Palmo

Thanks for this info, I do go on bmwland also, although I've never really been an active member on there. I will look this up on there - again many thanks!

Palmo

Still not sure I understand why it needs to 'over-fuel' - more fuel than can be burnt will simply be expelled through the exhaust as black smoke - so what's the benefit here? I'm not saying there isn't one, rather that I don't know of one. I'm not an expert, but have a reasonable level of technical knowledge.

Scoobies are mapped from the factory in general to 'over-fuel' - this I was reliably informed by one of the leading UK mappers is to help cool the engine amongst other things and is one of the reasons they are so poor - even in standard form - on fuel. Cylinder 3 overheating is very common and is indeed in part due to the location of the turbo, but also because that cylinder is the furthest away to be supplied in line with fuel. This is a relatively common problem on Scoobies when being driven hard, especially on track days!
Whilst not upgraded to your spec, I too had a pretty sorted Scooby in the past. Whilst an awsome car, with buckets of character, loads of fun and like rockets, they are fundamentally a flawed design in essence. I loved mine immensley and still to this day mis the car!

Anzafin

Back to topic.

I removed the swirl flaps too and made a DIY for anyone who's interested to do the same.
Here: Removing the swirl flaps in a diesel engine

Dr Dave

the diesel medal of honour goes to.........................Anzafin................ .................

Anzafin

Umhh... thanks
But so many people have already done this and I just followed...

Bob525D

Hi Jambers,

Do you mean that my 2004 525D doesnt have these annoying engine killers after all ? If so then thats a job i can score off the list for the summer .

Thanks,

Bob

Anzafin

That's some great news if this is the case, but I'm not completely buying it, yet...
I would check the underside of the intake manifold if I could find that metal rod moving the flaps.

Jambers

Actually - I think it might having checked REALOEM - you need to check it out:

http://www.realoem.com/bmw/showparts.do?mo...hg=11&fg=40

I am sure I read somewhere that no 525d's did have the swirls, but may be wrong!!!!!!

The 525d LCI M57N2 (i.e. the 3.0l) doesn't appear to have them according to REALOEM:

http://www.realoem.com/bmw/showparts.do?mo...hg=11&fg=40

paulmc

Slightly off topic

Palmo, You are 100% correct in what you are saying

Dave is not quite so right

My car is running over 340bhp and 700nm and not even a wee bit of smoke. Cars with DPF should NEVER smoke unless the DPF is knackered with over fueling :thumbsdown: Yes non DPF cars can smoke on initial throttle until the turbo spins up. If they smoke for more than that they are not set up right.

Smoke is unburned fuel. unburned fuel does not make power

Palmo

I can't comment on the pre-LCI 525d - I haven't looked this up, but can say my LCI 525d definitely does nothave the flaps - Real OEM confirms this! This is a real bonus to me! I've also read else where that none of the 'lower powered' variants of an engine have them, e.g 118d / 318d does not have them whilst the higher output versions (120d / 320d) does have them. Whilst I'm certainly not complaining I don't understand why they are not needed on the lower output engines.