Nissan Frontier. Manual — part 747
TIMING CHAIN
EM-177
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1. Set No. 1 cylinder to TDC.
• Rotate crankshaft pulley clockwise to align timing mark (A)
(grooved line without color) with timing indicator (B).
2. Remove front timing chain case. Refer to
EM-168, "Removal and Installation"
.
3. Check timing chain markings to confirm No. 1 cylinder is at TDC of its compression stroke.
• If not, remove Ring Gear Stopper Tool and turn crankshaft clockwise 360
° (one revolution).
• Re-install Ring Gear Stopper Tool.
• If the original timing chain markings are not legible, use paint or equivalent to mark the timing chains to
the sprockets.
4. If removing the secondary timing chains, loosen camshaft sprocket bolts.
5. Compress the primary timing chain tensioner.
1. Loosen clip of primary timing chain tensioner, and release
plunger stopper (1).
2. Depress plunger into tensioner body by pressing slack
guide (2).
3. Keep slack guide pressed and insert stopper pin through
the tensioner body hole and plunger groove (3) to hold
plunger in.
NOTE:
Use stopper pin included with Tool J-50246.
6. Remove internal chain guide.
7. Remove timing chain (primary).
CAUTION:
AWBIA0719ZZ
Tool number
: KV11105210 (J-44716)
PBIC2919E
PBIC2266E
EM-178
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TIMING CHAIN
After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.
8. Remove crankshaft sprocket, if necessary.
9. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach stopper pin to the right and left timing chain tensioners
(secondary).
NOTE:
• Use stopper pin included with Tool J-50246.
b. Remove camshaft sprocket (INT and EXH) bolts.
c.
Remove timing chain (secondary) together with camshaft sprockets.
• Turn camshaft slightly to secure slack of timing chain on timing chain tensioner (secondary) side.
• Insert 0.5 mm (0.020 in)-thick metal or resin plate between tim-
ing chain and timing chain tensioner plunger (guide). Remove
timing chain (secondary) together with camshaft sprockets
with timing chain loose from guide groove.
CAUTION:
Be careful of plunger coming off when removing timing
chain (secondary).
NOTE:
Camshaft sprocket (INT) is a one piece integrated design with
sprockets for timing chain (primary) and for timing chain (sec-
ondary).
• When handling camshaft sprocket (INT), be careful of the fol-
lowing:
CAUTION:
• Handle carefully to avoid any shock to camshaft
sprocket.
• Do not disassemble. (Do not loosen bolts (A) as shown).
NOTE:
For removal of timing chain tensioner (secondary), refer to
185, "Removal and Installation (Secondary Timing Chain Ten-
. [Removing camshaft bracket (No. 1) is required.]
INSPECTION AFTER REMOVAL
Check for cracks and any excessive wear at link plates. Replace
chain if necessary.
• Inspect all timing chains and associated parts for wear or damage,
replace as necessary.
INSTALLATION
PBIC2047E
PBIC1978E
PBIC2920E
PBIC0282E
TIMING CHAIN
EM-179
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NOTE:
The figure above shows the relationship between the mating mark on each timing chain and that on the corre-
sponding sprocket, with the components installed.
1. Make sure that dowel pin hole, dowel pin of camshaft and crank-
shaft key are located as shown. (No. 1 cylinder at compression
TDC)
NOTE:
Though camshaft does not stop at the position as shown, for the
placement of cam nose, it is generally accepted camshaft is
placed for the same direction of the figure.
2. Install timing chains (secondary) and camshaft sprockets as follows:
CAUTION:
Mating marks between timing chain and sprockets slip easily. Confirm all mating mark positions
repeatedly during the installation process.
1.
Internal chain guide
2.
Camshaft sprocket (intake)
3.
Mating mark (blue link)
4.
Mating mark (punched)
5.
Secondary timing chain tensioner
6.
Mating mark (copper link)
7.
Secondary timing chain
8.
Camshaft sprocket (exhaust)
9.
Tensioner guide
10. Water pump
11. Crankshaft sprocket
12. Mating mark (notched)
13. Primary timing chain
14. Slack guide
15. Primary timing chain tensioner
16. Mating mark (back side)
17. Crankshaft key
Camshaft dowel pin hole (intake side)
: At cylinder head upper face side in each bank.
Camshaft dowel pin (exhaust side)
: At cylinder head upper face side in each bank.
Crankshaft key
: At cylinder head side of right bank.
AWBIA1011GB
KBIA1073E
EM-180
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TIMING CHAIN
a. Push plunger of timing chain tensioner (secondary) and keep it
pressed in with stopper pin.
• Use stopper pin included with Tool J-50246.
b. Before installing timing chains (secondary) and camshaft
sprockets, confirm mating marks are visible. If necessary, use
paint or equivalent to re-mark the camshaft sprockets at each
mating mark.
c.
Install timing chains (secondary) (8) and camshaft sprockets
[INT (1) and EXH (9)].
• Left bank mating marks (6)
• Align the timing chain mating marks (secondary) (2) (blue
color link) with the ones on camshaft sprockets (INT and EXH)
(4), (5), (7) and (10) (punched), and install them.
NOTE:
• Mating marks for camshaft sprocket (INT) are on the back
side of camshaft sprocket (secondary).
• There are two types of mating marks, circle (7), (10) and
oval (4), (5) types. They should be used for the right and left
banks, respectively.
• Align dowel pin (3) and pin hole on camshafts with the groove
(11) and dowel pin on sprockets, and install them.
• On the intake side, align pin hole on the small diameter side of
the camshaft front end with dowel pin (3) on the back side of
camshaft sprocket, and install them.
• On the exhaust side, align dowel pin on camshaft front end
with pin groove (11) on camshaft sprocket, and install them.
• In case that positions of each mating mark and each dowel pin
do not fit on mating parts, make fine adjustment to the position by slightly turning camshaft(s).
• Bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is enough to
prevent the dislocation of dowel pins.
d. Confirm the mating marks are aligned, then finger tighten camshaft sprocket bolts. Final tightening will be
done with all timing chains installed.
SEM430G
SEM811G
Right bank
: Use circle type (7) and (10).
Left bank
: Use oval type (4) and (5).
WBIA0689E
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