3.63
ENGINE
3
Excessive Smoke and Carbon Buildup
• Excessive piston-to-cylinder clearance
• Wet sumping due to over-full crankcase
• Worn rings, piston, or cylinder
• Worn valve guides or seals
• Restricted breather
• Air filter dirty or contaminated
Low Compression
• Cylinder head gasket leak
• No valve clearance ( cam wear )
• Cylinder or piston worn
• Piston rings worn, leaking, broken, or sticking
• Bent valve or stuck valve
• Valve spring broken or weak
• Valve not seating properly (bent or carbon accumulated
on sealing surface)
• Rocker arm sticking
Backfiring
• Fouled spark plug or incorrect plug or plug gap
• Exhaust system air leaks
• Exhaust system air leaks
• Valve sticking
• Ignition system faulty:
Spark plug cap cracked / broken
Ignition coil faulty
Ignition or kill switch circuit faulty
Poor connections in ignition system
Ignition timing incorrect
Sheared flywheel key
Cooling System
Overheating
• Low coolant level
• Air in cooling system
• Wrong type/mix of coolant
• Faulty pressure cap or system leaks
• Restricted system (mud or debris in radiator fins
causing restriction to air flow, passages blocked in
radiator, lines, pump, or water jacket, accident damage)
• Lean mixture (vents, fuel pump or fuel valve)
• Fuel pump output weak
• Electrical malfunction
• Water pump failure/ Loose impeller
• Thermistor failure
• Cooling fan inoperative or turning too slowly (perform
current draw test)
• Low oil level
• Spark plug incorrect heat range
• Faulty hot light circuit
• Thermostat stuck closed or not opening completely
Temperature Too Low
• Thermostat stuck open
Leak at Water Pump Weep Hole
• Faulty water pump mechanical seal (coolant leak)
• Faulty pump shaft oil seal (oil leak)
Summary of Contents for 2008 Ranger RZR
Page 9: ...1 9 GENERAL INFORMATION 1 SAE Tap Drill Sizes Metric Tap Drill Sizes Decimal Equivalents ...
Page 16: ...2 6 MAINTENANCE COMPONENT INSPECTION SERVICE LOCATIONS Front and Rear View ...
Page 17: ...2 7 MAINTENANCE 2 RH and LH Side Views ...
Page 42: ...3 2 ENGINE ENGINE SPECIFICATIONS Crankcase Exploded Views ...
Page 43: ...3 3 ENGINE 3 Oil Pump Water Pump Engine Cover Exploded View ...
Page 44: ...3 4 ENGINE Stator Cover Starter Water Pump Oil Filter Pressure Relief Exploded View ...
Page 45: ...3 5 ENGINE 3 Cylinder Cylinder Head Piston Exploded View ...
Page 104: ...NOTES ENGINE 3 64 ...
Page 139: ...4 35 ELECTRONIC FUEL INJECTION 4 Fuel Injector PTO Circuit Fuel Injector MAG Circuit ...
Page 142: ...4 38 ELECTRONIC FUEL INJECTION Throttle Position Sensor TPS Circuit Fuel Pump Circuit ...
Page 230: ...NOTES FINAL DRIVE 7 36 ...
Page 287: ...10 17 ELECTRICAL 10 COOLING SYSTEM SCHEMATIC Cooling System Break Out Diagram ...
Page 308: ...10 38 ELECTRICAL Instrument Cluster Circuit Transmission Switch Circuit ...
Page 309: ...10 39 ELECTRICAL 10 Wheel Speed Sensor Circuit AWD Circuit ...
Page 310: ...10 40 ELECTRICAL Fuel Gauge Display Circuit Cooling Fan Circuit ...
Page 311: ...10 41 ELECTRICAL 10 Charging System Circuit ...
Page 312: ...NOTES ELECTRICAL 10 42 ...