EL Camino V8-350 5.7L DSL (1982)
Lifter / Lash Adjuster: Customer Interest
Diesel Engine - Low Oil Pressure
Number:
84-20
Section:
6A (VI)
Date:
Nov., 1983
Subject:
LOW OIL PRESSURE ON VEHICLES
WITH 5.7L (V8) AND 4.3L (V6) DIESEL ENGINES
Model and Year:
1978-84 IMPALA, CAPRICE, MALIBU, MONTE CARLO, EL CAMINO, CELEBRITY AND C-10 TRUCKS
TO:
ALL CHEVROLET DEALERS
Low oil pressure may be experienced on a diesel caused by valve lifter to bore clearance. The clearance may occur in the upper end of the bore although
the lifter usually wears more than the bore. All wear is toward the center line of the engine. To determine if wear has occurred, measure the upper end of
the lifter in two spots, where it contacts the bore, parallel with the roller and 90~ to the roller. Wear in the area of .005-.008 inches is enough to cause
low oil pressure and the lifter should be replaced.
LIFTER BORE
Measure the lifter bore in the block. Any wear not exceeding .003 inches should be satisfactory. If it is necessary to replace the lifters, stone the sharp
edges on the bearing shoulder area of the new lifters as shown in the illustration, before installation in the lifter bore.