH and LH banks. The
RH piston is marked with ”R”, the LH piston with ”L”.

12.

PLACE CONNECTING ROD CAP ON CONNECTING
ROD

(a)

Match the numbered connecting rod cap with the con-
necting rod.

(b)

Align the pin dowels of the connecting rod cap with the
pins of the connecting rod, and install the connecting rod.

(c)

Check that the protrusion of the connecting rod cap is fac-
ing in the correct direction.

13.

INSTALL CONNECTING ROD CAP BOLTS

HINT:

S

The connecting rod cap bolts are tightened in 2 progres-
sive steps (steps (b) and (d)).

S

If any of the connecting rod cap bolts is broken or de-
formed, replace it.

P12697

P25743

Painted Mark

Front

90

°

90

°

P12911

Seal Width
2 – 3 mm

A

B

A

B

–

ENGINE MECHANICAL

CYLINDER BLOCK

EM–113

LEXUS RX300 (RM785E)

(a)

Apply a light coat of engine oil on the threads and under
the heads of the connecting rod cap bolts.

(b)

Install and alternately tighten the 2 connecting rod cap
bolts in several passes.
Torque: 24.5 N·m (250 kgf·cm, 18 ft·lbf)

If any of the connecting rod cap bolts does not meet the torque
specification, replace the connecting rod cap bolts.

(c)

Mark the front of the connecting cap bolts with paint.

(d)

Retighten the cap bolts by 90

° as shown.

(e)

Check that the painted mark is now at a 90

° angle to the

front.

(f)

Check that the crankshaft turns smoothly.

14.

CHECK CONNECTING ROD THRUST
CLEARANCE (See page EM–90)

15.

INSTALL REAR OIL SEAL RETAINER

(a)

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

S

Using a razor blade and gasket scraper, remove all
the oil 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 seal retainer as shown in the
illustration.
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.

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)

Install the oil seal retainer with the 6 bolts Uniformly tight-
en the bolt in several passes, in the sequence shown.
Torque: 8.0 N·m (80 kgf·cm, 69 in.·lbf)

16.

2WD:
INSTALL CYLINDER BLOCK SIDE COVER

Install a new gasket and the cylinder block side cover with the
3 bolts and 2 nuts.

Torque: 9.0 N·m (90 kgf·cm, 78 in.·lbf)

P12477

Seal Packing

Z09223

Seal Width
3 – 5 mm

A

B

A

B

EM–114

–

ENGINE MECHANICAL

CYLINDER BLOCK

LEXUS RX300 (RM785E)

17.

INSTALL ENGINE COOLANT DRAIN UNION(S)

(a)

Apply seal packing to 2 or 3 threads.
Seal packing: Part No. 08826–00100 or equivalent

(b)

Install the drain union.
Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)

HINT:
After applying the specified torque, rotate the drain union clock-
wise until its drain port is facing downward.
18.

INSTALL WATER SEAL PLATE

(a)

Remove any old packing (FIPG) material and be careful
not to drop any oil on the contact surfaces of the seal plate
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 groove.

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 seal plate as shown in the il-
lustration.
Seal packing: Part No. 08826–00100 or equivalent

S

Install a nozzle that has been cut to a 3 – 5 mm (0.12
– 0.20 in.) opening.

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)

Install the seal plate with the 2 nuts.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)

19.

INSTALL OIL FILTER UNION
Torque: 30 N·m (310 kgf·cm, 22 ft·lbf)

20.

INSTALL OIL FILTER
(See page LU–3)

21.

INSTALL OIL PUMP
(See page LU–16)

22.

INSTALL NO.1 OIL PAN
(See page LU–16)

23.

INSTALL OIL STRAINER
(See page LU–16)

24.

INSTALL NO.2 OIL PAN
(See page LU–16)

25.

INSTALL WATER PUMP
(See page CO–9)

26.

INSTALL WATER INLET HOUSING

(a)

Remove any old packing (FIPG) material and be careful
not to drop any oil on the contact surfaces of the water in-
let housing and cylinder block.

P12909

Seal Width 3 – 5 mm

A05253

4

2

5

7

9

3

1

6

8

10

P12389

SST

–

ENGINE MECHANICAL

CYLINDER BLOCK

EM–115

LEXUS RX300 (RM785E)

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 water inlet housing as shown in
the illustration.
Seal packing: Part No. 08826–00100 or equivalent

S

Install a nozzle that has been cut to a 3 – 5 mm (0.12
– 0.20 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)

Install the water inlet housing with the 8 bolts and 2 nuts.
Uniformly tighten the bolts and nuts in several passes, in
the sequence shown.
Torque: 8.0 N·m (80 kgf·cm, 69 in.·lbf)

(d)

Connect the No. 2 water temperature switch connector.

(e)

Connect the engine wire clamp to the water inlet.

(f)

Install the engine wire band.

(g)

Install the engine wire clamp.

27.

INSTALL KNOCK SENSORS

(a)

Using SST, install the 2 knock sensors.
SST

09816–30010

Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)

(b)

Connect the 2 knock sensor connectors.

28.

INSTALL NO. 2 IDLER PULLEY BRACKET
Torque: 28 N·m (290 kgf·cm, 21 ft·lbf)

29.

INSTALL A/C COMPRESSOR HOUSING BRACKET
Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)