Qashqai J11. Engine mechanical (HRA2DDT, K9K, MR20DD)

CYLINDER BLOCK

EM-449

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

13.

Remove piston base cooling jets (1) following this procedure:

CAUTION:

Wear goggles with side protectors for this operation.

• Drill the piston base coolibg jets using a [7 mm (0.3in)] diame-

ter drill bit.

NOTE:
Do not take out the ball from the piston base cooling nozzle, oth-
erwise swarf may enter the lubrification circuit
• Remove the spring tappet (1) and the springs (2) without tak-

ing out the ball (3).

• Remove any swarf present with a brush with non abrasive

bristles and a compressed air nozzle.

• Screw the tool [SST: Mot. 1485-01] (1) into the drilled piston

base cooling jets using a [6 mm (0.2 in)] Allen key, which
slides into the tool [SST: Mot. 1485-01].

• Screw the tool [SST: Emb. 880] (1) on the tool [SST: Mot.

1485-01].

• Remove the piston base cooling jets.
• Fit a blanking plug whenever a piston base cooling jet is

removed.

Assembly

Fully air-blow engine coolant and engine oil passages in the cylinder block, cylinder bore and crankcase
to remove any foreign matter.

CAUTION:

Use a goggles to protect your eye.

Install the new piston base cooling jet following procedure:

Remove the blanking plugs.

Use pressurised air and clean cloths to clean the oil circuit, the cylinders and the joint faces to ensure
there is no swarf present.

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EM-450

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

c.Description of the tool [SST: Mot. 1972]

The tool [SST: Mot. 1972] consists of :

• a plate (1),
• a plate bolt (2),
• a pushrod (3),
• an end piece (4),
• a system nut-screw (5).

• Fit the plate (1) of the tool [SST: Mot. 1972] on the cylinder

block without tihten the bolts (2)

• Fit the piece of the tool [SST: Mot. 1972] in the push-rod of the

tool [SST: Mot. 1972].

• Place the "end piece - pushrod" (1) assembly of the tool [SST:

Mot. 1972] in the plate to centre the plate above the opening of
the piston base cooling jet.

• Tighten the plate bolts.
• Remove the "end piece - pushrod" assembly from the plate.

• Insert the piston base cooling jet in the pushrod.
• Place the "pushrod - piston base cooling jet" assembly in the

plate by presenting the jet in front of its opening.

• Fit the system nut-screw (1) on the plate.
• Tighten the bolt (2) to has retaining wall of the pushrod on the

plate.

• Remove the tool [SST: Mot. 1972].

Install main bearings and thrust bearings with the following procedure:

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CYLINDER BLOCK

EM-451

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

Remove dust, dirt, and engine oil from the bearing mating surfaces of the cylinder block and main bearing
cap.

Centre the grooved bearing shell on bearing No.1 of the cylinder block while aligning the groove of the
bearing shell with the hole of the bearing.
• Secure the flush bearing shell and push from the opposite side

the position of the bearing shell flush with the bearing.

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EM-452

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

Measure the distance (X1) between the bearing face (1) and the edge of the bearing shell at points (A),
(B) and (C) using a depth gauge.

If necessary, adjust the position of the bearing shell to the value (X1) = [179 mm (7.0 in)].

Repet the previous operations for the bearing shells of the bearings No 2, 4 and 5.

If necessary, adjust the position of the bearing shells:
- of bearings No. 2 and 4 to the value (X2) = [88 mm (3.5 in)].
- of the bearing No. 5 to the value (X1) = [176 mm (6.9 in)].

Place:

• a rectified shim (1) against the mating face of the crankshaft

thrust washer on bearing No.3

• the grooved bearing shell against the rectified shim.

• Secure the flush bearing shell against the rectified shimat (2) and push from the opposite side to posi-

tion the bearing shell flush with the bearing..

• Mesure the distance (X3) between the bearing face of the

thrust washer and the bearing shell edge using a depth gauge.

• Centre the grooved bearing shell on the bearing, aligning the

shell with the hole groove.

• Adjust the position of the bearing shell at points (A), (B) and

Place:

• the bearing cap on a bench,
• a non-grooved bearing shell against the bench.

• Secure the flush bearing shell with the bearing cap at (1) and

push from the opposite side to bring the bearing shell flush
with the bearing cap.

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CYLINDER BLOCK

EM-453

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

• Measure the distance (X4) between the edge of the bearing

shell and the wall of the bearing cap at points (A), (B) and (C)
using a depth gauge.

