Hyundai Accent: Engine Mechanical System / Cooling System

Troubleshooting

- Engine Overheat Troubleshooting

	Inspection	Remedy
Visual inspection	Inspect for shortage of coolant in reservoir tank .	Reinspect after replenishing coolant.
	Inspect for coolant pollution after removing radiator cap.	Reinspect after replacing coolant.
	• Be careful when removing radiator cap from overheated vehicle.

Inspect for leakage and loose coolant hoses
(radiator hose, heater hose, oil cooler hose, etc.).
Reinspect for leakage after reinstalling hoses and clamps.

Checking for coolant leaks of Integrated Thermal Management Module (ITM)
Replace O-ring or replace the integrated thermal management module (ITM) if required

Inspecting the heater pipe connection to find coolant leaks.
Reinspect for leakage after reinstalling hoses and clamps.

Inspect for leakage on water inlet fitting mounting part.
Reinspect for leakage after replacing O-ring.

Reinspect for leakage after tightening to the specified torque.

Inspect drive belt (for normal operation of water pump).
Adjust drive belt tension or replace.

Inspect for leakage on water pump gasket mounting part.
Reinspect for leakage after replacing gasket.

Reinspect for leakage after tightening to the specified torque.

Inspect for loose coolant temperature sensor, cooling fan connector and pin.
Reinstall loose connector.

Replace relevant part if connector pin is damaged.

Inspect operation status of cooling fan.
- Check operation status by switching ON/OFF the heater control A/C.
Check mounting status of ground cable.

• Will not operate in cold ambient temperature.

Diagnostic device
Inspect self-diagnostic code using GDS.
Check coolant temperature sensor, wiring, connector, etc.

Unit inspection
Inspect water pump impeller.
Replace water pump.

Coolant ➤

Cooling Fan ➤

Radiator

- Components

1 . Radiator
2 . Radiator upper hose
3 . Radiator lower hose
4 . Filler neck assembly

5. Radiator upper mounting bracket
6 . Radiator lower mounting insulator
7 . Radiator air guard

1.Disconnect the battery negative terminal.

2.Remove the cooling fan assembly. (Refer to Cooling System - "Cooling Fan")

3.Disconnect the radiator lower hose (A).

4.Separate the A/C condenser from the radiator and Remove the radiator (A) from the vehicle.

5.Install in the reverse order of removal.

6.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.

7.Start engine and check for leaks.

1.Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.

2.Apply a pressure of 93.16 - 122.58 kpa (0.95 - 1.25 kg/cm², 13.51 - 17.78 psi).

3.Check for a drop in pressure.

4.If the pressure drops, replace the cap.

1.Wait for the engine to cool. Carefully remove the radiator cap and fill the radiator with engine coolant. Then, install it on the pressure tester.

2.Apply a pressure tester to the radiator and apply a pressure of 93.16 - 122.58 kpa (0.95 - 1.25 kg/cm², 13.51 - 17.78 psi).

3.Inspect for engine coolant leaks and a drop in pressure.

4.Remove the tester and reinstall the radiator cap.

• Check for engine oil in the coolant and/or coolant in the engine oil.

Integrated Thermal Management Module (ITM) ➤

Water Inlet Fitting

- Removal Water Inlet Fitting

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.Disconnect the radiator lower hose (A).

4.Remove the water inlet fitting (A).

Tightening torque : 18.6 - 23.5 N.m (1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)

5.Install in the reverse order of removal.

• Always use a new integrated thermal management module (ITM) O-ring.

• When assembling the hose, Use a product with EPDM rubber stability.

• If a hose lubricant is applied, fill the coolant after 30 minutes of assembly.

• Place the hose at the specified location of the stopper and assemble them together. The front side of stoppers should be in close contact with the hose. And then, place the clamp at the correct location.

6.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.

7.Start engine and check for leaks.

Water pump ➤