1987 SUZUKI GRAND VITARA low oil pressure

3-2. ENGINE SERVICES NOT REQUIRING ENGINE REMOVAL
The following parts of components do not require engine removal to receive services (replacement, inspec-
tion or adjustment):
Part or ComponentNature of Service1
1. Spark plug
2. Distributor
Replacement or inspection
Replacement, inspection or adjustment
1 3. Exhaust manifold1 Replacement or inspectionI
I 4. Oil filter1 ReplacementI
1 5. Oil pressure unit( Replacement
6. Cylinder head cover1 ReplacementI
I7. Rocker shaft1 Replacement or inspectionI
8. Rocker-arm
9. Rocker-arm spring
Replacement or inspection
Replacement or inspectionI
10. Cam shaft
11 Cylinder head
I12. Radiator
Replacement or inspection (Cylinder head removal required)
Replacement or inspection
Replacement or inspection (Cooling fan and fan shroud
removal required)I
13. Cooling fan
14. Camshaft timing belt pulley
Replacement
Replacement or inspection
I
15. Crankshaft timing belt pulley
16. Timing beltReplacement or inspection (Cooling fan and fan shroud
1 Replacement or inspection
removal required)
17. Fuel pump
18. Carburetor
Replacement
Replacement, inspection or adiustment
19. Intake manifold1 ReplacementI
20. Alternator
21. Starter motor
Replacement or inspection
22. Fan belt
23. Water pump
Replacement, inspection or tension adjustment
Replacement (Cooling fan and fan shroud removal required)
24.Pulleys (crank, generator, fan)Replacement
25. Timing belt cover)Replacement (Cooling fan and fan shroud removal required)
26. Water hose
27. Oil pan, oil strainer, and oil pump
Replacement or inspection
Replacement or inspection
28. Piston and connecting rodReplacement or inspection (Cylinder head and oil pan
removal required)
Replacement or inspection
3-5

3-3. ENGINE REMOVAL
1) Disconnect negative (-) and positive (+)
cords from battery terminals.
‘)From starter motor terminals, disconnect
black/yellow lead wire and positive (+)
battery cord.
Disconnect coupler and white lead wire
from alternator terminals.
Disconnect lead wires from water tempera-
ture gauge and thermal switch. The gauge
and switch are on intake manifold.
Disconnect earth lead wire from intake
manifold.
5) Disconnect couplers of carburetor fuel cut
solenoid valve, vent solenoid valve and
mixture control solenoid valve, and dis-
connect couplers from TWSVS and VSV.
6) Remove warm air hose.
) Disconnect breather hose from air cleaner
case.
,) Remove air intake case from carburetor
body and air inlet hose.
1) Disconnect accelerator cable from carbure-
tor.
10) Disconnect vacuum hoses of TCAC and
canister from intake manifold.
11) Remove fuel tank filler cap to release fuel
vapor pressure in fuel tank. After releasing,
reinstall it. Disconnect fuel feed and return
hoses from fuel pump.
12) Disconnect lead wire from oil pressure unit
terminal and oxygen sensor lead wire at the
coupler.
13) Disconnect lead wires of back-up light
switch and fifth switch at their couplers.
14) Disconnect distributor lead wire at the
coupler.
15) Pull off high-tension cord from ignition coil.
16) Loosen radiator drain plug to drain cooling
water,
17) Disconnect water hoses from thermostat
cap and water inlet pipe. After removing
cooling fan & clutch and fan shroud, remove
radiator.
Fig. 3-3- 1
Fig. 3-3-2
16) Disconnect heater hoses from heater unit
outlet pipe and intake manifold.
Fig. 3-3-3
3)
4)
3-6

Engine Coolant
This subject is covered in SECTION 6 ENGINE
COOLING SYSTEM.
Exhaust Line and Muffler
Inspect each exhaust line connection for tight-
ness, and examine muffler and other parts for
evidence of breakage and leakage of gases.
Repair or replace defective parts, if any.
Compression Pressure Measurement
Check compression pressure on all four cylinders
as follows:
1) Warm up engine.
2) Stop engine after warming up.
3) Remove all spark plugs and disconnect
high tension cord from ignition coil.
4) Install compression gauge (special tool) into
spark plug hole.
5) Disengage clutch (to lighten starting load on
engine), and depress accelerator pedal all
the way to make throttle full-open.
6) Crank engine with fully charged battery, and
read the highest pressure on compression
gauge.
Standard
Limit
Max. difference
between any two
cylinders
Compression pressure
14.0 kg/cm2 (199.0 psi)
400 r/min
12.0 kg/cm2 (170.0 psi)
400 r/min
1 .O kg/cm2 (14.2 psi),
400 r/min
3
7) Carry out steps 4) through 6) on each cylin-
der to obtain four readings.
NOTE:
Compression pressure value is measured by using
compression gauge (Special tool 09915-64510).
Oil Pump Discharge Pressure Measurement
NOTE:
Prior to checking oil pressure, check the follow-
ing.
l Oil level in oil pan.
If level is low, add oil up to Full level hole on
oil level gauge.
0 Oil quality.
If oil is discolored, or deteriorated, change oil.
For particular oil to be used, refer to table on
p l-8 of SECTION 1.
l Oil leak.
If leak is found, repair it
1. Compression gauge (Special tool 09915-64510)
Fig. 3-8-7 Installing compression gauge
3-55

