Precautions on Fuel System Service
Work must be done with no smoking, in a well-ventilated area and away from any open flames.
A small amount of fuel may be released after fuel line is disconnected.
In order to reduce the chance of personal injury, cover fitting to be disconnected with a shop cloth. Put that cloth in an approved container when disconnected is completed.
Never run engine with main 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 connect and clamp each hose correctly referring to the figure.
After connecting, make sure that it has no twist or kink.
[A]: With short pipe, fit hose as far as it reaches pipe joint as shown.
[B]: With the 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
4. Clamp securely at a position 3 – 7 mm (0.12 – 0.27 in.) from hose end.
5. 20 – 30 mm (0.79 – 1.18 in.)
Before starting any service on fuel system, refer to Fuel Delivery System Description:K9K .
When installing fuel filter union bolt or plug bolt, always use new gasket and tighten it to specified torque.
When installing injector, fuel feed pipe or fuel pressure regulator, lubricate its O-ring with spindle oil or fuel.
When connecting fuel pipe flare nut, first nut, first tighten flare nut by hand and then tighten it to specified torque, using back-up wrench.
The fuel system installed on the engine injects the high pressure fuel into the engine. Therefore, before starting fuel system service, confirm that fuel high pressure line is not under pressure referring to Fuel Pressure Relief Confirmation Procedure:K9K .
After performing any service on fuel system, refer to Fuel Leakage Check:K9K to see if there is any fuel leakage.