Swirl Flaps Operation 

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Great explanation... Many thanks for sharing. Picking my first D5 car tomorrow and need to know as much about things like this ;)

Thanks for this, very very very informative explanation. The swirl control arm has broken off on my D5 2.4 2009 Volvo XC90... couldn't fathom what it actually did. Found the name in the Haynes manual and then your brilliant video explained what it does! So now I know and know why it's also covered in oil!!! The boost is leaking!!! Got a bog job ahead of me now but at least I know it needs to be done! Cheers bud! Sammi x

Very illustrative representation. Thanks 👍👍

Very very interesting Dave, learnt something there, cheers.

Thanks buddy, great info!

Thank u for making this video. Great explanation.. A small query. What is the point in adjusting the air flow direction using swirl flaps.. How the combustion could be better while adjusting the air flow direction.

Fantastic explanation. One question if these control air into the engine where does the soot come from that I have seen on them. I like your video's alot.

Thanks for the info But do they help much? Thanks Dave

Hi there, nice demonstration, it's clear how they work. But...no explanation why are they foe and what is advantage without them ? If the car maker install them, then why ?

very well explained, and demonstrated, cheers dave , 👍

So when you lock these fully opened does it improve anything? Probably not by your explanation.

Hi , very good JOB! i have a question regarding flaps on Volvo D5 , mine when i push the rod ( i disconnect the commande side) with my finger , it seems that is very easy and without any resistance. Yours is the same? it could mean that the flaps inside do not move? how can check it without removing the intake manifold? best regards

Thanks answered a question I had

Bout yee,deleted them on my e39 530d when I owned it about 15 years ago and have done the same on my 3.0 tdi a4 I drive now,too many horror stories online about them

For swirl flaps electrically actuatted, the default position is open?

a very good explanation dave

What's the cost of replacing these at a garage? I have a V70 2.4d and they need replacing... Many thanks 👍👍

Nice follow up video Dave , shows Joe P how they work , well done ,

Thanks

Must be getting a bit tight in the garage with all those cameramen about 😀 Good description of operation.👍

2:50 - when you started pumping I expected a knife man to burst in around the shower curtain.

Hi Dave, came looking at your RU-vid uploads for info on VW/AUDI 1.6 TDI CAYC air intake manifold swirl flap motor. Having watched your vid on 1.6 tdi EGR cooler valve how it works. I am assuming swirl flap motor also uses 5.0+ & 5.0- to actuate the swirl flap shaft. Please can you provide 5.0+ & 5.0- pin numbers. As l cannot find a wiring diagram for this motor.

And all this time, I thought they would variably block off one of the two intake ports behind one of the two intake valves, causing air to actually swirl *inside* the combustion chamber due to the imbalance of pressure and air volume between the two (asymmetrical) intake ports versus simply getting a bit turbulent as you purport. If your theory is to hold water, please explain how this butterfly valve creates turbulence when it is full closed or full open.

Had one fall to bits on a alfa romeo mito. Sucked the flap in and distoyed the engine. When I showed the customer she just cried. We sold the car as a going concern rather than swap the engine

Thanks Dave, may I never buy a car with flaps.

Good

Can you explain how you switch and program them?

Can we just delete this or leave it permanently open... Like egr delete and dpf delete?

Split Screen video!!!! Your getting fancy Dave

Can bē that new swirl flaps can be harder to turn?

Started changing my swirl flaps and one of them is missing, the one opposite the linkage end. Do they get sucked in the engine if they fall in the port. Tried vacuuming out but nothing is coming out of the hole. Waiting for a camera to arrive

That was very interesting but I don't think you emphasised enough that it is exhaust gases that are destroying the swirl flaps and clogging up all the pipes and EGR valve on the way. But at least the repair is a job that an average DIY person can do: no heavy lifting, no special tools, no getting underneath the car. I hate the fact that the designers have to do all this to meet emissions in a lab test but once it has done a few thousand miles all the good intentions have gone out of the window leaving the owner with big repair bills.

Whole video is yapping 4:49 for ACTUAL explanation