25. a. Thermosyphon b. Pump circulation
2.0 Water cooling system
3.0 THERMOSTAT in cooling system
A thermostat valve is used in the water cooling system to regulate the circulation of water in
system to maintain the normal working temperature of the engine parts during the operating
conditions.
26. LUBRICATION SYSTEM
1.0 Petroil or Mist lubrication system
About 3 to 6% of lubricating oil is mixed with petrol in the fuel tank.
Main disadvantages,
Idle running the oil will get separated and cause clogging of fuel passage in carburetor
.
More oil- will release more carbon deposits in the cylinder
Less oil โ insufficient lubrication cause damage to the engine.
27. LUBRICATION SYSTEM
2.0 Wet sump system
Lubrication oil is stored in the oil sump.
a) Gravity system b) Splash system
29. LUBRICATION SYSTEM
3.0 Dry sump system
d) Semi pressure system
Lubrication oil is not kept in stored in the oil sump. Oil is carried in a separate tank and fed to
the engine.