Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 147

6-1-6 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 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 regu-
lator) 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 fit-
ting 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.
• Fuel or fuel vapor hose connection varies with each type of
pipe.
When reconnecting fuel or fuel vapor hose, be sure to con-
nect and clamp each hose correctly referring to figure.
After connecting, make sure that the hose has no twist or
kink.
• When installing fuel pipe union bolt gasket, always use new
gasket and tighten union bolt to specified torque.
• When installing injector, fuel feed pipe or fuel pressure regu-
lator, lubricate its O-ring with gasoline.
[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.)