Engine Lubrication Symptom Diagnosis - Suzuki 2005 GSF1200 Service Manual

Engine Lubrication Symptom Diagnosis

Condition
Engine overheats.
Exhaust smoke is dirty or
thick.
Engine lacks power.
Oil Pressure Check
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
Replacement: in Section 0B")
• Oil leaks (If leak is found, repair it.)
• Oil quality (If oil is discolored or
deteriorated, replace it.)
1) Start the engine and check if the oil pressure
indicator light is turned on. If the light stays on, check
the oil pressure indicator light circuit. If the circuit is
OK, check the oil pressure in the following manner.
2) Remove the main oil gallery plug (1).
Diagnostic Information and Procedures
Possible cause
Insufficient amount of engine oil.
Defective oil pump.
Clogged oil circuit.
Clogged oil cooler
Dirty or bent oil cooler fins
Incorrect engine oil.
Excessive amount of engine oil.
Excessive amount of engine oil.
B649G11504003
1
I649G1150022-01
Engine Lubrication System:
Correction / Reference Item
Check level and add.
Replace.
Clean.
Clean or replace.
Clean or repair.
Change.
Check level and drain.
Check level and drain.
3) Install the oil pressure gauge and attachment into
the main oil gallery.
Special tool
(A): 09915–74521 (Oil pressure gauge hose)
(B): 09915–74540 (Oil pressure gauge
attachment)
(C): 09915–77331 (Meter (for high
pressure))
(B)
4) Warm up the engine as follows:
Summer: 10 min. at 2 000 r/min.
Winter: 20 min. at 2 000 r/min.
5) 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 300 kPa (3.0 kgf/cm
min., oil temp. at 60 °C (140 °F)
Below 600 kPa (6.0 kgf/cm
min., oil temp. at 60 °C (140 °F)
High oil pressure
• Engine oil viscosity is too
high
• Clogged oil passage
• Combination of the
above items
1E-3
B649G11504004
(C)
(A)
I649G1150023-01
2 , 43 psi) at 3 000 r/
2 , 85 psi) at 3 000 r/
Low oil pressure
• Clogged oil filter
• Oil leakage from the oil
passage
• Damaged O-ring
• Defective oil pump
• Combination of the
above items