• Adjust the position of the bearing shell at point (A), (B) and

using a set of feeler gauges (feeler gauges (thichness of the
shim (1) = X4 : [2 mm (0.1 in)]

• Repeat the previous operations for the other bearing caps.

• Position the crankshaft thrust washers on the cylinder block

(washer plug (1) in the cylinder block notch)

• Use engine oil to lubricate the crankshaft journal bearing

shells and thrust washers (only the face making contact with
the crankshaft).

NOTE:
Ensure the bearing shells and the thrust washers do not move
when refitting the crankshaft and bearing caps.

Install crankshaft, the bearing caps and the crankshaft bearing bolts.
NOTE:
Check that the bearing caps are in contact with the cylinder block before tightening the bearing cap bolts.

Install main bearing caps with the following procedure:

Align the identification number to the journal position to install as
shown in the figure.

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: Engine front

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EM-454

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

Tighten new main bearing cap bolts in numerical order as shown
in the figure with the following procedure:

Pretighten main bearing cap bolts.

Tighten main bearing cap bolts.

CAUTION:

Be sure to check that the main bearing cap is in contact with the cylinder block before tightening
the bolts.

ii.

Turn bolts 110 degrees clockwise (angle tightening).

CAUTION:

Confirm the tightening angle by using an angle wrench
[SST: KV10112100 ( — )] (A) or protractor. Never judge by
visual inspection without the tool.

• After installing mounting bolts, check that crankshaft can be rotated smoothly by hand.
• Check crankshaft end play. Refer to

EM-459, "Inspection"

• If replacing the crankshaft, always identify the piston height category to refit in each cylinder to garantee that

the piston protusion in relation to the cylinder block remains within the tolerance, before refitting the con rod
- piston assemblies. Refer to

EM-459, "Inspection"

Install piston to connecting rod with the following procedure:

Install snap ring to the groove of the piston rear side.
• Insert it fully into the groove.

Assemble piston to connecting rod.
• Point the mark engraved (A) on the piston head facing and the

bosses (B) of the big end as shown in the figure.

• Piston pin can be pushed in by hand without excessive force.

From the front to the rear, insert piston pin into piston and con-
necting rod.

Install snap ring to the groove of the piston front side.
• Insert it fully into the groove.
• After installing, check that connecting rod moves smoothly.

Using a piston ring expander (commercial service tool), install piston rings.

CAUTION:

• Be careful not to damage piston.
• Be careful not to damage piston rings by expanding them excessively.

: Engine front

: 25.0 N·m (2.6 kg-m, 18 ft-lb)

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: Engine front

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CYLINDER BLOCK

EM-455

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

• Position each ring with the gap as shown in the figure referring

to the piston front mark.

• Fit the scraper ring (1) with the hand by way of the con rod.

• Lubricate piston pin with engine oil.
• Position the con rod in relation to the piston (piston marking (1)

"V" is opposite the machined bosses (2) on the big end)

NOTE:
Piston marking V engine flywheel end, Con rod marking
(machined bosses) timing end.

10. Engage the pin in the piston and in the samll end.

NOTE:
Check that the piston pin slides and rotates easily in the piston and the small end.

11.

• Refit the locking spring ring to the piston pin using a flat screw-

driver (apply pressure in the groove (1)).

NOTE:
Position the opening in the locking spring ring towards the piston
crown.

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EM-456

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

12.

Place:

• the con rod body on the bench,
• the con rod upper bearing shell (width = [18.2 mm (0.7 in)]

• Secure the flush bearing shell of the con rod body mating face

on side (1) and push from the opposite side until the con rod
body mating face is flush.

Place:

• the con rod cap on the bench,
• the con rod lower bearing shell (width = [18.2 mm (0.7 in)]

• Secure the flush bearing shell of the con rod cap mating face on side (2) and push from the opposite

side until the con rod cap mating face is flush.

13.

• Mesure the distance (X) between the edge of the bearing shell

and the wall of the con rod body at points (A), (B) and (C).

14.

• Centre the bearing shell on the con rod body.
• Adjust the position of the bearing shell at points (A), (B) and

• Repeat the previous operations on the remaining con rod bod-

ies and caps

Lubricate with engine oils:

• the cylinder block barrels,
• the piston rings
• the piston skirts,
• the crankshaft crankpins

• Orient the piston rings on the piston pin axis.

15. Lubricate the tool [SST: Mot.1979].

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CYLINDER BLOCK

EM-457

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

16.

