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gine39530d

Blanking swirl flaps is good?

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"Why swirl flaps?"

https://en.wikipedia.org/wiki/Swirl_flap

 

"Is blanking them good for the M57 engine?" 

Short answer is yes on our now quite elderly engines. Failure to do so can result in enough damage to scrap the  engine. See the Wikipedia entry above for more info. Swirl flaps only our cars fitted with an automatic gearbox. Manual models don't have swirl flaps.

 

"Any loss of power and any future problems in the future"

According to the Wiki article there will be some minor loss of driveability at smaller throttle openings. (Emissions may also be a little greater without them.)

No future problems, in fact quite the reverse! Removing them means you're unlikely to have a lunched engine due to securing screws and/or flaps being ingested by the engine. Also less likely to have EML lights due to compromised swirl flaps becoming inoperative/stuck because of a coating of thick black crud.

 

In general, removing them from our engines is a win/win.

Edited by DepthHoar
Edit for typo

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Mine got done a few years ago and I have never noticed any roughness or lack of drivability, at any speed or temperature.

Just for your peace of mind, do it.

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11 minutes ago, FIBAMAN said:

didnt remove mine, but indy disconnected in open position a few years ago, never had any bother. Now on 245k

 

Are you seriously going to leave the timebombs there? They can break even if they are permanently in open position.

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is it ok if I smother them all with 380 C silicone based gasket grease?

and yes, I bought wrong 33mm blanks from aliexpress :)

and yes somebody else has already removed swirl flaps

and yes I lost two backup rings :)

This is how you learn

 

 

Edited by gine39530d

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On 12/11/2017 at 10:58 PM, gine39530d said:

is it ok if I smother them all with 380 C silicone based gasket grease?

and yes, I bought wrong 33mm blanks from aliexpress :)

and yes somebody else has already removed swirl flaps

and yes I lost two backup rings :)

This is how you learn

 

 

bad idea it was. 

had to clean the surfaces later

 

 

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On 12/11/2017 at 7:29 PM, Clavurion said:

 

Are you seriously going to leave the timebombs there? They can break even if they are permanently in open position.

I take your point, but they have been like that for a very long time.

I recently had to weigh up cost / effort / time etc. and as the car is now only used intermittently, not for long runs, has very little intinsic value, I dont want to spend any more money on it, so am afraid it is consigned to being the family load humper (tip runs etc). until the tax runs out or it falls down with serious fault.

Probably worth more in parts (all mechanicals kept up to scratch).

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