Common rail injectors

[n0v0s]

Sounds like the nozzles are absolutely f*cked... Though the diesel in the sump is a worry, unless you had a severely dribble injector you'd struggle to get that...

My biggest worry would be getting the injectors out the head, they're renound to be a complete Bastard on the m57s..

Have you got a map ready for the 535d nozzles, since it'll just smoke continually otherwise, since the ecu has no idea that its got some chronic nozzles in...

The engine was warm/hot so oil had obviously thinned down, there was no smell of diesel in the oil though. However, i shall go check now with a cold engine. I doubt there is diesel getting in, more of a worse case scenario - which would more likely lead to a leaky high pressure pump, dripping derv into the sump. Engines nice and quiet though, however it must be chronically overfuelling as it is smoking when revd hard - ecu probably over compensating. The throttle is extremely sensitive too, slight prod and it revs up quuuick!

Getting the injectors off the head could be a nightmare, will probably have to buy a puller. Make life easier. I don't have a map ready, need to find somebody willing to email me a map with adjustments and power to my spec. The popular e-maps dude will only map to his 260bhp xxxlbft usual spec. Any recommendations?

If i was to have the car properly mapped to accept the 535d injectors, would fuel economy be noticeably worse than it would be on original 330d injectors + map? I'm thinking that it should be the same, assuming driving similiarly due to the injection duration/quantities being balanced out by ecu to meet requirements..

i.e. although 535d injectors nozzles flow more per injection... But they could have their inj duration reduced and timing advanced in which to inject the fuel compared to 330d injectors .. ultimately putting in the same mm3 of fuel per stroke at X demand hence resulting in possible greater efficiency/ increased mpg over 330d if driving like miss daisey? If found someone to rebuild my injectors, just need to ascertain if 535d injectors will kill my economy or not over original injectors if driving with mpg in mind when mapped. Costs are quite similiar to refurb!

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I understand it's knackered solenoid needles in the injector body that cause excessive leak-off, not the nozzles. Are you saying that there is actually diesel in the sump now, or that you think there might be? Don't quite understand that sentence... Have you done a leak-off test on them, or is that another assumption?

Ahh i see, so would that require a complete new injector body or is that solenoid needle assembly able to be replaced/refurbed? Why do they cause excessive leak off? Wear? or is it because they get jammed? Basically, what does it amount too... a simple diy opening of injectors and freeing/cleaning the solenoid? OR new complete injectors/or solenoid assembly? As above, will go check the oil now whilst it is cold. Leak off test to be performed shortly, but if i can't find the correct pipes, i might just do a quick injection on only leak off, see if they can hold. Any which dribble are most definitely fked! Not definitive, but quick and easy!

I'm yet to fully learn about crd injector operation, big step up from idi dervs! Cheers for both of your input lads! Great knowledge. If i can just find a SMF and clutch assembly to suite i would like to go quiet stupidly north of 300bhp and 600lbft. Don't mind poping a few 2260vs, suppose i could get used to welding the rear subframe too lol