MINI2

THE ITCH · Dec 7th, 2005, 02:23 PM

First I'd like to say I'm new to MINI2 and hi to all. I am patiently waiting for a delivery of a JCW GP. In anticipation of my new MINI I have been browsing these threads looking for ways to improve the performance of my much anticipated new car. One of the things that I've noticed is the common problem of a misaligned bypass valve. My question is if there is any detailed instructions on how to check if the bypass valve is completely closing and aligned correctly. Any "how to instructions" along with pictures if possible would be very helpful.
Thanks for your help!

Loui · Dec 7th, 2005, 08:05 PM

Apparenlty they have been thread locking these to stop them been played with

THE ITCH · Dec 7th, 2005, 10:26 PM

I had not heard of this. How are they thread locking it?

Bilbo Baggins · Dec 7th, 2005, 10:35 PM

Before you go taking a wrench to anything I have a simple question. Do you really think that BMW/MINI has such low quality control that it can't purchase/make a bypass valve that is adjusted just as it was designed to be? If the engineers at BMW/MINI wanted the valve closed completely it would be.

THE ITCH · Dec 7th, 2005, 10:55 PM

Their have been numerous posts on this subject of getting yo yo effects on throttle response and lack of power. Apparently one of the main causes has been a bypass valve which has not been adjusted properly. We all here reports of some cars being stronger than others when fitted with the same equiptment. I have been in manufacturing engineering most of my adult life and am fairly aware of tolerances in production. I'm just looking to correct any small leaks in power that i can find. Just like to tinker I quesss.

roland2003 · Dec 8th, 2005, 09:02 AM

Hi Guys,From the factory every MCS weve ever worked on has a leaking bypass valve. Every car will benefit from having it adjusted properly. Not only will you gain more power,but better economy too. On full throttle any loss of boost is bad news.
The power increase is probably around 5-8 bhp for most cars. The good news is anyone who has a GT Tuning conversion gets this valuable upgrade automatically at no extra cost.
I beleive in the UK we are the only tuner that include this.
Regards Roland GT Tuning

Adrian_T · Dec 8th, 2005, 09:07 AM

And the question is...

Can we do this ourselves or do we need to visit Roland GT

And another thing - is this a modification that need declaring or is it just 'maintenance'?

Seems another FREE 5-8bhp is not to be sniffed at - seems better value than an induction kit.

Any ideas?

Loui · Dec 8th, 2005, 09:53 AM

Quote: Originally Posted by THE ITCH

I had not heard of this. How are they thread locking it?

Its only what ive heard from one of my mates who has some GTT bits an he had to have his bypass valve replaced under warranty, afterwards he had lost power an MPG, he had a look at the valve being fairly handy an it was thread locked, i think roland sorted it out from what he said

Cooper_si · Dec 8th, 2005, 10:08 AM

These pics may help...this is just one of the many valves we have done, this was actually fitted to my own MINI COOPER S...as you can see the first pic should be completely closed...its way to open

But then once its adjusted , this is what its meant to look like, just latley a few of the newest 05 MINIs seem to be coming through correctly like this.....

...and here is the adjustment grub screw. Mine was a Feb 2002 model which had thread lock.....easy adjustable though.

THE ITCH · Dec 8th, 2005, 02:03 PM

The term you are using "thread locked" is that just a form of locktight or similiar thread adhesive.

Loui · Dec 8th, 2005, 03:17 PM

Quote: Originally Posted by THE ITCH

The term you are using "thread locked" is that just a form of locktight or similiar thread adhesive.

From what ive been told it seems they have been using something like thread lock to stop these things being tampered with

Cooper_si · Dec 8th, 2005, 03:28 PM

Quote: Originally Posted by Loui

From what ive been told it seems they have been using something like thread lock to stop these things being tampered with

...dont agree with this...as ive done many with good results loui

Loui · Dec 8th, 2005, 03:51 PM

Quote: Originally Posted by Cooper_si

...dont agree with this...as ive done many with good results loui

only recently from what ive heard si older ones they didnt bother doing

woodsy_bear · Dec 8th, 2005, 05:07 PM

How easy is this to do? And should it be completely closed?

