Hyundai Accent: Cooling System / Water pump

- Components

1. Water pump pulley
2. Water pump
3. Water pump gasket

1.Remove the engine room under cover.(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")

2.Drain the coolant. (Refer to Cooling System - "Coolant")

3.Remove the drive belt. (Refer to Timing System - "Drive Belt")

4.Remove the water pump pulley (A).

Tightening torque :9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

5.Remove the water pump (A) and gasket.

Tightening torque :11.8 - 13.7 N.m (1.2 - 1.4 kgf.m, 8.7 - 10.1 lb-ft)

6.Install in the reverse order of removal.

• Always use new water pump gasket.

• Check the specifications of the water pump instaling bolts. (Make sure that a solid sealant is applied to the thread of the bolt.)

• Always use new water pump bolts.

• Remove the sealant residue inside the bolt tap hole.

• When installing the water pump, tighten the bolts in the order shown in the figure below.

• Before installing the water pump, remove the hardened sealant, foreign matters, oil, dust, water, etc. off the inside hole (A) where the bolt is installed.

7.Fill with engine coolant. (Refer to Cooling System - "Coolant")

• The coolant must be injected according to the integrated thermal management module (ITM) coolant filling method.

8.Start engine and check for leaks.

Trouble Symptom		Probable Cause		Remedy
Coolant leakage	• From the bleed hole of the water pump	Visually check	• Check leaks after about ten-minute warming up.	• If coolant still leaks, replace a water pump.
				• If leakage stops, reuse the water pump (Do not replace the pump with a new one).
				• Be careful not to misrepair because evaporite sediment caused by tiny vapor evaporation or a little coolant evaporation evidence can happen even when the water pump operates normal. – Get rid of sediment in the air hole, and recheck there is leakage or not.

• From gaskets or bolts

• Check the tightening of the water pump mounting bolts.

• Retighten the mounting bolts.

• Check damage of gaskets or inflow of dust.

• Replace the gasket and clean dust off.

• From outer surface of water pump

• Check the material or any cracks of the water pump.

• Poor material. If any crack found, replace the water pump.

Noise

• From bearings

• From mechanical seals

• Impeller interference

• After starting the engine, check noise with a stethoscope.

• If there is no noise, reuse the water pump (do not replace it).

• If there is any noise from the water pump, remove the drive belt and recheck.

Inspection after removing a drive belt

• After removing a water pump and a drive belt, check noise again

• If there is noise, reuse the water pump. (Check other drive line parts)

• If there is no noise, replace the water pump with a new one.

Inspection after removing a water pump

• Check water pump body and impeller interference.

• If there is any interference between them, replace the water pump with a new one.

Overheating

• Damaged impeller

• Loosened impeller

• Corroded impeller insert

• Replace the water pump if it is separated by corrosion between impellers and inserts

• Replace the water pump if there is a crack in the PL impeller.

• Check engine coolant.

• Poor coolant quality / Maintenance check

• Impeller seperated from the shaft

• Replace the water pump.