1) Disconnect lead wire from oil pressure
switch.
2) Remove oil pressure switch from cylinder
block.
6) After checking oil pressure, stop engine and
remove oil pressure gauge.
7) Before reinstalling oil pressure switch, be
sure to wrap its screw threads with sealing
tape and tighten switch to specified torque.
NOTE:
l If sealing tape edge is bulged out from screw
threads of switch, cut off edge.
8) After installing oil pressure switch, start
engine and check switch for oil leakage.
Fig. 3-8-8 Oil pressure switch
3) Install oil pressure gauge (special tool)
to vacated threaded hole.
Vacuum Measurement
Engine vacuum that develops in intake line is a
good indicator of engine condition. Vacuum
checking procedure is as follows:
1.Oil pressure gauge k+ecial tool O!Xil5-77310)
Fig. 3-8-9 Oil pressure gauge installation
4)Start engine and warm it up to normal
operating temperature.
5) After warming up, raise engine speed to
3,000 r/min and measure oil pressure.
Oil pressure
specification
3.0-4.2 kg/cm2
42.7 59.7 psi-
at 3,000
1) Warm up engine to normal operating tempe-
rature.
2) Install vacuum gauge @ (09915-67310), as
shown in Fig. 3-8-10. Install engine tacho-
meter.
Fig. 3-8- 10
3-56

,Fuel Pump
[ Rem’oval]
1) Disconnect negative cable from battery.
2) Remove fuel filler cap from fuel filler neck to
release fuel vapor pressure in fuel tank. After
releasing, reinstall the cap.
3) Disconnect fuel inlet, outlet and return hoses
from fuel pump.
Fuel Filter
[Removal]
1) Disconnect negative cable from battery.
2) Remove fuel filler cap to release fuel vapor
pressure in fuel tank. After releasing, reinstall
the cap.
3) Disconnect inlet and outlet hoses from fuel
filter.
4) Remove fuel filter with clamp.
[Installation]
1) Install filter and clamp, and connect inlet
and outlet hoses to fuel filter.
NOTE:.
The top connection is for outlet hose, the
lower one for inlet hose.
1. Fuel pump
2. Inlet hose3. Outlet hose
4. Return hose
Fig. 4-2-l 1
4) Remove fuel pump from cylinder head.
5) Remove fuel pump rod from cylinder head.
2
1. Fuel pump rod
2. Cylinder head
[Installation]
Reverse removal procedure for installation
using care for the following.
l After oiling it,install fuel pump rod to
cylinder head.
0 Use new fuel pump gasket.
l Make sure for proper hose connection.
0 Upon completion of installation, start engine
and check fuel hose or its joints for leaks.
1.Fuel filter3.From fueltank
2.To fuel pump4.Clamp
Fig.4-2-13
2) Connect negative cable to battery.
3) After installation, start engine and check it
for leaks.
Fuel Tank
[Removal]
1) Disconnect negative cable from battery.
2) Disconnect fuel level gauge lead wire.
3) To release the pressure in fuel tank, remove
fuel filler cap and then, reinstall it.
4) Raise car on hoist.
5) Drain fuel by removing drain plug.
6) Remove filler hose protector.
7) Disconnect filler hose from fuel tank.
.8) Disconnect fuel hosesand pipe from fuel tank.
9) Remove fuel tank.
4-34

Radiator Cap
A pressure-vent cap is used on the radiator. The
cap contains a pressure valve and vacuum valve.
The pressure valve is held against its seat by a
spring of pre-determined strength which protects
the cooling system by relieving the pressure if
the pressure in cooling system rises by 0.9
kg/cm2 (12.8 psi, 90 kPa). The vacuum valve is
held against its seat by a light spring which
permits opening of the valve to relieve vacuum
created in the system when it cools off and
which otherwise might cause the radiator to
collapse.
The cap has its face marked 0.9, which means
that its pressure valve opens at 0.9 kg/cm2
(12.8 psi, 90 kPa).
NOTE:
Do not remove radiator cap to check engine
coolant level; check coolant visually the see-
through water reservoir tank.
Coolant should be added only to reservoir tank
as necessary.
4
WARNING:
As long as there is pressure in the cooling
system, the temperature can be considerab-
ly higher than the boiling temperature of
the solution in the radiator without causing
the solution to boil. Removal of the
radiator cap whileengine is hot and pressure
is high will cause the solution to boil
instantaneously and possibly with explosive
force, spewing the solution over engine,
fenders and person removing cap. If the
solution contains flammable anti-freeze
such as alcohol (not recommended for use
at any time), there is also the possibility of
causing a serious fire.
2’
I6
. Pressure valve
Vacuum valve
3. To water reservoir tank4. Pressure relief5. Vacuum relief
6. From water reservoir tank
Fig. 6-2
Water Reservoir Tank
A “see-through” plastic reservoir tank is connect-
ed to the radiator by a hose. As the car is
driven, the coolant is heated and expands. The
portion of the coolant displaced by this ex-
pansion flows from the radiator into the reservoir
tank.
When the car is stopped and the coolant cools
and contracts, the displaced coolant is drawn
back into the radiator by vacuum.
Thus, the radiator is kept filled with coolant to
the desired level at all times, resulting in increas-
ed cooling efficiency.
Coolant level should be between “FULL” and
“LOW’ marks on the reservoir tank.
Coolant should be added only to the reservoir
tank as necessary.
Fig. 6-3 Water reservoir tank
6-3

