Repair Valve Seats; Inspect Camshaft Thrust Clearance; Inspect Camshaft Oil Clearance - Toyota 2002 Camry Service Manual

1.0–1.4mm
1.0–1.4mm
2002 CAMRY REPAIR MANUAL (RM881U)
ENGINE MECHANICAL
10.
NOTICE:
Take off a cutter gradually to make smooth seats.
(a)
45_
30_
A53031
(b)
75_
45_
(c)
(d)
A53032
11.
(a)
(b)
A36626
(c)
12.
(a)
(b)
(c)
A36627
– CYLINDER HEAD ASSY (2AZ–FE)

REPAIR VALVE SEATS

If the seating is too high on the valve face, use 30_ and
45_ cutters to correct the seat.
If the seating is too low on the valve face, use 75_and 45_
cutters to correct the seat.
Hand–lap the valve and valve seat with an abrasive com-
pound.
Check the valve seating position.

INSPECT CAMSHAFT THRUST CLEARANCE

Install the camshafts.
Using a dial indicator, measure the thrust clearance while
moving the camshaft back and forth.
Standard thrust clearance:
Intake 0.040 – 0.095 mm (0.0016 – 0.0037 in.)
Exhaust 0.080 – 0.135 mm (0.0032 – 0.0053 in.)
Maximum thrust clearance:
Intake 0.11 mm (0.0043 in.)
Exhaust 0.15 mm (0.0059 in.)
If the thrust clearance is greater than maximum, replace
the cylinder head. If the thrust surface is damaged, re-
place the camshaft.

INSPECT CAMSHAFT OIL CLEARANCE

Clean the bearing caps and camshaft journals.
Place the camshafts on the cylinder head.
Lay a strip of plastigage across each of the camshaft jour-
nal.
Author :
14–109
Date :
1633