Nissan Titan. Manual - part 315

 

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Nissan Titan. Manual - part 315

 

 

EM-64

< REMOVAL AND INSTALLATION >

CAMSHAFT

a. Squeeze return-proof clip ends using suitable tool and push the

plunger into the tensioner body.

b. Secure plunger using stopper pin.

• Stopper pin is made from hard wire approximately 1 mm (0.04

in) in diameter.

c.

Remove the bolts and the chain tensioner.

NOTE:

• Stop plunger in the fully extended position using return-proof clip

(1) if stopper pin is removed.

• Push the plunger (2) into the chain tensioner body while squeezing

the return-proof clip (1). Secure it using stopper pin (3).

12. Remove the chain tensioner cover from the front cover using

Tool.

CAUTION:

Do not damage mating surfaces.

13. Remove the chain tensioner (RH) using the following steps.

WARNING:

Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding

plunger head. It may cause serious injuries. Always hold plunger head when removing.

a. Squeeze return-proof clip ends using suitable tool and push the

plunger into the chain tensioner body.

b. Secure plunger using stopper pin.

• Stopper pin is made from hard wire approximately 1 mm (0.04

in) in diameter.

KBIA2479E

KBIA2483E

Tool number

: KV10111100 (J-37228)

KBIA2521E

KBIA2479E

CAMSHAFT

EM-65

< REMOVAL AND INSTALLATION >

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c. Remove the bolts and the chain tensioner (RH) (A).

NOTE:

If it is difficult to push plunger on chain tensioner (RH) (A),

remove the plunger under extended condition.

14. Loosen camshaft sprocket bolts as shown and remove camshaft

sprockets.

CAUTION:

To avoid interference between valves and pistons, do not

turn crankshaft or camshaft with timing chain discon-

nected.

15. Remove the (RH) (A) front cover bolts and the (LH) (B) front

cover bolts.

16. Remove (RH) (A) camshaft bracket bolts and (LH) (C) camshaft

bracket bolts in the reverse of order shown to remove camshaft

brackets.

• Remove No. 1 camshaft bracket.

NOTE:

The bottom and front surface of bracket will be stuck because

of liquid gasket.

WBIA0705E

KBIA2485E

WBIA0706E

: Engine front

(B) : Exhaust side
(D) : Intake side

WBIA0707E

EM-66

< REMOVAL AND INSTALLATION >

CAMSHAFT

17. Remove the camshaft.
18. Remove the valve lifters if necessary.

• Correctly identify location where each part is removed from. Keep parts organized to avoid mixing them

up.

INSPECTION AFTER REMOVAL

Camshaft Runout

1. Put V block on precise flat work bench, and support No. 1 and

No. 5 journals of the camshaft.

2. Set dial indicator vertically to No. 3 journal.
3. Turn the camshaft to one direction, and measure the camshaft

runout on dial indicator (total indicator reading).

• If measurement exceeds specification, replace the camshaft.

Camshaft Cam Height

• Measure the camshaft cam height.

• If measurement is not within the specifications, replace the cam-

shaft.

Camshaft Journal Clearance

 Camshaft Journal Diameter

• Measure the diameter of the camshaft journal.

Camshaft Bracket Inner Diameter

• Tighten the camshaft bracket bolt to the specified torque.

• Measure the inner diameter (A) of the camshaft bracket.

Calculation of Camshaft Journal Clearance

(Journal clearance) = (camshaft bracket inner diameter) – (camshaft

journal diameter)

• If measurement is not within specification, replace either or both

camshaft and cylinder head.

Camshaft runout

: Less than 0.02 mm (0.0008 in)

EMK0641D

Standard cam height 
(intake)

: 44.865 - 45.055 mm 
(1.7663 - 1.7738 in)

Standard cam height (ex-
haust)

: 45.075 - 45.265 mm 
(1.7746 - 1.7821 in)

Cam wear limit
(intake & exhaust)

: 0.02 mm (0.0008 in)

PBIC0039E

Standard diameter : 25.950 - 25.970 mm 

(1.0217 - 1.0224 in)

PBIC0040E

Standard

: 26.000 - 26.021 mm (1.0236 - 1.0244 in)

Standard

: 0.030 - 0.071 mm (0.0012 - 0.0028 in)

PBIC1645E

CAMSHAFT

EM-67

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NOTE:

The inner diameter of the camshaft bracket is manufactured together with the cylinder head. Replace the

whole cylinder head as an assembly.

Camshaft End Play

• Install dial gauge in the thrust direction on the front end of the cam-

shaft. Measure the end play when the camshaft is moved forward/

backward (in direction to axis).

• If measurement is out of the specified range, replace the camshaft

and measure again.

• If measurement is still out of the specified range, replace the cylin-

der head.

• Measure the following parts if end play is outside the specified

value.

- Dimension (A) for camshaft No. 1 journal

- Dimension (B) for cylinder head No. 1 journal

• If measurements are not within specification, replace the camshaft

and/or cylinder head.

Camshaft Sprocket Runout

1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.

• If measurement exceeds the specification, replace the cam-

shaft sprocket.

Valve Lifter

Check if the surface of the valve lifter has any wear or cracks.

• If any damage is found, replace the valve lifter.

• Select the thickness of the head so that the valve clearance is

within the standard when replacing. Refer to 

EM-19, "Valve Clear-

ance"

.

Valve Lifter Clearance

 Valve Lifter Diameter

Standard

: 0.115 - 0.188 mm (0.0045 - 0.0074 in)

PBIC0042E

Standard

: 30.500 - 30.548 mm (1.2008-1.2027 in)

Standard

: 30.360 - 30.385 mm (1.1953-1.1963 in)

KBIA2426J

Runout

: Less than 0.15 mm (0.0059 in)

KBIA0181J

KBIA0182E

 

 

 

 

 

 

 

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