• Check that the piston rings are correctly engaged in the piston

grooves

• Put the piston on a plane and clean surface.
• Verify the absence of over lap (1) of the tips of the scraper

ring.

NOTE:
Manipulate the piston exclusively by the skirt or the con rod,
without touching the scraper ring.

17.

• Insert the tool [SST: Mot.1979] (1) on the piston, conical part

the first one, by the con rod.

NOTE:
The engagement of the tool [SST: Mot.1979] on the piston has
to be made without forcing. If resistance during the engagement
occures, put off the tool and to re-engage it.

18.

• Check that the pistons correspond to the cylinder block barrels

(No. 1 timing end)

• Place the "con rod - piston - tool" (1) assembly in the cylinder.
NOTE:
Position the point of the "V" engaged on the piston towards the
flywheel end.

19.

WARNING:

Failure to observe the following procedure may result in destruction of the engine.
• Gradually insert the "con rod - piston" assembly in the cylinder ( avoid any contact between the con rod

and the piston base cooling jet) using only of the hand.

• Position the big end on the crankshaft crankpin.
• Refit the con rod cap, ensuring that the con rod caps and bodies correspond. Refer to

EM-459, "Inspec-

tion"

20.

Tighten new connecting rod cap bolts.

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: 25.0 N·m (2.6 kg-m, 18 ft-lb)

EM-458

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

CYLINDER BLOCK

Turn bolts 110 degrees clockwise (angle tightening).

CAUTION:

Confirm the tightening angle by using an angle wrench
[SST: KV10112100 ( — )] (A) or protractor. Never judge by
visual inspection without the tool.

• After tightening connecting rod cap bolt, check that crankshaft rotates smoothly.
• Check the connecting rod side clearance. Refer to

EM-459, "Inspection"

• Check the piston protrusion. Refer to

EM-459, "Inspection"

21. Install oil pump and related parts.

22. Install oil pan (upper). Refer to

EM-437, "Exploded View"

23. Install rear oil seal retainer with the following procedure:

Set guide bolt (A) and protector (B) to rear oil seal retainer (1).
NOTE:
The protector is supplied in the new oil seal parts kit.

Move the rear oil seal retainer evenly by hand until it makes con-
tact with the cylinder block.

Tighten mounting bolts in two steps separately in numerical
order as shown in the figure.

Tighten mounting bolts No.1 and 5.

ii.

Tighten mounting bolts No. 1 to 8 in numerical order as shown.

24. Install pilot bushing.

• Using the drift, force fit the pilot bushing until its front end contacts crankshaft.

25. Install flywheel by aligning the mark (1).

NOTE:
The openings of the flywheel bolts must be aligned.

Install bolts without tightening them.

Fix flywheel using flywheel locking tool [SST: — (Mot.1431)].

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: 5.0 N·m (0.51 kg-m, 44 in-lb)

: 12.0 N·m (1.2 kg-m, 106 in-lb)

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CYLINDER BLOCK

EM-459

< UNIT DISASSEMBLY AND ASSEMBLY >

[R9M]

Tighten bolts in numerical order as shown in the figure with the
following procedure:

Tighten mounting bolts.

ii.

Turn 50 degrees clockwise (angle tightening).

26. Install drive plate.

Install bolts without tightening them.

Fix drive plate using flywheel locking tool [SST: — (Mot.1431)].

Tighten bolts in numerical order as shown in the figure with the
following procedure:

Tighten mounting bolts.

27. Assemble in the reverse order of disassembly.

Inspection

INFOID:0000000010282026

CRANKSHAFT END PLAY

• Measure the clearance between thrust bearings and crankshaft

arm when crankshaft is moved fully forward or backward with a dial
indicator (A).

• If it exceeds the standard, replace thrust bearings, and measure

again. If it still exceeds the standard, also replace crankshaft.

CRANKSHAFT PIN JOURNAL DIAMETER

• Measure the outer diameter of crankshaft pin journal with a

micrometer (A).

• If it exceeds the standard, measure the connecting rod bearing oil

clearance. Refer to “CONNECTING ROD BEARING OIL CLEAR-
ANCE”.

CRANKSHAFT MAIN JOURNAL DIAMETER

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

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: 50.0 N·m (5.1 kg-m, 37 ft-lb)

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Standard

: Refer to

Qashqai J11. Engine mechanical (HRA2DDT, K9K, MR20DD) - part 29