Thread: Potentially silly questions about HPFP replacement that I haven't managed to find..

..answers to.

I've taken everyones kind feedback on board and am at peace with the fact I'll have to do the HPFP at some point in the not to distant future, so I'm preparing.

As a result, I'm going to ask as many dumb questions as I can fit into a single post in the hope of coming up to speed quickly and sponging off those with experience. As an aside, if you are in Perth, have this experience, like to chat and are so inclined, I'm more than willing to travel to you on a nominated Friday afternoon with some cold ones in exchange for your wisdom (or Single Malt, but that might require a Taxi).

It's an EU4 TDV6. The manual indicates a number of items are single use only :
- The 4 bolts holding the pump to the bracket (2 hex, 2 torx)
- The two fuel pipes from the pump to the rails (LR004714/5)
- The Belt and Idler

Costwise this is arbitrary really, as the pump is the single biggest expense but do I really need to replace the pipes? What about them makes them single use?
The Belt and idler are probably 20,000K old at this point, so I figure I might as well do it while I'm there, but again single use? I thought they were rated for 160,000km.

Actually likewise, the pipes from the rails to the injectors are also indicated as "replace on removal". Are they really? If I pull an injector does it need a new pipe when it goes back?

The manual calls to cap off all the lines/ports as they are disconnected (as you would). Are there any tricks or readily available caps? For other stuff I tend to use tiny little plastic baggies and rubber bands (or PVC tape around the bags) to keep things clean, but the high pressure side of the fuel system seems orders of magnitude more sensitive.

Before I do this, one of the tests I want to do is an injector spill test. I've seen pre-fabricated "spill test kits" bandied about, but I can't find a source for one. Is this the sort of thing one can just cobble up with the right sized tube or do you need the right fitting end on the pipes?

Checking LRDirect I see they have 2 HP Pumps. One is a Siemens and the other a VDO. The VDO is considerably cheaper (like 2/3rds the price). Siemens owned VDO (until recently anyway). Is there really a brand preference for the pumps if you are buying new? Is there some sort of "save now but pay later" I'm likely to encounter with a VDO pump?

That's about my list for now. Most others I've managed to find answers for either here or on the UK Disco3 forum, but haven't seen these covered elsewhere.

Rofl. I think that some days given mine’s insured value lol