1.
Air suction and exhaust gas leakage-Air circulating through the cooling system,as well as exhaust gas leaking into the system,causes
rapid corrosion and rust formation which will eventually
clog the system and cause
overheating and loss of cooling liquid.The air may be drawn into the system due to low liquid level in the radiator,leaky water pump,or loose fitting connections.Exhaust gas may be blown into the cooling system past the cylinder head gasket or through cracks in the cylinder head and block.
AIR SUCTION TEST..........
EXHAUST GAS LEAKAGE TEST.............
CORRECTIONS.............
2.
Rust preventives-The cooling system must be free of rust and scale to maintain efficiency of the system.Use of inhibitors or rust preventives reduces or prevents
corrosion of metal and prevents formation of scale already formed.Treating the cooling system with an inhibitor consists of adding an inhibitor to the cooling liquid.The inhibitor should beand especially if the system has been cleaned or flushed.
