Note: The figure shows the relative positions of the timing marks on the drive chain and the corresponding sprockets after the components have been installed.
1. Gas distribution mechanism drive chain.
2. Exhaust camshaft sprocket.
3. Timing chain tensioner shoe.
4. Timing chain tensioner.
5. Oil pump drive chain.
6. Oil pump sprocket.
7. Crankshaft sprocket.
8. Drive chain tensioner.
9. Intake camshaft sprocket.
A. Dark blue link.
B. Installation mark (stamp).
S. Orange Link.
D. Installation mark (stamp).
E. Crankshaft key (directed upwards).
F. Installation mark (side knurling).
G. Dark blue link.
1. Install the crankshaft sprocket and oil pump drive parts:
(The original is posted on the portal: nissanbook.ru)
Install the crankshaft sprocket (1), oil pump drive chain (2) and oil pump sprocket (3) simultaneously.

Note: Arrow points to the front of the engine.
Install the crankshaft sprocket so that the side with the pseudo gear (A) faces the rear of the engine.
Install the oil pump sprocket so that the hexagon side (B) faces the engine bore.
Note: There are no timing marks on the oil pump drive components.
Hold the top of the oil pump shaft with a Torx bit (size: E8), tighten the oil pump sprocket nuts.
1. Crankshaft sprocket.
2. Oil pump drive chain.
3. Oil pump sprocket.
Install the chain tensioner (1and insert the housing onto the axle (B), while inserting the spring into the locking hole (A) on the front surface of the cylinder block. Make sure that the oil pump drive chain is tensioned after installation.

2. Install the timing chain:
Install the chain by aligning all the corresponding skeins on the links and sprockets.
A. Dark blue link.
B. Installation meta (stamp).
S. Orange Link.
D. Installation mark (stamp).
E. Crankshaft key (directed upwards).
F. Installation meta (side knurling).
G. Dark blue link.
If the alignment marks do not match, turn the camshaft slightly to correct the position.
Recheck the position of the timing marks on each sprocket and timing chain after installing the chain, holding it with your hands.
To avoid skipping the teeth of the sprocket in the drive chain, do not rotate the crankshaft and camshaft until the front engine cover is installed.
3. Install the tensioner shoe (1) and the drive chain guide (2).

4. Install the drive chain tensioner mechanism (1):

Lock the plunger in the fully compressed position using the locking pin (A), then install the tensioner mechanism.
Carefully remove the locking pin after the tensioner mechanism is installed.
5. Check the position of the adjusting windings of all sprockets and the drive chain again.
6. Install the front crankshaft oil seal into the front cover,
7. Install the front engine cover:
Apply a continuous bead of sealant to the front engine cover installation surfaces as shown in the illustration.
Note: Use genuine Nissan sealant or equivalent.
1. Cylinder head.
2. Cylinder block.
3. Upper part of the oil pan.
A. Sealant application areas (∅ 3.0-4.0 mm).
Apply a continuous bead of sealant to the front engine cover.
Note: Use genuine Nissan sealant or equivalent.
A. Area of sealant application (03.0-4.0 mm).
Tighten the bolts in the sequence shown.
After tightening the bolts, it is necessary to check their tightening value again in the specified sequence.

Attention: It is necessary to remove excess sealant from the surfaces.
8. Insert the crankshaft pulley, aligning it with the crankshaft key.
Note: When using a plastic hammer to install the crankshaft pulley, be sure to tap the center of the pulley (not on the edges).
Caution: When installing, be careful not to damage the edges of the front oil seal.
9. Tighten the crankshaft pulley bolt:
Note: To tighten the crankshaft pulley bolt, secure the pulley with a special holder.
Apply fresh engine oil to the threads and seating surfaces of the crankshaft pulley bolt.
Tighten the crankshaft pulley bolt to 35.0 Nm.
Apply a paint mark (B) to the crankshaft pulley opposite any corner mark (A) corresponding to the six edges of the bolt (1).

Tighten the bolt another 60° clockwise (tightening angle), using the corner marks as a guide.
10. Make sure that the crankshaft rotates freely clockwise by hand.
11. Install the remaining parts in the reverse order of removal.