Suzuki Boulevard M50, Service Manual

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10-10 SERVICING INFORMATION
RADIATOR (COOLING SYSTEM)
Complaint Symptom and possible causes Remedy
Dirty or heavy
exhaust smoke 1. Too much engine oil in the engine
2. Worn piston rings or cylinders
3. Worn valve guides
4. Scored or scuffed cylinder walls
5. Worn valves stems
6. Defective stem seal
7. Worn oil ring side rails
Check with inspection win-
dow drain out excess oil.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Slipping clutch 1. Weakened clutch springs
2. Worn or distorted pressure plates
3. Distorted clutch plates or pressure plates Replace.
Replace.
Replace.
Dragging clutch 1. Some clutch spring weakened while others are
not.
2. Distorted pressure plates or clutch plates
Replace.
Replace.
Transmission will
not shift. 1. Broken gearshift cam
2. Distorted gearshift forks
3. Worn gearshift pawl Replace.
Replace.
Replace.
Transmission will
not shift back. 1. Broken return spring on shift shaft
2. Rubbing or stickily shift shaft
3. Distorted or worn gearshift forks Replace.
Repair or replace.
Replace.
Transmission jumps
out of gear. 1. Worn shifting gears on driveshaft or countershaft
2. Distorted or worn gearshift forks
3. Weakened stopper spring on gearshift stopper
4. Worn gearshift cam plate Replace.
Replace.
Replace.
Replace.
Complaint Symptom and possible causes Remedy
Engine overheats 1. Not enough engine coolant
2. Clogged with dirt or trashes radiator core
3. Faulty cooling fan
4. Defective cooling fan thermo-switch
5. Clogged water passage
6. Air trapped in the cooling circuit
7. Defective water pump
8. Use incorrect coolant
9. Defective thermostat Add coolant.
Clean.
Repair or replace.
Replace.
Clean.
Bleed out air.
Replace.
Replace.
Replace.
Engine overcools 1. Defective cooling fan thermo-switch
2. Extremely cold weather
3. Defective thermostat Replace.
Put on the radiator cover.
Replace.
SA
MP
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