Engine Lubrication System: 1E-3
Diagnostic Information and Procedures
Engine Lubrication Symptom Diagnosis
B705H11504001
Oil Pressure Check
B705H11504003
Check the engine oil pressure periodically. This will give
a good indication of the condition of the moving parts.
NOTE
Before checking the oil pressure, check the
following.
• Oil level (Refer to “Engine Oil and Filter
Change in Section 0B (Page0B-9)”)
• Oil leaks (If leak is found, repair it.)
• Oil quality (If oil is discolored or
deteriorated, replace it.)
Check the oil pressure in the following procedures:
1) Remove the main oil gallery plug (1).
2) Install the oil pressure gauge and attachment to the
main oil gallery.
Special tool
(A): 09915–74521 (Oil pressure gauge hose)
(B): 09915–74570 (Oil pressure gauge
attachment)
(C): 09915–77331 (Meter (for high
pressure))
3) Warm up the engine as follows:
Summer: 10 min at 2 000 r/min
Winter: 20 min at 2 000 r/min
4) After warm up, increase the engine speed to 3 000 r/
min (Observe the tachometer), and read the oil
pressure gauge.
If the oil pressure is lower or higher than the
specification, the following causes may be
considered.
Oil pressure specification
Above 30 kPa (0.3 kgf/cm
2
, 4.27 psi) at 3 000 r/
min, oil temp. at 60 °C (86 °F)
Below 110 kPa (11.0 kgf/cm
2
, 15.64 psi) at 3 000 r/
min, oil temp. at 60 °C (86 °F)
Condition Possible cause Correction / Reference Item
Engine overheats.
(Defective engine internal
parts)
Not enough oil in the engine. Add oil.
Defective oil pump or clogged oil circuit. Replace or clean.
Use of incorrect engine oil. Change.
Exhaust smoke is dirty or
thick
Too much engine oil in the engine. Check level and drain.
1
I705H1150002-01
(C)
(A)
(B)
I705H1150013-01
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