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 cranksha ,
camsha , and connecting rod bearing surfaces. In
addition to lubricating the bearing surfaces, the
lubrication system supplies oil to the hydraulic valve
li ers.
A high-effi ciency gerotor pump is located in the oil
pan. The oil pump maintains high oil fl ow 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 8 and 9.
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 fi lter regularly.
Use high-quality detergent oil of API (American
Petroleum Institute) service class SJ or higher. Select
the viscosity based on the air temperature at the time
of operation as shown in the following table.
Figure 6-2. 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 bo om portion shows "Energy
Conserving", it means that oil is intended to improve
fuel economy in passenger car engines.
NOTE: Using other than service class SJ or higher oil,
or extending oil change intervals longer than
recommended can cause engine damage.
NOTE: Synthetic oils meeting the listed
classifi cations 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 identifi es the API
service class and SAE viscosity grade. See Figure 6-2.
°F
-20
020324060
50 80 100
°C
-30 -20
-10 0
10 20 30
40
5W-30
10W-30
Kohler 10W-30
SAE 30
Figure 6-1. Viscosity Grade Table.
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