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Modifications apportées à l’Mercedes W123 Diesel Fuel Filter, Secondary Replacementintroduction

Modifié par Nicolas Siemsen

Modification approuvée par Nicolas Siemsen

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Appareil
Mercedes W123
Type
replacement
Thing
Diesel Secondary Filter
Title
Mercedes W123 Diesel Secondary Filter Replacement
Introduction
The secondary, larger, spin-on fuel filter on the W123 diesel engines does the heavy lifting when it comes to filtering. It keeps small particles in the fuel from damaging the injection pump and the injector nozzles.
It does a good job of this, but over time it can be come clogged. Eventually, fuel flow will be limited to the point where it affects power output. Change it before that happens. Consider changing it at least every other year, depending on how much you drive. And definitely replace it after you perform a diesel purge.
Time Required Min
15 minutes
Time Required Max
15 minutes
Difficulty
Easy
Conclusion
After finishing, run the engine to ensure it was properly primed. If it doesn't start after 30 seconds of cranking, stop and prime some more.
Author
Public
Non
Summary
While the primary filter before the lift pump is responsible for catching large particles in the fuel, the secondary filter keeps the fuel clean enough to pass safely through the injection pump and injector.

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