freightliner Custom Classic MT45 2022 Maintenance Manual page 23

Engine
the oil must be warm and the vehicle must be on
level ground.
1. Turn off the engine and give the oil several min-
utes to drain back into the oil pan. If this is not
done, the oil dipstick may not show the actual
level.
2. Pull out the dipstick and clean it with a paper
towel or cloth, then push the dipstick back in all
the way. Remove it again, keeping the tip down,
and check the level.
3. If the oil is below the cross-hatched area at the
tip of the dipstick, add at least one quart (liter) of
the recommended oil. See
08/05/2010
NOTE: Oil should be within the cross-hatched area of
the dipstick.
Fig. 3, Oil Dipstick
Changing
1. Park the vehicle on a level surface, apply the
park brake, and shutdown the engine.
2. Place a drain pan under the oil pan.
3. Remove the oil drain plug and let the oil drain
into the drain pan.
4. Clean the drain plug and set aside.
5. Remove the oil filter and clean the rim of the oil
filter housing.
6. Lubricate the O-ring of the new oil filter, then in-
stall the oil filter. Tighten the filter by hand until
snug, being careful not to overtighten.
7. Install the oil drain plug. Tighten the plug 18 lbf·ft
(24 N·m).
8. When determining the type of engine oil to use,
look for the API starburst symbol, shown in
Fig. 4. Also look for the Dexos 1 Approved-Gen
2 symbol (for 6.6 L engines), shown in
Fill the engine with SAE 5W–30 oil as follows:
• 6.0 L engines—6 quarts (5.6 L) of oil
Walk-In Van Chassis Maintenance Manual, May 2022
Fig. 3.
f012186
Fig. 5.
• 6.6 L engines—8.4 quarts (8 L) of oil
08/05/2010
Fig. 4, API Symbol
05/12/2021
Fig. 5, Dexos 1 Approved-Gen 2 Symbol (for 6.6 L
engines)
9. Pull out the dipstick, clean it and put the dipstick
all the way back in. Remove the dipstick again to
check that the correct amount of oil has been
added.
01–04 Spark Plugs and Wires
Inspecting and
Replacing—Gasoline,
Propane and CNG
Engines
Visual Inspection
1. Lift the four latches and remove the engine ac-
cess cover. See Fig.
2. Inspect the spark plug wires for cracks and chaff-
ing.
3. If the spark plug wires need to be replaced, see
the instructions under Replacement. If replace-
ment is not needed, install the engine access
cover and lock the four latches.
01
f012187
f100152
6.
01/3