Nissan Pathfinder. Manual - part 845

 

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Nissan Pathfinder. Manual - part 845

 

 

ENGINE MAINTENANCE (VQ35DE)

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ENGINE MAINTENANCE (VQ35DE)

DRIVE BELTS
DRIVE BELTS : Exploded View

INFOID:0000000009761151

DRIVE BELTS : Checking Drive Belt

INFOID:0000000009761149

WARNING:

Inspect and check the drive belt with the engine off.
1. Visually check entire drive belt for wear, damage or cracks.
2. Check that the drive belt auto-tensioner indicator is within the possible use range.

NOTE:

• When new drive belt is installed, the drive belt auto-tensioner indicator should be within the new drive

belt range.

• Check the drive belt auto-tensioner indicator when the engine is cold.

3. If the drive belt auto-tensioner indicator is out of the possible use range or drive belt is damaged, replace

drive belt.

DRIVE BELTS : Tension Adjustment

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• Drive belt tension is automatically adjusted by the drive belt auto-tensioner.

• Drive belt tension is not manually adjustable.

ENGINE COOLANT
ENGINE COOLANT : System Inspection

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WARNING:

Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter

turn to allow built-up pressure to escape. Carefully remove the cap by turning it all the way.    

CHECKING COOLING SYSTEM HOSES

Check hoses for the following:

• Improper attachment

1.

Drive belt auto-tensioner

2.

Generator

3.

A/C compressor

4.

Drive belt

5.

Crankshaft pulley

A.

Drive belt auto-tensioner indicator

B.

New drive belt range

C.

Possible use range

D.

View D

Engine front

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ENGINE MAINTENANCE (VQ35DE)

• Leaks

• Cracks

• Damage

• Loose connections

• Chafing

• Deterioration

CHECKING RESERVOIR LEVEL

• Check the coolant reservoir tank engine coolant level when the

engine is cool.   

• Adjust engine coolant level, if necessary, to ensure that the engine

coolant level is within the MIN to MAX range.

CHECKING COOLING SYSTEM FOR LEAKS

To check for leaks, apply pressure to the cooling system using suit-

able tools (A) and (B). 

WARNING:

Do not remove the radiator cap when the engine is hot. Serious

burns could occur from high pressure engine coolant escaping

from the radiator.

CAUTION:

Higher test pressure than specified may cause radiator dam-

age.

CHECKING RADIATOR CAP

1. Inspect the radiator cap.

• Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.

• Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or

the metal retainer.

NOTE:

Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.

2. Pull the negative-pressure valve to open it and check that it

closes completely when released.

• Check that there is no dirt or damage on the valve seat of the

radiator cap negative-pressure valve. 

• Check that there are no abnormalities in the opening and clos-

ing conditions of the negative-pressure valve.

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Testing pressure

: Refer to 

CO-28, "Radiator"

.

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ENGINE MAINTENANCE (VQ35DE)

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3. Check radiator cap relief pressure using suitable tool (A) and

(B).

• Apply water or engine coolant to the cap seal surface before

connecting the radiator cap to the tester, 

• Replace the radiator cap if there is an abnormality in the nega-

tive-pressure valve, or if the open-valve pressure is outside of

the standard values.

CHECKING RADIATOR

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

CAUTION:

• Be careful not to bend or damage the radiator fins.

• When radiator is cleaned on-vehicle, remove surrounding parts in order to access the radiator core.

Tape the harness and harness connectors to prevent water from entering.

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 (5.00 kg/cm

2

, 71.1 psi) and keep distance more than 30 cm

(11.8 in). 

4. Continue to blow air until no water sprays out.
5. Check for engine coolant leaks. Repair as necessary.

ENGINE COOLANT : Changing Engine Coolant

INFOID:0000000009761153

WARNING:

Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter

turn to allow built-up pressure to escape. Carefully remove the cap by turning it all the way.    

DRAINING ENGINE COOLANT

1. Open radiator drain plug (1) at the bottom of radiator and

remove the radiator filler cap. 

CAUTION:

Do not allow the engine coolant to contact the drive belt.

2. Remove water drain plug (A) and copper sealing washer (B). 

CAUTION:

Do not reuse copper sealing washers.

Standard: Refer to 

CO-28, "Radiator"

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ENGINE MAINTENANCE (VQ35DE)

3. For a complete cooling system drain, remove the reservoir tank and drain the engine coolant, and then

clean the reservoir tank before installation.

CAUTION:

Do not allow the engine coolant to contact the drive belt.

4. When performing a complete cooling system drain, remove the

water drain plug (B), connector bolt (C), and copper sealing

washer (A) on the cylinder block.

CAUTION:

Do not reuse copper sealing washers.

NOTE:

• For Canada, water drain plug (B) is a block heater, not a drain

plug.

• Remove water drain plug (D) and copper sealing washer (E)

during engine overhaul.

CAUTION:

Do not reuse copper sealing washers.

5. Check the drained engine coolant for contaminants such as rust, corrosion or discoloration.

• If contaminated, flush the engine cooling system. Refer to FLUSHING COOLING SYSTEM.

REFILLING ENGINE COOLANT

1. Install the radiator drain plug and the reservoir tank, (if removed).
2. Install the water drain plug (A) and copper sealing washer (B).

Tighten water drain plug to specification. 

CAUTION:

Do not reuse copper sealing washers.

: Engine front

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: Engine front

Water drain plug (A)

: 12.3 N·m (1.3 kg-m, 9.0 ft-lb)

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