Nissan Primera P11. Instruction — part 427
Preparation
I
Drill a hole into the attachment (KV10108101).
Disassembly
PISTON AND CRANKSHAFT
1.
Place engine on a work stand.
2.
Drain coolant and oil.
3.
Remove timing belt.
4.
Remove water pump.
5.
Remove oil pan and oil pump.
6.
Remove cylinder head.
7.
Remove pistons with connecting rods.
When disassembling piston and connecting rod, heat piston
to 60 to 70°C (140 to 158°F) or use piston pin press stand at
room temperature.
8.
Remove main bearing cap and crankshaft.
Place the bearings and caps in their proper order.
Upper bearings (cylinder block side) have oil groove.
9.
Remove piston rings with a tool.
SEM707D
SEM895
SEM360D
Piston with connecting rod
Heater
SEM359F
Engine front
Loosen in numerical order
SEM291
CYLINDER BLOCK
CD20T
Preparation
EM-167
Inspection
PISTON AND PISTON PIN CLEARANCE
1.
Measure outer diameter of piston pin and inner diameter of
piston pin hole.
2.
Calculate piston to piston pin clearance.
Pin diameter:
27.994 - 28.000 mm (1.1021 - 1.1024 in)
Pin hole diameter:
27.991 - 27.999 mm (1.1020 - 1.1023 in)
Clearance:
−0.004 to 0 mm (−0.0002 to 0 in)
(Interference fit)
Service parts are available as a set of piston and piston pin.
PISTON RING SIDE CLEARANCE
Side clearance:
Unit: mm (in)
Standard
Limit
Top ring
0.020 - 0.040
(0.0008 - 0.0016)
0.10 (0.0039)
2nd ring
0.050 - 0.085
(0.0020 - 0.0033)
0.10 (0.0039)
Oil ring
0.030 - 0.070
(0.0012 - 0.0028)
0.10 (0.0039)
If out of specification, replace piston and/or piston ring assembly.
SEM024AA
NG
OK
Feeler
gauge
Feeler gauge
Ring
CYLINDER BLOCK
CD20T
Inspection
EM-168
PISTON RING END GAP
End gap:
Unit: mm (in)
Standard
Limit
Top ring
Bore grade 1, 2, 3
0.22 - 0.32 (0.0087 - 0.0126)
Bore grade 4, 5
0.12 - 0.22 (0.0047 - 0.0087)
1.0 (0.039)
2nd ring
0.38 - 0.53 (0.0150 - 0.0209)
0.7 (0.028)
Oil ring
0.30 - 0.55 (0.0118 - 0.0217)
0.6 (0.024)
I
If out of specification, replace piston ring. If gap exceeds maxi-
mum limit with new ring, rebore cylinder and use oversize pis-
ton and piston rings.
Refer to SDS (EM-199).
I
When replacing the piston, check the cylinder block surface for
scratches or evidence of seizure. If scratches or evidence of
seizure is found, hone or replace the cylinder block.
MAIN BEARING CLEARANCE
1.
Install main bearings to cylinder block and main bearing cap.
2.
Install main bearing cap with bearing to cylinder block.
Tighten all bolts in two or three stages.
: 69 - 78 N·m (7.0 - 8.0 kg-m, 51 - 58 ft-lb)
3.
Measure inside diameter “A” of main journal.
4.
Measure outside diameter “Dm” of main journal of crankshaft.
Journal diameter:
Refer to SDS (EM-199).
5.
Calculate main bearing clearance.
Main bearing clearance = A − Dm
Standard:
0.039 - 0.065 mm (0.0015 - 0.0026 in)
I
If it exceeds the limit, replace the bearing.
SEM599A
Piston
Press-fit
Ring
Feeler
gauge
Ring
SEM360F
SEM506A
CYLINDER BLOCK
CD20T
Inspection (Cont’d)
EM-169
I
If crankshaft main journal is worn or shows any abnormality,
regrind crank journal and use undersized bearings to maintain
the specified oil clearance.
I
Refer to SDS for regrinding crankshaft journal diameter
and available service parts (EM-200).
I
When regrinding crankshaft journal, do not grind fillet-roll.
I
If either bearing, crankshaft or cylinder block is replaced with
a new one, select main bearing according to the following
table. These numbers are punched in either Arabic or Roman
numerals.
Main bearing housing grade number
0
1
2
Main bearing grade number
Crankshaft main journal
grade number
0
0
1
2
1
1
2
3
2
2
3
4
Identification color:
Grade 0
Yellow
Grade 1
Green
Grade 2
Brown
Grade 3
Black
Grade 4
Blue
For example:
Main journal grade number: 1
Crankshaft journal grade number: 2
Main bearing grade number = 1 + 2 = 3
Main bearing thickness:
Refer to SDS (EM-200).
CONNECTING ROD BEARING CLEARANCE (Big end)
1.
Install connecting rod bearing to connecting rod and cap.
2.
Install connecting rod cap with bearing to connecting rod.
Apply oil to the threaded portion of bolts and seating surface
of nuts.
: 37 - 45 N·m (3.8 - 4.6 kg-m, 27 - 33 ft-lb)
3.
Measure inside diameter “C” of bearing.
SEM566B
Counter weight
Main journal
.
Maintain more than 0.13 mm (0.0051 in)
SEM706DA
SEM706A
AEM027
Inside micrometer
CYLINDER BLOCK
CD20T
Inspection (Cont’d)
EM-170
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