Engine Cooling System: Diagnosis Nissan Versa II

Troubleshooting Chart

RADIATOR: Inspection

Check radiator for mud or clogging. If necessary, clean radiator as follows.

1. Spray water to the back side of the radiator core using a side-to-side motion from the top down.
2. Stop spraying when debris no longer flows from radiator core.
3. Blow air into the back side of radiator core using a side-to-side motion from the top down. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.81 in).
4. Continue to blow air until no water sprays out.
5. Check for coolant leaks. Repair as necessary.

Scheme 1

INSPECTION AFTER INSTALLATION

1. Check for engine coolant leaks. Refer to " «INSPECTION»(ref-605935-S06389182172014032500000) ".
2. Start and warm up the engine. Visually inspect for coolant leaks. Repair as necessary.

Scheme 2

INSPECTION AFTER REMOVAL

1. Visually check for significant dirt or rust on the water pump body and vane (A) and replace as necessary.
2. Check that the vane shaft turns smoothly by hand and is not excessively loose.
3. Replace the water pump assembly if the water pump does not perform properly.

Scheme 3

1. Before starting engine, check oil/fluid levels, including engine coolant and engine oil. If less than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-605940-S11091129442014032500000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids, including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down engine, again check oil/fluid levels, including engine oil and engine coolant. Refill to specified level, if necessary.
9. Summary of the inspection items: Item Before starting engine Engine running After engine stopped Engine coolant Level Leakage Level Engine oil Level Leakage Level Transmission/transaxle fluid A/T and CVT Models Leakage Level/Leakage Leakage M/T Models Level/Leakage Leakage Level/Leakage Other oils and fluids (1) Level Leakage Level Fuel Leakage Leakage Leakage Exhaust gas - Leakage - (1) Power steering fluid, brake fluid, etc.

Scheme 4

1. Before starting engine, check oil/fluid levels, including engine coolant and engine oil. If less than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-605940-S11091129442014032500000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids, including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down engine, again check oil/fluid levels, including engine oil and engine coolant. Refill to specified level, if necessary.
9. Summary of the inspection items

Scheme 5

Scheme 6

1. Before starting engine, check oil/fluid levels, including engine coolant and engine oil. If less than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-605940-S11091129442014032500000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids, including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down engine, again check oil/fluid levels, including engine oil and engine coolant. Refill to specified level, if necessary.
9. Summary of the inspection items: Item Before starting engine Engine running After engine stopped Engine coolant Level Leakage Level Engine oil Level Leakage Level Transmission/transaxle fluid A/T and CVT Models Leakage Level/Leakage Leakage M/T Models Level/Leakage Leakage Level/Leakage Other oils and fluids (1) Level Leakage Level Fuel Leakage Leakage Leakage Exhaust gas - Leakage - (1) Power steering fluid, brake fluid, etc.