Dismantling of fuel lines and fuel hoses
Cleanliness is the main commandment when working on the fuel system. It is necessary to pre-clean - especially in the petrol injection system - at least the area in which the work is carried out, so that dirt cannot enter the open pipelines.
To loosen the clamping clamps, you need to flatten the metal loop around the perimeter with tongs. As a result, the clamping collar expands.
Another possibility: widen the metal loop with a narrow screwdriver.
Remove the fuel hose by rotating it. If this is not possible, install an open-end wrench at the end of the hose and wring out the hose with it.
When mounting, you must use screw clamps instead of clamping clamps.
Screw clamps (hose clamps) can be reused. When tightening, do not apply too much force, otherwise the gearing will be destroyed and the screw clamp will become unusable.
Screwed pipe connections with hollow bolts must not be overtightened. Check and, if necessary, replace the O-rings.
Quick-release fasteners: they can also be loosened without special tools.
The photo shows the dismantled fuel level sensor in the fuel tank. The numbers indicate:
1 - float;
2 - variable resistance;
3 - connector;
4 - connecting rod.
Both arrows point to the so-called Quick Fittings (fast acting closures), which interconnect the fuel lines on the bottom of the car. In chapter «Dismantling of fuel lines and fuel hoses» in this chapter, read further on how to disconnect these closures without special tools.
Use two screwdrivers to press the fixing tabs in both recesses in the quick-release fastener.
Extend the quick release shutter at the same time.
During installation, press both ends of the pipelines against each other so that you can hear how they lock.
In our fuel-injected vehicles, please note that the fuel system remains under pressure for a long time after the engine has been switched off.
When unscrewing the fuel line, keep a rag ready so that fuel cannot splash into the eyes, or relieve fuel pressure by means of a test connector in vehicles with such a device, on the fuel distribution pipe (place a container under the draining fuel).
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