SERVICE STANDARDS
ENGINE OVERHAUL
MANIFOLD
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Distortion limit
CYLINDER HEAD
mm (in.)
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Bottom surface distortion limit mm (in.)
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0.15 (0.0059)
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IN manifold mounting surface distortion limit
mm (in.)
1
0.20 (0.008)
I
I
EX manifold mounting surface distortion limit mm (in.)
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0.20 (0.008)
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EX 0.4 (0.016)
VALVE GUIDE BUSHING
Valve seat
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Inside diameter mm (in.)
1
8.01 to 8.03 (0.3154 to 0.3161)
1
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Protrusion from head top surface
mm (in.)
(
16.6
k
0.4 (0.654
+
0.016)
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Contact width mm (in.)
Contact angle
VALVE SPRING
IN 1.2 to 1.6 (0.0472 to 0.0630)
EX 1.6 to 2.0 (0.0630 to 0.0787)
45"
VALVE
IN 108.54 (4.2732)
Standard
EX 108.24 (4.2614)
Overall length mm (in.)
IN 107.90 (4.2480)
Limit
EX 107.60 (4.2362)
Overall length mm (in.)
IN
7.97 to 7.99 (0.3138 to 0.3146)
Stem outside diameter mm (in.)
EX
7.96 to 7.97 (0.31 34 to 0.31 38)
0.02 to 0.06 (0.0008 to 0.0024)
Standard
Valve guide bushing oil clearance
0.04 to 0.07 (0.0016 to 0.0028)
mm (in.) 0.1 0 (0.0039)
Limit
EX 0.12 (0.0047)
Standard
Limit
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IN 0.9 (0.035)
Valve head width limit mm (in.)
EX 1 .O (0.039)
46.0 (1.811)
45.5 (1.791)
Squareness mm (in.)
I
Contact face angle
.
2.0 (0.08)
Valve stem cap width mm (in.) Standard 1.31 to 1.49 (0.0516 to 0.0587)
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