Workshop Manual S3.8 Engine A030K288 (Issue 2) 01-2010 Check Air Connection Check air connection to air cleaner and air crossovers to assure all are secured. Check Engine Coolant Supply Remove the radiator cap and check engine coolant level. Add coolant as needed. COOLING SYSTEM Check and top up radiator with Specified coolant if required. If the coolant starts boiling, there could be a defect in the cooling system which may be on account of : i. Less coolant or dirt/scale having Fig. 1-2: Engine Fuel Filter accumulated inside cooling water passages, especially in the radiator cores.
Fuel System Bleeding If the performance of the engine is affected due to presence of air in the fuel system (commonly known as air lock) the defect can be removed by bleeding the fuel system as follows : ii. Choking of the radiator air passages due to foreign material or damaged radiator fins. iii. Loss of coolant by evaporation and leakage through defective radiator cap. iv. Loose water pump drive belt. a. Loosen bleeding screw on primary filter. v. Coolant leakage from the cooling system. b. Unscrew lift pump lever knob and prime till diesel coming out of the bleeding screw of the primary filter is free from any air bubble. Always use genuine radiator cap.
A proper radiator cap firmly fitted maintains pressure in the cooling system and makes the engine more efficient by permitting a slightly higher operating temperature. The vacuum in the radiator is relieved by a valve provided in the cap. The radiator pressure cap value is 7 PSI. Degrease and clean cooling system regularly. c. Tighten bleeding screw and plunger knob. d. Repeat this process on bleeding screw on the secondary fuel filter and then on the fuel injection pump gallery. If the air bubbles continue coming out of the bleeding screws, either there is less diesel in the tank or there is an air leak in the suction pipe. Check and rectify. Caution :
Do not add cold water too quickly to hot engine. FUEL SYSTEM Overflow Valve The photograph shows different points for fuel system. The description of these points are, In case the engine running is found to be irregular or shows a tendency to fall or there is loss of power, this may be due to faulty operation of the overflow valve in the fuel filter system. 1. Bleeding screw primary filter 2. Bleeding screw secondary filter If necessary, replace it. 3. Drain plug secondary filter. Nozzle Operation 4. Drain plug primary filter. If the engine is running irregularly or there is a diesel knock or the fuel consumption is abnormal, 5. Bleeding screw on fuel injection pump. 10