Nissan Primera P11. Manual — part 407
Removal
NLEM0131
1.
Release fuel pressure.
Refer to EC-SR-31, “Fuel Pressure Release”.
2.
Remove engine under covers.
3.
Remove front RH wheel and engine side cover.
4.
Drain coolant by removing cylinder block drain plug and radia-
tor drain cock. Refer to MA-29, “Changing Engine Coolant”.
5.
Remove radiator.
6.
Remove air duct to intake manifold.
7.
Disconnect the following parts:
I
Vacuum hoses
I
Fuel hoses
I
Wires
I
Harness
I
Connectors
I
Front exhaust tube
8.
Remove all spark plugs.
9.
Remove rocker cover bolts in numerical order.
10. Remove rocker cover.
11. Remove intake manifold supports.
12. Remove water pipe assembly.
SEM029G
Engine
front
Loosen in numerical order.
Rocker cover
SEM030G
Intake manifold
supports
SEM065G
Intake
manifold
CYLINDER HEAD
SR20DE
Removal
EM-87
13. Set No. 1 piston at TDC of its compression stroke.
I
Rotate crankshaft until mating mark on camshaft sprocket
is set at position indicated in figure.
14. Remove chain tensioner.
15. Remove distributor.
Do not turn rotor with distributor removed.
16. Remove camshaft sprockets.
I
For retiming in cylinder head removal, apply paint mark to
timing chain matched with mating marks of camshaft
sprockets.
SEM983C
SEM031G
Mating mark
Mating mark
RH camshaft sprocket
LH camshaft sprocket
.
SEM032G
Chain
tensioner
SEM033G
Rotor head position
(No. 1 cylinder at TDC)
SEM034G
CYLINDER HEAD
SR20DE
Removal (Cont’d)
EM-88
17. Remove camshaft brackets and camshafts.
I
Mark these parts’ original positions for reassembly.
18. Remove starter motor.
19. Remove the following water hoses:
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Water hose for cylinder block.
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Water hoses for heater.
20. Remove cylinder head outside bolts.
21. Remove cylinder head bolts in numerical order.
I
Removing bolts in incorrect order could result in a warped
or cracked cylinder head.
I
Loosen cylinder head bolts in two or three steps.
22. Remove cylinder head completely with intake and exhaust
manifolds.
Disassembly
CAUTION:
I
When installing camshafts, chain tensioners, oil seals or
other sliding parts, lubricate contacting surfaces with new
engine oil.
I
When tightening cylinder head bolts, camshaft sprocket
bolts, cramshaft pulley bolt and seat surfaces, lubricate
with new engine oil.
I
If a hydraulic lash adjuster is kept on its side, there is a
risk of air entering it. After removal, always set hydraulic
SEM035G
Engine
front
RH camshaft
Camshaft bracket
LH camshaft
Loosen in numerical order.
SEM036G
SEM037G
Water outlet
Water inlet
SEM978C
SEM878CA
OK
NG
CYLINDER HEAD
SR20DE
Removal (Cont’d)
EM-89
lash adjuster straight up, or keep it soaked in new engine
oil.
I
Do not disassemble hydraulic lash adjusters.
I
Attach tags to lash adjusters so as not to mix them up.
1.
Remove rocker arms, shims, rocker arm guides and hydraulic
lash adjusters from cylinder head.
CAUTION:
Keep parts in order so that they can be installed in their origi-
nal positions during assembly.
2.
Remove exhaust manifold cover.
3.
Remove exhaust manifold.
4.
Remove water outlet.
5.
Remove intake manifold.
6.
Remove thermostat housing with water pipe.
SEM202D
Rocker arm guide
Rocker arm
Shim
Hydraulic
lash adjuster
SEM059G
Loosen in numerical order.
.
SEM082D
Water
outlet
SEM061G
Loosen in numerical order.
NEM215
Water pipe
Thermostat
housing
CYLINDER HEAD
SR20DE
Disassembly (Cont’d)
EM-90
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