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’54 E46 320cd M-Sport (INLET MANIFOLD)

Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 3 Series
Forum Discription: This forum will deal with any issues on the BMW 3 Series (E21, E30, E36, E46, E90, E91 & E92)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=47917
Printed Date: 03-May-2024 at 11:06


Topic: ’54 E46 320cd M-Sport (INLET MANIFOLD)
Posted By: MJ'sBM
Subject: ’54 E46 320cd M-Sport (INLET MANIFOLD)
Date Posted: 17-June-2011 at 01:45

Hey All,

Sorry to bother you all, but I just got my '54 E46 320cd
M-Sport (123Kmls) serviced by (BMW Dealer) today.

I mentioned to the mechanic today when I was handing it
in that, I have been noticing that the car has been
lacking in/not producing full power in all gears from
about 2,000rpm as when you put the foot down & the rev
hit approx 2,000/2,250rpm & the revs/power stops/slows
down dramatically & it takes ages for the full
power/turbo to kick in (if it does at all) as you can
feel it holding back!

The only way I have noticed to help with this is when it
happens to release the accelerator fully & then to press
it fully again & this seems to work most of the time!?!?

So the mechanic told me he would run the diagnostics on
it & see what would show up & this is what he said. "the
diagnostics shows that it is the 'Inlet-Manifold & Glow-
Plugs' & I need to change them all especially the Inlet-
Manifold ASAP (Total cost of €1,000) before it damages
the engine. Is this possible???

Would removing the manifold & cleaning it just work??? or
is there any chance it could be these VERY FAMOUS "Swirl-
Flaps" that's causing this problem???

Also, I don't see how the 'Glow-Plugs' could cause this
as there has never been a problem starting the car, even
in very cold weather like this winter & the mpg is still
around 45/50mpg!

But if ye do think the Manifold at least needs to be
replaced! Does anyone know where I can buy 1 & have a BMW
Specialist in Ireland to replace it at a much better
price than I was quoted!?!?

All information/Guidance will be very much appreciated.

Thank you all very much in advance for your help in
relation to this.


Regards,
MJ



Replies:
Posted By: bmwcare
Date Posted: 17-June-2011 at 02:23
1. Remove 'Swirl Flaps' - you do not need to renew manifold. Some dealers are now doing this, if not, then a good Indy is what you want. This is urgent.
2. Glow plugs cause smooth running issue when cold NOT power issue (but should be done with #1 as manifold must be removed to fit)
3. Get it diagnosed properly for power issue - can be many things - but highly, highly unlikely that you were given correct diagnosis.

You were given a 'code read' - NOT a proper diagnostic!

Kind Regards,
E.



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Posted By: Andrew Rolland
Date Posted: 17-June-2011 at 08:20

http://www.swirlflaps.co.uk/ - Swirl flaps are the DIEsel achilies heel.

Get them http://www.motormec.co.uk/swirl.pdf - removed before they write off the engine.

Also try cleaning out the inlet manifold.  Have a read http://www.bavarian-board.co.uk/forum_posts.asp?TID=47656&PN=1 - here.



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Posted By: jetsetwilly2000
Date Posted: 20-June-2011 at 09:57
Yep, sounds like swirl flaps (tho I don't know that engine).

The good news is they're actually quite cheap to blank off, just a fair amount of labour, and you shouldn't need to replace anything else, so don't despair!

It is urgent tho - if they're sticking then I guess they might break off, and that really would bin your entire engine.


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