Dodge RAM TRUCK 1500 1995 Service Manual page 996

B R
5 J L (DIESEL) ENGINE I - 1 5 5
VALVE GUIDE BORES
NEW DIAMETER LIMITS
8.019-8.029 m m (0.3157-0.3165 Inch)
WORN LIMIT
8.090 mm (0.3185 inch)
J9109-135
Fig. 5 Valve Guide Bore
must also be square w i t h the combustion face w i t h i n
0.10 m m (0.004 inch) at 50.0 m m (1.9685 inch) r a ­
dius.
Lubricate the valve guides w i t h oil and press the
guides flush to the bottom of the bosses.
Trim
off the top of t h e valve guides flush to top of
guide bosses, i f necessary.
Machine the valve guide bores to 8.029 ±0.010 m m
(0.3161 ±0.0004 inch) - (Fig. 6).
The valve guide bore must be centered w i t h the
valve seat w i t h i n 0.35 m m (0.0138 inch) diameter. I t
also must be square w i t h the combustion face w i t h i n
0.010 m m (0.0004 inch) at 50.0 m m (2.0 inch) radius.
THICK WALL-SERVICE GUIDES
Machine the * cylinder head valve guide bores to
14.000 ±0.013 m m (0.5512 ±0.0005 inch) diameter
(Fig. 7).
Valve' guides must be centered w i t h valve seats
w i t h i n 0.35 m m (0.01378 inch) diameter. Valve
guides m u s t also be square w i t h the combustion face
w i t h i n 0.10 m m (0.004 inch) at 50.0 m m (2.0 inch)
radius.
Lubricate the valve guides w i t h oil and press i n the
guides to 12.25 ±0.50 m m (0.4823 ±0.020 inch) pro­
trusion above the cylinder head.
Ream the bores to 8.029 ±0.010 m m (0.3161
±0.0004 inch) - (Fig. 7).
VALVE SPRINGS
Measure the valve spring length. The approximate
free length is 60 m m (2.36 inch) w i t h the m a x i m u m
inclination of 1.0 m m (0.039 inch).
EXHAUST
CYLINDER
HEAD
INTAKE
CYLINDER HEAD VALVE GUIDE BORES
CYLINDER HEAD VALVE GUIDE BORES
11.125 ±0.013 mm (0.438 ±0.0005 in)
VALVE GUIDE BORES
8.029 ±0.010 mm (0.3161 ±0.0004 in)
Fig. 6 Service
VALVE GUIDE BORES
we Guides
J9109-136
-Thin Wall
CYLINDER
HEAD
EXHAUST
INTAKE
CYLINDER HEAD VALVE GUIDE BORES
CYLINDER HEAD VALVE GUIDE BORES
14.000 ±0.013 mm (0.5512 ± 0.0005 in)
VALVE GUIDE BORES
8.029 ±0.010 mm (0.3161 ±0.0004 in)
J9109-137
Fig. 7 Service Valve Guides—Thick Wall
Measure the valve spring force. 359 N (81 lbs.) is
the m i n i m u m acceptable load required to compress
the spring to a height of 49.25 m m (1.94 inch).
I f the valve spring does not meet the l i m i t s above,
replace the spring.