Dodge ram truck 3500 1996 Service Manual page 1193

B R
5.9L (DIESEL) ENGINE ' 9 - 203
CLEANING AND INSPECTION
(Continued)
REFERENCE
HEIGHT (MIN
STOCK J
TOTAL (MAX.) '
SURFACE FINISH
STOCK
REMOVED-
IDENTIFICATION
AREA
STOCK TOTAL (MAX.)
1.00 mm (0.03937 inch)
REFERENCE HEIGHT (MIN.)
94.00 ±0.25 mm
(3.7008 ±0.0010 inch)
SURFACE FINISH
1.5 to 3.2 micrometers
(60 to 128 microinches)
J9109-134
Fig. 117 Cylinder Head Stock Removal
CLEMMING
Clean the carbon from the injector nozzle seat with
a nylon or brass brush.
Scrape the gasket residue from all gasket surfaces.
Wash the cylinder head i n hot soapy water solution
(88°C or 140°F).
After rinsing, use compressed air to dry the cylin­
der head.
Polish the gasket surface with 400 grid paper. Use
an orbital sander or sanding block to maintain a flat
surface.
W A L W E S
AND WALWE SPRINGS
VALVES
CLEANING AID INSPECTION
Before cleaning, note the valve number. Clean the
valve heads with a soft wire wheel. Mark the valve
with the number noted above.
Polish the valve stems with crocus cloth.
Inspect for abnormal wear on the valve heads and
stems. Replace badly worn valves.
Check for bent valves. Replace bent valves.
Measure the valve stem diameter (Fig. 118). The
valve stem diameter should be 7.935-7.960 mm
(0.3126-0.3134 inch). I f out of limits, replace the
valve. Mark the new valves with the replacement
location.
Inspect the end of the valve stem for flatness.
I f required, resurface the valve end.
.1
1
1
1
- 1
I
1
7
MEASURE AT THESE POINTS
J9109-144
Fig. 118 Measure Valve Stem Diameter
VALWE GRINDING
The valve seat angle should be 30° (Intake Valve)
and 45° (Exhaust Valve) - (Fig. 119).
I N T A K E
E X H A U S T
J 9 1 0 9 - 4 1
^ 0 0 ^
Fig. 119 Valve Seat Angle
Measure the rim thickness (Fig. 120). The mini­
mum valve rim thickness is 0.79 mm (0.031 inch).
VALVE RIM
THICKNESS
J9109-146
Fig. 120 Valve Rim Thickness
Grind the face of valves to be reused.
Check the valve stem tip for flatness. I f required,
re-surface the tip.
VALVE GUIDES
INSPECTION
Inspect the valve guides for scuffing or scoring.