Diesel - Fuel system Tips and Tricks

HarryMann: Air in fuel supply and post disassembly bleeding tips

If you roam the scrapyards and come across any Peugeot diesels, you'll find they nearly all have a rubber priming-bulb in the main fuel line to the inj.pump. Just cut it off outboard of all the clipped joints, leaving as much pipe and bits and bobs as possible for later use....

These are connected with nice little stainless pipe clips (removable and refittable with pliers, [i]very clever clips[/i])

Using suitable hose sizes, this can be fitted in your main fuel-line from the filter... and assist in these situations, forcing fuel up through the pump and out the by-pass, helping to clear any air.

I think it is the injectors that are meant to be self-bleeding and not always the pump.

NB. Andy Simpson has pointed out that on these installations it's the by-pass return joint on the top of these filters that is usually the culprit if air continually gets into main fuel-feed line to the pump. I believe he calls it the $%£^&^ fuel-filter from hell!