DO-IT-YOURSELF MAINTENANCE 6- 11
HTB170A
Diesel engine Only ethylene glycol based coolant with a corrosion inhibitor suited to aluminium alloy engine components should be used in the cooling system. No further additives or inhibitors should be used.The coolant specific gravity should be checked as prescribed in the mainte- nance schedule to ensure adequatefrost and corrosion protection. In addi- tion, the engine coolant must be re- placed at the specified interval sincethe corrosion inhibitor properties dete- riorate with time. It is important to note that whilst anincrease in the concentration of anti freeze gives an increase in the level offrost protection, a solution which is in excess of 65% anti freeze will result in reduced frost protection and engineoverheating. Therefore the recom- mended concentration of 50% should not be exceeded for general use.The use of methanol based anti freeze compounds may result in engine over- heating and will invalidate the vehiclewarranty. NOTE: It is imperative that vehicles fitted with an air conditioning system have a coolant concentration of the rec- ommended strength at all times. Theuse of the air conditioning system when the cooling system is filled with water only will result in theheater matrix freezing and subse- quently bursting.
SG050C1-E Engine Coolant Level The engine coolant level may be ob- served through the side of the plasticcoolant reservoir (expansion tank) when the engine is cold. If the level is below the "LOW" mark, add coolant of thecorrect concentration until the level is between the "LOW" and "Full" marks. If the level falls below the "LOW" mark ona regular basis despite being topped up, consult a Hyundai dealer. SG050D1-E To Change the engine Coolant The engine coolant should be changed at those intervals specified in the ve- hicle maintenance schedule in Section5. NOTE: Care should be taken to ensure that coolant is not allowed to spill ontothe paintwork since the finish may become damaged. If coolant spill- age occurs, the affected area shouldbe rinsed thoroughly with water.
6- 12 DO-IT-YOURSELF MAINTENANCE
HTB172
!
HTB171
1. Park the vehicle on level ground and
ensure that the parking brake is firmly applied, and the engine allowed tocool. Do not attempt this operation whilst the engine is hot since burning orscalding may result.
2. Prepare a suitable receptacle to col-
lect the displaced coolant and posi-tion this under the radiator drain tap.
3. With the heater temperature control
set to the "HOT" position, removethe radiator cap and open the radiator drain tap. 5. Prepare a suitable quantity of new
engine coolant (refer to section 9)and pour this into the radiator.
6. Start the engine with the radiator cap
still removed and continue to addcoolant as the level decreases as air is expelled from the system. Whenthe level remains constant, replace the radiator cap and replenish the coolant reservoir.
7. When the engine is hot, check to ensure that no coolant leaks arepresent.
4. When the engine coolant has drained completely, close the drain tap en-suring that this is not over tightened. WARNING:
The cooling fan is controlled by en-gine coolant temperature and may sometimes operate even when the engine is not running. Use extremecaution when working near the blades of the cooling fan so that you are not injured by a rotating fanblade. As the engine coolant tem- perature decreases, the fan will auto- matically shut off. This is a normalcondition.
