Precaution On Fuel System Service - Suzuki GRAND VITARA XL-7 Owner's Manual

6-1-4 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)

Precaution on Fuel System Service

• Work must be done with no smoking, in a well-ventilated area and away from any open flames.
• As fuel feed line (between fuel pump and fuel pressure regulator) is still under high fuel pressure even after
engine was stopped, loosening or disconnecting fuel feed line directly may cause dangerous spout of fuel to
occur where loosened or disconnected. Before loosening or disconnecting fuel feed line, make sure to
release fuel pressure according to "FUEL PRESSURE RELIEF PROCEDURE" in this section.
A small amount of fuel may be released after the fuel line is disconnected.
In order to reduce the chance of personal injury, cover the fitting to be disconnected with a shop cloth. Put
that cloth in an approved container when disconnection is completed.
• Never run engine with fuel pump relay disconnected when engine and exhaust system are hot.
• When disconnecting couplers, don't pull wire harness but
make sure to hold coupler itself. With lock type coupler, be
sure to unlock before disconnection. Attempt to disconnect
coupler without unlocking may result in damage to coupler.
When connecting lock type coupler, insert it till clicking
sound is heard and connect it securely.
• Fuel or fuel vapor hose connection varies with each type of
pipe. When reconnecting fuel or fuel vapor hose, be sure to
connect and clamp each hose correctly referring to left fig-
ure.
After connecting, make sure that the hose has no twist or
kink.
[A] : With short pipe, fit hose as far as it reaches pipe joint as shown.
[B] : With following type pipe, fit hose as far as its peripheral projection as shown.
[C] : With bent pipe, fit hose as far as its bent part as shown or till pipe is about 20
to 30 mm (0.79 – 1.18 in.) into the hose.
[D] : With straight pipe, fit hose till pipe is about 20 to 30 mm (0.79 – 1.18 in.) into
the hose.
1. Hose
2. Pipe
3. Clamp
"a" : Clamp securely at a position 3 to 7 mm (0.12 – 0.27 in.) from hose end.
"b" : 20 to 30 mm (0.79 – 1.18 in.)
• When installing fuel union bolt gasket, always use new gas-
ket and tighten union bolt to specified torque according to
"TIGHTENING TORQUE SPECIFICATION" in Section 6C.
• When installing injector, fuel feed pipe or fuel pressure regu-
lator, lubricate its O-ring with gasoline.
• When connecting fuel pipe flare nut, first tighten flare nut by
hand and then tighten it to specified torque.