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B18 Owner's 2020-2025 Sentra owner information B18 Service 2020-2025 Sentra Workshop manual B17 Owner's 2013-2019 Sentra owner documentation B17 Service 2013-2019 Sentra service information

Nissan Sentra B18 (2020-2025) Service Manual: System Description. Description

Description

Engine Cooling System

Engine Cooling System

  • The radiator adopts a side flow aluminum radiator core.

  • A drive belt is adopted for water pump operation.

  • A shallow bottom is adopted for the cylinder block water jacket for optimizing cooling performance.

  • An electric cooling fan is adopted. The cooling fan is controlled by signals from the ECM (engine control module).

1.

Water pump housing

2.

Water pump

3.

Water inlet

4.

Oil cooler

5.

Heater thermostat assembly (CVT models only)

6.

EGR cooler

7.

Electric throttle control actuator

8.

Water outlet

A.

View A

B.

From reservoir tank. Refer to Exploded View.

C.

From radiator. Refer to Exploded View.

D.

From heater core. Refer to Exploded View.

E.

To heater core. Refer to Exploded View.

F.

To CVT fluid warmer (CVT models only). Refer to Exploded View.

G.

From CVT fluid warmer (CVT models only). Refer to Exploded View.

H.

To radiator. Refer to Exploded View.

        

Engine Cooling System Schematic

Engine Cooling System Schematic

CVT models

1.

Water outlet

2.

Cylinder head

3.

Water control valve

4.

Cylinder block

5.

Water pump

6.

Water pump housing

7.

Water inlet

8.

Radiator

9.

Electric throttle control actuator

10.

EGR cooler

11.

Heater core

12.

CVT fluid warmer

13.

Heater thermostat assembly

14.

Oil cooler

15.

Reservoir tank

A.

High temperature

B.

Normal temperature

    
M/T models

1.

Water outlet

2.

Cylinder head

3.

Water control valve

4.

Cylinder block

5.

Water pump

6.

Water pump housing

7.

Water inlet

8.

Radiator

9.

Electric throttle control actuator

10.

EGR cooler

11.

Heater core

12.

Reservoir tank

13.

Oil cooler

A.

High temperature

B.

Normal temperature
    Preparation. Preparation
    Preparation Special Service Tools Special Service Tools The actual shape of the tools may differ from those illustrated here. Tool number (TechMate No.) Tool name   Descrip...
    Symptom Diagnosis. Overheating Cause Analysis
    Overheating Cause Analysis Diagnosis Chart by Symptom Diagnosis Chart by Symptom   Symptom Inspection item Cooling system malfunctions Poor heat radiation Water pump malfun...

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    P1217 Engine Over Temperature
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