EM1Q6
−
01
Both intake and exhaust
Bushing bore diameter
mm (in.) Bushing size
11.492
−
11.513
(0.4524
−
0.4533)
11.542
−
11.563
(0.4544
−
0.4552)
Use STD
Use O/S 0.05
−
ENGINE MECHANICAL
CYLINDER HEAD
EM
−
49
1996 LAND CRUISER (RM451U)
REPLACEMENT
1.
REPLACE VALVE GUIDE BUSHINGS
(a)
Gradually heat the cylinder head to 80
−
100
°
C (176
−
212
°
F).
(b)
Using SST and a hammer, tap out the guide bushing.
SST
09201
−
10000 (09201
−
01070), 09950
−
70010
(09951
−
07100)
(c)
Using a caliper gauge, measure the bushing bore diame-
ter of the cylinder head.
(d)
Select a new guide bushing (STD or O/S 0.05).
If the bushing bore diameter of the cylinder head is greater than
11.513 mm (0.4533 in.), machine the bushing bore to the follow-
ing dimension:
11.542
−
11.563 mm (0.4544
−
0.4552 in.)
If the bushing bore diameter of the cylinder head is greater than
11.563 mm (0.4552 in.), replace the cylinder head.
(e)
Gradually heat the cylinder head to 80
−
100
°
C (176
−
212
°
F).
(f)
Using SST and a hammer, tap in a new guide bushing un-
til it protrudes 8.2
−
8.6 mm (0.323
−
0.339 in.) from the
cylinder head.
SST
09201
−
10000 (09201
−
01070), 09950
−
70010
(09951
−
07100)
(g)
Using a sharp 7 mm reamer, ream the guide bushing to
obtain the standard specified clearance (See page
EM
−
40
) between the guide bushing and valve stem.
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Version 1.00 - 12/21/2010