Lexus SC300 / Lexus SC400. Manual - part 390

B.

Install connecting rod cap bolts
HINT:

•

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

•

If any one of the connecting rod cap bolts is broken or
deformed, replace it.

(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: 25 N

⋅

m (250 kgf

⋅

cm, 18 ft

⋅

lbf)

If any one 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 bolt with paint.

(d)  Retighten the cap nuts 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.

8. 

CHECK CONNECTING ROD OIL CLEARANCE
Using a dial indicator, measure the thrust clearance while
moving the connecting rod back and forth.

Standard thrust clearance:

0.160 – 0.290 mm (0.0063 – 0.0138 in.)

Maximum thrust clearance:

0.35 mm (0.0138 in.)

If the thrust clearance is greater than maximum, replace the
connecting rod assembly(s). If necessary, replace the crank-
shaft.

Connecting rod thickness:

22.880 – 22.920 mm (0.9008 – 0.9024 in.)

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–183

9. 

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.

•

Using a razor blade and gasket scraper, remove all the
oil packing (FIPG) material from the gasket surfaces and
sealing grooves.

•

Thoroughly clean all components to remove all the
loose material.

•

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

•

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

•

Parts must be  assembled within 5 minutes of
application. Otherwise the material must be removed
and reapplied.

•

Immediately remove nozzle from the tube and reinstall
cap.

(c)  Install a new O–ring to the cylinder block.

(d)  Install the oil seal retainer with the 7 bolts.

Torque: 7.8 N

⋅

m (80 kgf

⋅

cm, 69 in.

⋅

lbf)

EG–184

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1UZ–FE ENGINE

ENGINE MECHANICAL

POST ASSEMBLY

EG24Z–01

(See Components for Cylinder Block Prepation of
 Disassembly and Post Assembly)
1. 

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.

•

Using a razor blade and gasket scraper remove all the
old packing (FIPG) material from the gasket surfaces
and sealing groove.

•

Thoroughly clean all components to remove all the
loose material.

•

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

(b)  Apply seal packing to the seal plate as shown in the

illustration.

Seal packing:

Part No. 08826–00080 or equivalent

•

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

•

Parts must be  assembled within 5 minutes of
application. Otherwise the material must be removed
and reapplied.

•

Immediately remove nozzle from the tube and reinstall
cap.

(c)  Install the seal plate with the 2 nuts. Alternately tighten the

nuts in several passes.

Torque: 14 N

⋅

m (145 kgf

⋅

cm, 10 ft

⋅

lbf)

2. INSTALL 

GENERATOR 

BRACKET

Install the generater bracket with the bolt.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

3. 

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.

•

Using a razor blade and gasket scraper, remove all the
old packing (FIPG) material from the gasket surfaces
and sealing groove.

•

Thoroughly clean all components to remove all the
loose material.

•

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

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–185

(b) Apply 

seal packing to the oil pump as shown in the illustration.

Seal packing:

Part No. 08826–00080 or equivalent

NOTICE: Avoid applying an excessive amount to the sur-
face. Be particularly careful near oil passage.

•

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

•

Parts must be  assembled within 5 minutes of
application. Otherwise the material must be removed
and reapplied.

•

Immediately remove nozzle from the tube and reinstall
cap.

(c)  Install a new O–ring to 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 8 bolts. Uniformly tighten the bolts

in several passes.

Torque:

16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf) for 12 mm head

30 N

⋅

m (310 kgf

⋅

cm, 22 ft

⋅

lbf) for 14 mm head

HINT: Each bolt length is indicated in the illustration.
Bolt length:

50 mm (1.97 in.) for A of 12 mm head
106 mm (4.17 in.) for B of 12 mm head
30 mm (1.18 in.) for C of 12 mm head
40 mm (1.57 in.) for D of 14 mm head

EG–186

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1UZ–FE ENGINE

ENGINE MECHANICAL