EM3322
EM
−
46
−
ENGINE MECHANICAL
CYLINDER HEAD
1996 LAND CRUISER (RM451U)
(e)
Inspect the gear spring
Using vernier calipers, measure the free distance be-
tween the spring ends.
Free distance: 18.2
−
18.8 mm (0.717
−
0.740 in.)
If the free distance is not as specified, replace the gear spring.
(f)
Inspect the journal oil clearance.
(1)
Clean the bearing caps and camshaft journals.
(2)
Place the camshafts on the cylinder head.
(3)
Lay a strip of Plastigage across each of the cam-
shaft journals.
(4)
Install the bearing caps (See page
EM
−
54
).
NOTICE:
Do not turn the camshaft.
(5)
Remove the bearing caps.
(6)
Measure the Plastigage at its widest point.
Standard oil clearance:
0.025
−
0.062 mm (0.0010
−
0.0024 in.)
Maximum oil clearance: 0.10 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace the cam-
shaft. If necessary, replace the bearing caps and cylinder head
as a set.
(7)
Completely remove the Plastigage.
(g)
Inspect the thrust clearance.
(1)
Install the camshaft (See page
EM
−
54
).
(2)
Using a dial indicator, measure the thrust clearance
while moving the camshaft back and forth.
Standard thrust clearance:
0.030
−
0.080 mm (0.0012
−
0.0031 in.)
Maximum thrust clearance: 0.10 mm (0.0039 in.)
If the thrust clearance is greater than maximum, replace the
camshaft. If necessary, replace the bearing caps and cylinder
head as a set.
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Brought to you by BirfMark
Version 1.00 - 12/21/2010
