Any fuel leak, however small, can cause a
fire. Do not drive a car with a suspected leak until you have cured it. Never
leave a car dripping petrol where a passer-by may throw a cigarette end under
it. A small fire extinguisher, fitted where you can get at it quickly, is a
valuable accessory.ndk oil seals
choice materials。
Whenever you check fuel pipes, disconnect the battery to prevent stray sparks igniting petrol or petrol vapour. Above all, put out all naked lights and cigarettes. Use a torch rather than an inspection lamp, which could start a fire if the bulb is accidentally broken.
The fuel pipe of a car with the engine in front and the fuel tank at the rear generally runs under the floor, where it can be exposed to corrosion and knocks.
For most of its length it is usually made of metal, but different materials are used on different sections and these are linked with various kinds of connectors. Sometimes the whole pipe is plastic.mechanical seal
Sometimes there is a twin piping system, with supply and return pipes. The fuel pump circulates petrol in an endless loop, from the tank and back again, from which the carburettor draws off as much as it needs.ndk oil seals choice materials。
A normal, single fuel pipe begins at the outlet on top or at the side of the tank, where it is usually combined with the electric fuel-tank sender unit which operates the fuel gauge.
There is a short pick-up pipe with a filter reaching into the bottom of the tank.
From the outlet the pipe runs to the fuel pump – either a mechanical one mounted on the engine, or an electric one which is often sited at the rear next to the tank, or submerged in it.
The pump sends the fuel to the carburettor, but there are one or more filters on the way – often in unsuspected places that are difficult to reach.
The last part of the fuel pipe, inside the engine compartment, has to be flexible to allow for the engine moving on its rubber mountings.
The flexible section of the piping is usually made of reinforced rubber hose, but sometimes clear, flexible plastic tube is used.
The most usual type of connector for metal fuel pipes on modern cars is a short length of rubber hose fitting over the pipe ends and secured by two hose clips.
Sometimes there are no clips, and the connector is a push-on fit.dust seal
On some earlier cars rigid joints are used on metal piping, especially where it is attached to the tank outlet.
*A typical fusion system* A single fuel pipe runs from the tank, under the floor of the car to a mechanical pump on the engine. The pump delivers fuel to the carburettor. *Twin fuel-pipe system* Twin fuel pipes are checked for leaks in the same way as single ones.ndk oil seals choice materials。
A typical fusion system
A single fuel pipe runs from the tank, under the floor of the car to a mechanical pump on the engine. The pump delivers fuel to the carburettor.
Twin fuel-pipe system
Twin fuel pipes are checked for leaks in the same way as single ones.viton seal
A tube nut fits over the pipe and is screwed tight to force the pipe against an ‘olive’ – a piece of soft metal shaped like a hollow bead.
The ends of the olive are squashed to make a fuel-tight joint.
Sometimes there is no olive, and the tube nut forces the ends of the tube on to a tapered seating which spreads out the end of the tube into a bell shape.
Leaks can be caused by corrosion in steel pipes, and cracks and abrasion in all types.ndk oil seals choice materials。
The clips holding the pipe to the chassis may damage it, or they may rust and fall off so that the pipe becomes loose. It .may then get dangerously close to the exhaust pipe.
The pipe may also be damaged by stones on unmade roads, or even by jacking the car up with the jack in the wrong place.
Apart from damage to the pipe itself, joints may come loose and leak.
Rubber joints may fray, or the clips loosen. Metal joints tend to leak when they have been pulled or pushed, so that the olive or expanded pipe end is distorted and no longer forms an effective seal with its connector.
Inspect them all carefully at regular service intervals.ndk oil seals choice materials
Whenever you check fuel pipes, disconnect the battery to prevent stray sparks igniting petrol or petrol vapour. Above all, put out all naked lights and cigarettes. Use a torch rather than an inspection lamp, which could start a fire if the bulb is accidentally broken.
The fuel pipe of a car with the engine in front and the fuel tank at the rear generally runs under the floor, where it can be exposed to corrosion and knocks.
For most of its length it is usually made of metal, but different materials are used on different sections and these are linked with various kinds of connectors. Sometimes the whole pipe is plastic.mechanical seal
Sometimes there is a twin piping system, with supply and return pipes. The fuel pump circulates petrol in an endless loop, from the tank and back again, from which the carburettor draws off as much as it needs.ndk oil seals choice materials。
A normal, single fuel pipe begins at the outlet on top or at the side of the tank, where it is usually combined with the electric fuel-tank sender unit which operates the fuel gauge.
There is a short pick-up pipe with a filter reaching into the bottom of the tank.
From the outlet the pipe runs to the fuel pump – either a mechanical one mounted on the engine, or an electric one which is often sited at the rear next to the tank, or submerged in it.
The pump sends the fuel to the carburettor, but there are one or more filters on the way – often in unsuspected places that are difficult to reach.
The last part of the fuel pipe, inside the engine compartment, has to be flexible to allow for the engine moving on its rubber mountings.
The flexible section of the piping is usually made of reinforced rubber hose, but sometimes clear, flexible plastic tube is used.
The most usual type of connector for metal fuel pipes on modern cars is a short length of rubber hose fitting over the pipe ends and secured by two hose clips.
Sometimes there are no clips, and the connector is a push-on fit.dust seal
On some earlier cars rigid joints are used on metal piping, especially where it is attached to the tank outlet.
*A typical fusion system* A single fuel pipe runs from the tank, under the floor of the car to a mechanical pump on the engine. The pump delivers fuel to the carburettor. *Twin fuel-pipe system* Twin fuel pipes are checked for leaks in the same way as single ones.ndk oil seals choice materials。
A typical fusion system
A single fuel pipe runs from the tank, under the floor of the car to a mechanical pump on the engine. The pump delivers fuel to the carburettor.
Twin fuel-pipe system
Twin fuel pipes are checked for leaks in the same way as single ones.viton seal
A tube nut fits over the pipe and is screwed tight to force the pipe against an ‘olive’ – a piece of soft metal shaped like a hollow bead.
The ends of the olive are squashed to make a fuel-tight joint.
Sometimes there is no olive, and the tube nut forces the ends of the tube on to a tapered seating which spreads out the end of the tube into a bell shape.
Leaks can be caused by corrosion in steel pipes, and cracks and abrasion in all types.ndk oil seals choice materials。
The clips holding the pipe to the chassis may damage it, or they may rust and fall off so that the pipe becomes loose. It .may then get dangerously close to the exhaust pipe.
The pipe may also be damaged by stones on unmade roads, or even by jacking the car up with the jack in the wrong place.
Apart from damage to the pipe itself, joints may come loose and leak.
Rubber joints may fray, or the clips loosen. Metal joints tend to leak when they have been pulled or pushed, so that the olive or expanded pipe end is distorted and no longer forms an effective seal with its connector.
Inspect them all carefully at regular service intervals.ndk oil seals choice materials
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