Coolant
The coolant recovery system is standard. The
coolant in the radiator expands with heat, and
the overflow is collected in the reservoir tank.
When the system cools down, the coolant is
drawn back into the radiator.
The cooling system has been filled at the factory
with a quality coolant that is either 50/50
mixture of water and GOLDEN CRUISER
1200 or 30/70 mixture of water and GOLDEN
CRUISER 1200.
The 50/50 mixture coolant solution provides
freezing protection to -36°C (-33”F), the
30/70 mixture coolant solution provides freezing.
protection to -16°C (3” F).
GOLDEN CRUISER 1200 - “Anti-freeze and
Summer Coolant” - its effects
1) Its freezing temperature is much lower and
depends on the concentration of GOLDEN
CRUISER 1200. It is an anti-freeze coolant.
2) It does not corrode the metal surfaces of the
cooling circuit.It is an anti-corrosion
coolant.
3) It does not develop foam or bubbles. It is a
foam-inhibited coolant.
When changing the engine coolant, use mixture
of 50% water and 50% GOLDEN CRUISER
1200 for the market where ambient tempera-
ture falls lower than -16°C (3°F) in winter and
mixture of 70% water and 30% GOLDEN
CRUISER 1200 for the market where am-
bient temperature doesn’t fall lower than -16°C
(3” F).
ANTI-FREEZE PROPORTIONING CHART
Freezing
Temperature
GOLDEN
CRUISERConcentration
OC-16-36
OF3-33
%3050
Ratio of corn-Itr.1.4413.362.4012.40
pound tous pt.3.04l7.10 5.0715.07cooling waterImp. pt.2.5315.914.221422
Reservoir tank0.6 liters
(1.3/1.1 US/Imp pt.)I
Total4.8 liters
(10.1/8.4 US/Imp pt.)
NOTE:
l Alcohol or methanol base coolants or plain
water alone should not be used in cooling
system at any time, as damage to cooling
system could occur.
l Even in a market where no freezing tempe-
rature is anticipated, mixture of 70% water
and 30% GOLDEN CRUISER 1200
should be used for the purpose of corrosion
protection and lubrication.
Coolant Level
,To check level, lift hood and look at “see
through” water reservoir tank.
It is not necessary to remove radiator cap to
check coolant level.
WARNING:
To help avoid danger of being burned:
l do not remove reservoir tank cap while
coolant is “boiling”, and
l do not remove radiator cap while engine
and radiator are still hot
Scalding fluid and steam can be blown out
under pressure if either cap is taken off too
soon.
When engine is cool, check coolant level in reser-
voir tank. A normal coolant level should be
between “FULL” and “LOW’ marks on reser-
voir tank.
If coolant level is below “LOW” mark, remove
reservoir tank cap and add proper coolant to
tank to bring coolant level up to “FULL” mark.
Then, reinstall cap aligning the arrow marks on
the tank and cap.
NOTE:
If proper quality antifreeze is used, there is no
need to add extra inhibitors or additives that
claim to improve system. They may be harmful
to proper operation of system, and are unneces-
sary expense.
6-11

11-l. GENERAL DESCRIPTIONThe clutch is a diaphragm-spring clutch of a dry single disc type. The diaphragm spring is of a tapering-
finger type, which is a solid ring in the outer diameter part, with a series of tapering fingers pointing
inward. The disc, carrying four torsional coil springs, is slidably mounted on the transmission input shaft
with a serration fit.
The clutch cover is secured to the flywheel, and carries the diaphragm spring in such a way that the
peripheral edge of the spring pushes on the pressure plate against the flywheel (with the disc in between),
when the clutch release bearing is held back: Tnis is the engaged condition of the clutch.
Depressing the clutch pedal causes the release bearing to advance and push on the tips of the tapering
fingers of the diaphragm spring. When this happens, the diaphragm spring pulls the pressure plate away
from the flywheel, thereby interrupting the flow of drive from flywheel through clutch disc to trans-
mission input shaft.
Flywheel
Crankshaft
Clutch disc.
Transmission
Fig. 11-l
11-2