Specifications

Run engine until achieving normal operating tem-
perature.
(1) Position the vehicle on a level surface and turn
engine off.
(2) Remove oil fill cap.
(3) Hoist vehicle. Refer to Hoisting and Jacking
Recommendations.
(4) Place a suitable drain pan under crankcase
drain.
(5) Remove drain plug from crankcase and allow
oil to drain into pan (Fig. 5). Inspect drain plug
threads for stretching or other damage. Replace
drain plug if damaged.
(6) Install drain plug in crankcase.
(7) Lower vehicle and fill crankcase with specified
type and amount of engine oil.
(8) Install oil fill cap.
(9) Start engine and inspect for leaks.
(10) Stop engine and inspect oil level.
ENGINE OIL
ENGINE OIL QUALITY
Use only oils conforming to API (American Petro-
leum Institute) quality SG, SG/CD, or CCMC G4.
Use only Diesel engine oil meeting standard
MIL-2104C or API service classification SG/CD or
CCMM PD1 .
OIL VISCOSITY
Grade 15W-40 is recommended for temperatures
between +35°C to –10°C (95°F to 14°F). Low viscosity
oils must have the proper API quality or the CCMC
G5 designation. Low viscosity oils are preferred when
minimum temperatures consistently fall below –12°C
(10°F).
ENGINE OIL FILTER CHANGE
(1) Position a drain pan under the oil filter.
(2) Using a suitable oil filter wrench loosen filter.
(3) Rotate the oil filter counterclockwise to remove
it from the oil filter base (Fig. 6).
(4) When filter separates from base, tip gasket end
upward to minimize oil spill. Remove filter from vehi-
cle.
(5) With a cloth, wipe clean the gasket sealing sur-
face of oil and grime.
OIL FILTER INSTALLATION
(1) Lightly lubricate oil filter gasket with engine
oil.
(2) Thread filter onto the base. When gasket
makes contact with sealing surface, hand tighten fil-
ter one full turn, do not over tighten.
(3) Add oil, verify crankcase oil level and start
engine. Inspect filter area for oil leaks.
TIMING PROCEDURE
CAUTION: It could take up to 70 crankshaft revolu-
tions to align sprocket timing marks with the dark
chain links. If the chain is removed (Fig. 7) before
the sprocket marks are in their proper locations you
must first loosen the rocker arm supports before
rotating crankshaft or camshaft sprockets. This will
prevent the valves from hitting the pistons.
Installing timing chain (Fig. 8). Starting at the
crankshaft align the dark link on the chain to the
timing mark on the crankshaft sprocket. Next align
Fig. 5 Oil Drain Plug
Fig. 6 Oil Filter
NS/GS ENGINE 9 - 41
SERVICE PROCEDURES (Continued)