Lexus SC300 / Lexus SC400. Manual — part 373

(f)

Install the other 4 bearing caps in the sequence shown with
the arrow marks facing rearward.
HINT: Align the arrow marks at the front and rear of the cylin-
der head with the mark on the bearing cap.

(g) Apply a light coat of engine oil on the threads and under the

heads (A only) of the bearing cap bolts.
HINT: Do not apply engine oil under the heads of the bearing
cap bolt (B).

(h) Install a new seal washer to the bearing cap bolt (B).

Install the 8 bearing cap bolts as shown.
HINT:

•

Use bearing cap bolts 38 mm (1.50 in.) in length. The
bolts are black (A) or silver (B) in color. Install the 2 silver
bolts to the front bearing cap. Install the 6 black bolts to
the other positions.

•

After installing the oil feed pipe, install the 2 bolts to rear
bearing cap as directed in step B (i).

(i)

Uniformly tighten the 8 bearing cap bolts in several passes,
in the sequence shown.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

B. Install exhaust camshaft to RH cylinder head
(a) Set the timing mark (1 dot mark) of the camshaft drive gear

at 10

angle by turning the hexagon wrench head portion of

the intake camshaft with a wrench.

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EG–115

(b) Apply MP grease to the thrust portion of the exhaust

camshaft.

(c) Align the timing marks (1 dot mark) of the camshaft drive and

driven gears.

(d) Place the exhaust camshaft on the cylinder head.

(e) Check that the exhaust camshaft moves smoothly in the

thrust direction.

(f)

Install the rear bearing cap (mark “E1”) with the arrow mark
facing rearward.
HINT:

•

Installing the rear bearing cap will determine the thrust
portion of the camshaft.

•

Align the allow marks at the front and rear of the cylinder
head with the mark on the bearing cap.

(g) Install the other 3 bearing caps in the sequence shown with

the arrow marks facing rearward.
HINT: Align the arrow marks at the front and rear of the cylin-
der head with the mark on the bearing cap.

(h) Apply a light coat of engine oil on the threads and under the

heads of the bearing cap bolts.

(i)

Install the oil feed pipe and 10 bolts.
HINT: Use bearing cap bolts 38 mm (1.50 in.) and 52 mm
(2.05 in.) in length. Use black colored 38 mm (1.50 in.) bolts.
Install the two 52 mm (2.05 in.) bolts in outside positions of
the oil feed pipe. Install the eight 38 mm (1.50 in.) bolts in the
other positions.

EG–116

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ENGINE MECHANICAL

(j) Uniformly tighten the 8 bolts on the bearing caps of the

exhaust camshaft in several passes, in the sequence shown.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

(k) Alternately tighten the 2 bolts on the rear bearing caps of the

intake camshaft in several passes.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

(l) Boring

the

service bolt installed in the driven subgear upward

by turning the hexagon wrench head portion of the camshaft
with a wrench.

(m) Remove the service bolt.

C. Install intake camshaft to LH cylinder head
(a) Apply MP grease to the thrust portion of the intake camshaft.
(b) Place the intake camshaft at 60

angle of the timing mark (1

dot mark) on the cylinder head.

(c) Remove any old packing (FIPG) material.
(d) Apply seal packing to the bearing cap (mark “11”) as shown.

Seal packing:

Part No. 08826–00080 or equivalent

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(e) Install the front bearing cap (mark “11”) with the arrow mark

facing forward.
HINT:

•

Installing the front bearing cap will determine the thrust
portion of the camshaft.

•

Align the allow marks at the front and rear of the cylinder
head with the mark on the bearing cap.

(f)

Install the other 4 bearing caps in the sequence shown with
the arrow marks facing rearward.
HINT: Align the arrow marks at the front and rear of the cylin-
der head with the mark on the bearing cap.

(g) Apply a light coat of engine oil on the threads and under the

heads (A only) of the bearing cap bolts.
HINT: Do not apply engine oil under the heads of the bearing
cap bolt (B).

(h) Install a new seal washer to the bearing cap bolt (B).

Install the 8 bearing cap bolts as shown.
HINT:

•

Use bearing cap bolts 38 mm (1.50 in.) in length. The
bolts are black (A) or silver (B) in color. Install the 2 silver
bolts to the front bearing cap. Install the 6 black bolts to
the other positions.

•

After installing the oil feed pipe, install the 2 bolts to the
bearing cap 2nd from the front as directed in step B (i).

(i)

Uniformly tighten the 8 bearing cap bolts in several passes,
in the sequence shown.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

EG–118

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1UZ–FE ENGINE

ENGINE MECHANICAL