Dodge RAM TRUCK 1500 1995 Service Manual page 976

8.IL ENGINE S -131
9309-70
Fig. § Measuring Inner Rotor Thickness
Fig. 11 Measuring Inner Rotor Clearance in Cower
If a feeler gauge of 0,077 mm (0.008 inch) or more
can be inserted between rotors and the straightedge,
and the rotors are within specifications, replace tim­
ing chain cover.
Fig. 12 Measuring Clearance Over Rotors
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 84 mm (1-11/82 inches). Replace
spring that fails to meet these specifications.
If oil pressure was low and pump is within specifi­
cations, inspect for worn engine bearings or other
reasons for oil pressure loss.
INSTALLATION
(1) Lubricate the pump rotors using petroleum
jelly or lubriplate and install in the timing chain
cover. Use new parts as required (Fig. 18).
Fig. 18 Priming Oil Pump.