Dodge ram truck 3500 1996 Service Manual page 1145

B R
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8.0L E i i i i E 9 - 155
CLEANING AND INSPECTION (Continued)
Fig. 66 Measuring Outer Rotor Clearance in Cower
Fig. 67 Measuring Inner Rotor Clearance in Cower
and the rotors are within specifications, replace tim­
ing chain cover.
Inspect oil pressure relief valve plunger for scoring
and free operation in its bore. Small marks may be
removed with 400-grit wet or dry sandpaper.
The relief valve spring has a free length of approx­
imately 49.5 mm (1.95 inches). The spring should
test between 100 and 109 N (22.5 and 24.5 pounds)
when compressed to 34 mm (1-11/32 inches). Replace
spring that fails to meet these specifications.
Fig. 68 Measuring Clearance Ower Rotors
If oil pressure was low and pump is within specifi­
cations, inspect for worn engine bearings or other
reasons for oil pressure loss.
CYLINDER BLOCK
GLEAMING
Clean cylinder block thoroughly and check all core
hole plugs for evidence of leaking.
INSPECTION
Examine block for cracks or fractures.
The cylinder walls should be checked for out-of-
round and taper with Cylinder Bore Indicator Tool,
Special tool 6879 or equivalent. The cylinder block
should be bored and honed with new pistons and
rings fitted if:
• The cylinder bores show more than 0.127 mm
(0.005 inch) out-of-round.
• The cylinder bores show a taper of more than
0.254 mm (0.010 inch).
• The cylinder walls are badly scuffed or scored.
Boring and honing operation should be closely coor­
dinated with the fitting of pistons and rings so spec­
ified clearances may be maintained.