Fuel filter

Fuel filter (small cylinder in white) for a tractor engine

Fuel filter (in white) in a 1982 GMC Sierra

Fuel filter for diesel Volkswagen car engines

A fuel filter is a filter used to screens out foreign particles or liquids from the fuel. Most internal combustion engines use a fuel filter, in order to protect the components in the fuel system.

## Contents

* 1 Filters for foreign particles
* 2 Filters for foreign liquids
* 3 See also
* 4 References

## Filters for foreign particles

Unfiltered fuel may contain several kinds of contamination, for example paint chips and dirt that has entered the fuel tank while filling, or rust caused by moisture in a steel tank.[citation needed] If these substances are not removed before the fuel enters the system, they will cause rapid wear and failure of the fuel pump and injectors.[1]

The filters are normally made into cartridges containing a filter paper.[citation needed] Fuel filters need to be maintained or replaced at regular intervals.

## Filters for foreign liquids

Some diesel engines use a bowl-like design to collect water in the bottom of the filter (as diesel floats on top of water).[citation needed] The water can then be drained off by opening a valve in the bottom of the bowl and letting it run out, until only the fuel remains.

## See also

* Fuel pump
* Fuel tank
* List of auto parts

## References

1. ↑ "How long do fuel injectors last?" (in en-us). 14 July 2010. https://auto.howstuffworks.com/under-the-hood/car-part-longevity/fuel-injectors-last.htm.

* v
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Internal combustion engine

Part of the Automobile series

Engine block &
rotating assembly|

* Balance shaft
* Block heater
* Bore
* Connecting rod
* Crankcase
* Crankcase ventilation system (PCV valve)
* Crankpin
* Crankshaft
* Core plug (freeze plug)
* Cylinder (bank, layout)
* Displacement
* Flywheel
* Firing order
* Stroke
* Main bearing
* Piston
* Piston ring
* Starter ring gear

Valvetrain &
Cylinder head|

* Overhead valve ("pushrod") layout
* Overhead camshaft layout

* Cam follower / Tappet
* Camshaft
* Combustion chamber
* Compression ratio
* Head gasket
* Rocker arm
* Timing belt
* Timing chain
* Valve

Forced induction|

* Blowoff valve
* Boost controller
* Intercooler
* Supercharger
* Turbocharger

Fuel system|

* Diesel engine
* Petrol engine

* Carburetor
* Fuel filter
* Fuel injection
* Fuel pump
* Fuel tank

Ignition|

* Magneto
* Coil-on-plug ignition
* Distributor
* Glow plug
* High tension leads (spark plug wires)
* Ignition coil
* Spark-ignition engine
* Spark plug

Engine management

* Engine control unit (ECU)

Electrical system

* Alternator
* Battery
* Dynamo
* Starter motor

Intake system|

* Airbox
* Air filter
* Idle air control actuator
* Inlet manifold
* MAP sensor
* MAF sensor
* Throttle
* Throttle position sensor

Exhaust system|

* Catalytic converter
* Diesel particulate filter
* Exhaust manifold
* Muffler
* Oxygen sensor

Cooling system|

* Air cooling
* Water cooling

* Electric fan
* Radiator
* Thermostat
* Viscous fan (fan clutch)

Lubrication|

* Oil
* Oil filter
* Oil pump
* Sump (Wet sump, Dry sump)

Other|

* Knocking / pinging
* Power band
* Redline
* Stratified charge
* Top dead centre

* Portal
* Category

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