Priming a fuel filter after changing it
Discussion
mercedeslimos said:
You need to bleed from the tank return if you can figure that one out
From the return to the tank? I'm having total confusion - I'd googled it and seem to get different views, some people say bleed the return, some the inlet?? I can't work out if people are just using different terms for the same hose! I basically want to just make sure the filter is full of fuel. StillLearning said:
From the return to the tank? I'm having total confusion - I'd googled it and seem to get different views, some people say bleed the return, some the inlet?? I can't work out if people are just using different terms for the same hose! I basically want to just make sure the filter is full of fuel.
In real terms the fuel system goes:Tank > Filter> Pump > Filter > Tank
You want it at the fourth arrow in that flowchart, after the second filtration, and before it goes back to the tank. That way you stand a chance of getting all the air out, or as much as the high-pressure pump will be able to get the engine started without air locking.
It's a common rail diesel, no matter what engine the theory is the same. You're lucky it's not a Ford 1.8 TDCi, those seem to be absolute pigs and need every last drop of air gone.
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