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ENGINE
3.12
700/800 EFI ENGINE SERVICE DATA
**Cylinder Head / Valve EFI Engine No. -- EH680OLE / EH780OLE
Camshaft Cam lobe height In
Std 1.3334” (33.8674 mm)
g
Ex
Std 1.3334” (33.8674 mm)
Camshaft journal OD
Mag 1.654” ± 0.00039” (42 ± 0.010 mm)
j
Center 1.634” ± 0.00039” (41.50 ± 0.010 mm)
PTO 1.614” ± 0.00039” (41 ± 0.010 mm)
Camshaft journal
b
I
D
Mag 1.656” ± 0.00039” (42.07 ± 0.010 mm)
j
bore ID
Center 1.637” ± 0.00039” (41.58 ± 0.010 mm)
PTO 1.617” ± 0.00039” (41.07 ± 0.010 mm)
Camshaft Oil
l
Std 0.00276” ± 0.00079” (0.07 ± 0.02 mm)
clearance
End Play 0.0167” ± 0.0098” (0.425 ± 0.25 mm)
Counter
Balance
End Play 0.005” (0.127 mm)
Cylinder
H
d
Surface warpage limit 0.00394” (0.1 mm)
y
Head
Standard height 3.478” (88.35 mm)
Valve Seat Contacting width In
Std 0.0472” + 0.00787” -- 0.0039”
(1.20 + 0.20 -- 0.10 mm)
Ex
Std 0.0591” + 0.00787” -- 0.0039”
(1.50 + 0.20 -- 0.10 mm)
Seat Angle Std 45.5 ± 0.25°
Valve
G
i
d
Inner diameter 0.2367” ± 0.00029” (6.012 ± 0.007 mm)
Guide
Protrusion above head 0.807” ± 0.0039” (20.50 ± 0.01 mm)
Valve Margin
T
h
i
k
In
Std 0.79” (20.06mm)
g
Thickness
Max-- 0.98” (24.89mm) Min-- 0.59” (14.98mm)
Ex
Std 0.80” (3.488 mm)
Max-- 1.0” (25.4mm) Min-- 0.60” (15.24mm)
Stem diameter In 0.2356” ± 0.00039” (5.985 ± 0.01 mm)
Ex 0.2351” ± 0.00039” (5.972 ± 0.01 mm)
Stem oil
l
Std
In 0.00228” ± 0.00098” (0.058 ± 0.025 mm)
clearance
Ex 0.00275” ± 0.00098” (0.0870± 0.025mm)
Overall length
In 4.51” ± 0.01476” (114.5550 ± 0.375 mm)
g
Ex 4.5453” ± .01496” (115.45 ± 0.38 mm)
Valve
Spring
Overall length
Free
Length
1.735” (46.069 mm)
p
g
Installed
Height
Intake -- 1.4638” (37.18 mm)
Exhaust -- 1.4736” (37.43 mm)
**denotes cylinder head with bronze valve guide