Priming a 300Tdi

the bolts I can see are tight. I only loosed the bleed and one banjo bolt. The fact that I can't manually prime it, suggests to me that the prime/lift pump might be gone. After I turned her off and had another go at hand priming, I could see a few tiny bubbles intermittently, but nothing more. I would have expected fuel to flow out of the bleed hole, but this didn't happen. I can't really bleed the injector pump either at this rate, which may also have air in it.

I'll triple check it all though.

Thanks.

Joshua.

Try not to pre-fill the filter with diesel, you stand a good chance of introducing crap into the pump, and this coming from a bloke that always pre-fills oil filters ;)

Mmm Tdi's are self priming engines so you don't need to prime them

So sounds like you have another problem. As said check linkage
Or in the change over you have disturbed something.
I have change loads of fuel filters on the TDi's and never had a problem.

your lift pumps gone and your engine is operating on the regulator pump integral to the injector pump.

The regulator pump works fine while its fully primed, once you loose prime or begin to draw air the lift pump is vital to keeping the engine running. the most common sign of drawing air through the fuel system is the injector pump rattling.

Quote:

---

Originally Posted by Blknight.aus

your lift pumps gone and your engine is operating on the regulator pump integral to the injector pump.

---

That's what I reckon too, now! I removed the lift pump and manually actuating the arm does nothing I can see. I put some soapy water on the inlet and outlet orifices of the pump when moving both leavers, nothing happened - no sucking or blowing of bubbles. I put a hose on the inlet hanging in a jar of diesel - nothing, even after pooring it in manually first.

I inverted it and pumped the lever and it actually jammed. I gave it a shake and I could hear loose bits inside rattling. Me thinks it's cactus.

I know a couple posts had suggested it already, so Kudos to you. ;)

I have ordered a new one, so *hopefully* it will solve all my problems!! All going well, I'll have 18 hours to put it together before my 3-day fishing trip. No pressure, Joshua!

Bloody poor luck that it failed at the filter change - the small amount of air must have been the final straw... Considering I have only had the car for 500km, so far I have had a pretty average run! Ho-hum.

Thanks guys,

Joshua.

Well, just to follow up...

The new fuel lift pump is in and fitted. All problems are now solved. I had some issues getting the olives on the fuel pipes on the lift pump. They needed much coersion and in the end I could only get on flush with the pipes. They seem to be too tight and force was damaging the olives.

Anyway, it's not leaking diesel and i'm priming again! Yee-ha.

Thanks for all the help all.

Joshua.