THE ITCH · Dec 8th, 2005, 05:31 PM

If someone could please help here who have done this check in the past. I assume that you have to remove the throttle body first and remember to replace the O-ring when reinstalling. Then I assume you can then remove the bpv to check it. This is only an assumtion on my part as i have not taken delivery of my mini yet. Anyone out there who can be a little more specific?

Jaffa Racer · Dec 8th, 2005, 06:03 PM

you got it a glue on the threads

Loui · Dec 8th, 2005, 06:05 PM

PM cooper si hes done a few

Fisher · Dec 8th, 2005, 06:22 PM

Where is that valve?

It is that on throtlle ?

What is about that 8 hp and losing boost?

I have seen on the compresor one red thing, that is going out and in....like one valve, what is that?

thanks bye

Scoobystu · Dec 8th, 2005, 06:51 PM

Hi

Do you have to remove the unit to adjust it or can it be done in situ. I can see the adjustment screw from the front. Can I just get and allen key and cut it down so it fits in the tight space and just unscrew it a little.

thanks Stuart

XTREEM · Dec 8th, 2005, 09:40 PM

The valve is mounted on the tube between the throttle body and charger.

First remove the throttle body, to get at the valve. It becomes obvious once you have the throttle body off what else needs doing to get the by pass valve off and on the bench.

Then shining a torch from the rear, look in the other end and see if you have light bleeding through around the butterfly. "like in the photo above" If so "as stated above" there are 3 screws which come into play the 2 on the butterfly itself and the stop screw. On my car all 3 needed adjusting!!

Its really a bit of trial & error from here. By loosening the 2 butterfly screws and moving the butterfly around and closing the butterfly until you get the completely closed valve we desire. You probably wont nail this in 1 attempt and will have to loosen & re tighten the screws a couple of times.

When finished make sure all the screws are tight you dont want these going through the charger!!!!!!! also put a smear of oil on the throttle body O ring and replace the BMW hose clamp which mount the by pass valve with conventioal hose clamps. Make sure to plug the throttle body wiring back in.

Its a easy straight forward job which most people can do easily.

John.

Dec 7th, 2005, 02:23 PM	#1
THE ITCH MINI2 Regular Join Date: Oct 2005 Location: Pulaski, NY Local Time: 06:30 PM Posts: 126 Offline	Bypass valve recalibration First I'd like to say I'm new to MINI2 and hi to all. I am patiently waiting for a delivery of a JCW GP. In anticipation of my new MINI I have been browsing these threads looking for ways to improve the performance of my much anticipated new car. One of the things that I've noticed is the common problem of a misaligned bypass valve. My question is if there is any detailed instructions on how to check if the bypass valve is completely closing and aligned correctly. Any "how to instructions" along with pictures if possible would be very helpful. Thanks for your help!

Dec 7th, 2005, 08:05 PM	#2 (permalink)
Loui 230whp an counting My Classifieds Join Date: May 2002 Location: Mini Addiction Local Time: 11:30 PM Posts: 3,155 Offline	Apparenlty they have been thread locking these to stop them been played with WWW.MINIADDICTION.CO.UK

Dec 7th, 2005, 10:35 PM	#4 (permalink)
Bilbo Baggins MINI2 Master Join Date: Oct 2001 Location: Shire, Middle Earth Local Time: 06:30 PM Posts: 8,854 Offline	Before you go taking a wrench to anything I have a simple question. Do you really think that BMW/MINI has such low quality control that it can't purchase/make a bypass valve that is adjusted just as it was designed to be? If the engineers at BMW/MINI wanted the valve closed completely it would be. Motor on, Dudes and Dudettes!!! '06 MCS SB/S '02 MCS DS/W (retired)

