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6.1
Section 6
Lubrication System
6
Section 6
Lubrication System
General
This engine uses a full pressure lubrication system,
delivering oil under pressure to the crankshaft,
camshaft, and connecting rod bearing surfaces. In
addition to lubricating the bearing surfaces, the
lubrication system supplies oil to the hydraulic valve
lifters.
A high-efficiency gerotor pump is located in the oil
pan. The oil pump maintains high oil flow and oil
pressure, even at low speeds and high operating
temperatures. A pressure relief valve in the oil pan
limits the maximum pressure of the system.
Service
The oil pan must be removed to service the oil pump
or oil pickup. Refer to the appropriate procedures in
Sections 9 and 10.
Oil Recommendations
Using the proper type and weight of oil in the
crankcase is extremely important; so is checking oil
daily and changing the oil and filter regularly.
Use high-quality detergent oil of API (American
Petroleum Institute) service class SG, SH, SJ or
higher. Select the viscosity based on the air
temperature at the time of operation as shown in the
following table.
Figure 6-1. Oil Container Logo.
The top position of the symbol shows service class
such as API SERVICE CLASS SJ. The symbol may
show additional categories such as SH, SG/CC, or
CD. The center portion shows the viscosity grade
such as SAE 10W-30. If the bottom portion shows
‘‘Energy Conserving,’’ it means that oil is intended to
improve fuel economy in passenger car engines.
NOTE: Using other than service class SG, SH, SJ or
higher oil, or extending oil change intervals
longer than recommended can cause engine
damage.
NOTE: Synthetic oils meeting the listed
classifications may be used with oil changes
performed at the recommended intervals.
However, to allow piston rings to properly
seat, a new or rebuilt engine should be
operated for at least 50 hours using standard
petroleum based oil before switching to
synthetic oil.
A logo or symbol on oil containers identifies the API
service class and SAE viscosity grade. See Figure 6-1.
*Use of synthetic oil having 5W-20 or 5W-30 rating is
acceptable, up to 4°C (40
°F).
**Synthetic oils will provide better starting in extreme
cold below -23°C (-10
°F).
*
**