NISSAN 300ZX 1984 Z31 Engine Lubrication And Cooling System Workshop Manual

ENGINE LUBRICATION &
COOLING SYSTEMS
i
SECTION LC
CONTENTS
ENGINE LUBRICATION SYSTEM
ENGINE LUBRICATION SYSTEM -Oil Pump
ENGINE LUBRICATION SYSTEM -Oil Pressure Relief Valve
ENGINE LUBRICATION SYSTEM
- Lubricating Oil Passage for Turbocharger
COOLING SYSTEM
COOLING SYSTEM -Water Pump
COOLING SYSTEM -Thermostat
COOLING SYSTEM
- Radiator
COOLING SYSTEM -Cooling Fan
COOLING SYSTEM
- Electric Cooling Fan for Turbocharger
SERVICE DATA AND SPECIFICATIONS
(S D S 1
SPECIAL SERVICE TOOLS
LC- 2
LC- 4
LC- 6
LC- 7
LC- 8
1c-10
1c-11
1c-13
LC- 14
1c-15
1c-16
LC-I 8

ENGINE LUBRICATION SYSTEM
Lubrication Circuit
Note
m 011 parrage
011 gallery in cylinder block '1 Additional lubrication circuit for turbocharged model
f--- By-parr parrage
Maan 011 gallery I--
i
r-il
Crankshaft Cylinder head
Turbocharger
+
--/I--
Valve hfter CO""eCll"g Valve lifier guide rod bearing 011 gallery
+ e -0
Rockerrhaft Camshaft Piiton and cylinder well +
Rocker arm
1
1 011 pan 11
SLC544
LC-2

ENGINE LUBRICATION SYSTEM
Oil Pressure Check
Be careful not to burn yourself, as the englne and
oil may be hot
1 Warm up engine
2 Stop engine and remove oil pressure switch
SLC545
3 Install pressure gauge
4 Start engine and check oil pressure with engine
running under no-load
Approximate discharge pressure
I kPa (kglcm2, psi1 Engine rpm
1,200 196 (2.281
2,000 294 (3.431
i 4.000 392 (4.571
Oil pressure at 600 rpm (Idling) should be more
than 78 kPa (0.8 kg/cm2, 11 PSI)
ST25051001 4
In-vehicle service)
The above table shows data tested when SAE
1OW-30 oil is used and oil temperature is between
77 and 83°C (171 and 181°F). Slight difference
will
be found because of oil viscosity or oil tem-
perature If difference is extreme, check oil passage
and
oil pump for oil leaks
LC-3

ENGINE LUBRICATION SYSTEM -Oil Pump-
Disassembly and Assembly
1
1. Drain oil.
2. Remove oil pan.
In case of on-vehicle service, refer to Oil Pan
for removal
in section EM
3. Remove oil pump assembly
Always replace with new oil seal and gasket.
When installing
oil pump, apply engine oil to inner
and outer gear.
Be sure that O-ring is properly fitted on.
R
IO 6.07.4.3-5 1
L(nl 12-16 11.2. 16.
9.121 N rn lkg-m ft-lbl
SLC547
Front I
(1 6 -2 1.12-151
R 4.5 I04 -05.2 9 -361
R N rn Ikg-m ft-lbl
SLC548
LC-4

ENGINE LUBRICATION SYSTEM -Oil Pump-
Visually inspect components for wear and
damage
Check
oil pressure regulator valve sliding sur-
face and valve spring
Washer Spr'ng 7
Regulalor, ,/ valve
SLC295
Using a feeler gauge, check the following clear-
ance
SLC550
tion
If it exceeds the limit, replace gear set or entire oil
pump assembly.
Unit rnrn (in)
I 011 -020(00043 000791 Body to outer gear
clearance
(i7
Outer gear to crescent 0 21 - 0 32 (0 0083 0 0126)
LC-5

ENGINE LUBRICATION SYSTEM - Oil Pressure Relief Valve
Inspection
1
Inspect for its smooth operation by pushing ball
-- _A
SLC551
LC-6

ENGINE LUBRICATION SYSTEM
-Lubricating
Oil Passage for Turbocharger-
Disassembly and Assembly
Always replace with new gasket.
After installation, run engine for
a few minutes and check for leaks
Lm 8-17 108.1 1.58-801
N m (kg-m. ft-lbl
SLC552
LC-7

COOLING SYSTEM
Coolicg Circuit
To avoid danger of being scalded, never attempt to drain coolant when engine is hot.
Always replace with new gasket and O-ring.
V
Radlaror
f
+ -
Thermostat
water OuIlet Thermostat
housing
1 Thermostat Open
Thermostat Closed
I intake manifold
(Water parragel Heater
Cylinder block Cylinder head t
SLC553
LC-8

COOLING SYSTEM
-Changing Engine Coolant
Refer to Changing Engine Coolant in section
MA If the hoses connecting engine and heater
have
been disconnected to dismount heater core
unit and engine. always perform the following
work before filling with engine coolant
Set the heater temperature lever or button to
"Full Hot" position
Disconnect the upper hose from water cock,
and
fill the heater core unit with 500 mP (16.9
US fl 02, 17 6 Imp fl 02) or more of coolant
1
2
DO not remove englne ter
SLC609 v
3 Connect the hoses.
-Checking Cooling Systern-
WARNING:
Never remove the radiator cap when the engine
IS
hot, serious burns could be caused by high pressure
fluid escaping from the radiator
Wrap
a thick cloth around cap and carefully re-
move the cap by turning it a quarter turn to allow
built-up pressure
to escape and then turn the cap
all the way off.
CHECKING COOLING SYSTEM HOSES
Check hoses for proper attachment, leaks, cracks,
damage,
loose connections, chafing and deteriora-
tion
CHECKING COOLING SYSTEM FOR LEAKS
Apply pressure to the cooling system by means of
a tester to check for leakage
Test i ng pressure.
157 kPa (1 6 kg/cm2, 23 psi)
CHECKING RADIATOR CAP
Apply pressure to radiator cap by means of
a cap
tester to see if it is satisfactory
Radiator cap relief pressure:
59 - 98 kPa (0.6 - 1.0 kglcm' , 9 - 14 psi)
" SLC613
LC-9

COOLING SYSTEM -Water Pump-
Drain coolant from right side drain cocks on cylin-
der block and radiator CAUTION.
When removing water pump assembly, be careful
16- 21 N m I1 6 2 1 kgm. 12- Eft-lbl Always replace with new gasket.
To avoid deforming timing cover, make sure there
is adequate clearance between cover and hose
clamp.
After installing water pump, connect hose
and
tester.
SLC554
Inspection
end play and rough operation clamp securely, then check for leaks using cap
LC-10