Dec 8th, 2005, 09:02 AM	#6 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 11:30 PM Posts: 2,736 Offline	Hi Guys,From the factory every MCS weve ever worked on has a leaking bypass valve. Every car will benefit from having it adjusted properly. Not only will you gain more power,but better economy too. On full throttle any loss of boost is bad news. The power increase is probably around 5-8 bhp for most cars. The good news is anyone who has a GT Tuning conversion gets this valuable upgrade automatically at no extra cost. I beleive in the UK we are the only tuner that include this. Regards Roland GT Tuning www.gttuning.com

Dec 8th, 2005, 09:53 AM	#8 (permalink)
Loui 230whp an counting My Classifieds Join Date: May 2002 Location: Mini Addiction Local Time: 11:30 PM Posts: 3,155 Offline	Quote: Originally Posted by THE ITCH I had not heard of this. How are they thread locking it? Its only what ive heard from one of my mates who has some GTT bits an he had to have his bypass valve replaced under warranty, afterwards he had lost power an MPG, he had a look at the valve being fairly handy an it was thread locked, i think roland sorted it out from what he said WWW.MINIADDICTION.CO.UK

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Dec 7th, 2005, 10:26 PM	#3 (permalink)
THE ITCH MINI2 Regular Join Date: Oct 2005 Location: Pulaski, NY Local Time: 06:30 PM Posts: 126 Offline	I had not heard of this. How are they thread locking it?

Dec 7th, 2005, 10:55 PM	#5 (permalink)
THE ITCH MINI2 Regular Join Date: Oct 2005 Location: Pulaski, NY Local Time: 06:30 PM Posts: 126 Offline	Their have been numerous posts on this subject of getting yo yo effects on throttle response and lack of power. Apparently one of the main causes has been a bypass valve which has not been adjusted properly. We all here reports of some cars being stronger than others when fitted with the same equiptment. I have been in manufacturing engineering most of my adult life and am fairly aware of tolerances in production. I'm just looking to correct any small leaks in power that i can find. Just like to tinker I quesss.

Dec 8th, 2005, 09:07 AM	#7 (permalink)
Adrian_T MINI2 Regular Join Date: May 2005 Local Time: 10:30 PM Posts: 255 Offline	And the question is... Can we do this ourselves or do we need to visit Roland GT And another thing - is this a modification that need declaring or is it just 'maintenance'? Seems another FREE 5-8bhp is not to be sniffed at - seems better value than an induction kit. Any ideas?

Dec 8th, 2005, 10:08 AM	#9 (permalink)
Cooper_si the DASH LIGHT king ? ;) Join Date: Sep 2004 Location: Nr Melton Mowbray Local Time: 10:30 PM Posts: 512 Offline	These pics may help...this is just one of the many valves we have done, this was actually fitted to my own MINI COOPER S...as you can see the first pic should be completely closed...its way to open But then once its adjusted , this is what its meant to look like, just latley a few of the newest 05 MINIs seem to be coming through correctly like this..... ...and here is the adjustment grub screw. Mine was a Feb 2002 model which had thread lock.....easy adjustable though. THE Legend who helps ALL MINI owners

Dec 8th, 2005, 02:03 PM	#10 (permalink)
THE ITCH MINI2 Regular Join Date: Oct 2005 Location: Pulaski, NY Local Time: 06:30 PM Posts: 126 Offline	The term you are using "thread locked" is that just a form of locktight or similiar thread adhesive.

Dec 8th, 2005, 03:17 PM	#11 (permalink)
Loui 230whp an counting My Classifieds Join Date: May 2002 Location: Mini Addiction Local Time: 11:30 PM Posts: 3,155 Offline	Quote: Originally Posted by THE ITCH The term you are using "thread locked" is that just a form of locktight or similiar thread adhesive. From what ive been told it seems they have been using something like thread lock to stop these things being tampered with WWW.MINIADDICTION.CO.UK

Dec 8th, 2005, 03:28 PM	#12 (permalink)
Cooper_si the DASH LIGHT king ? ;) Join Date: Sep 2004 Location: Nr Melton Mowbray Local Time: 10:30 PM Posts: 512 Offline	Quote: Originally Posted by Loui From what ive been told it seems they have been using something like thread lock to stop these things being tampered with ...dont agree with this...as ive done many with good results loui THE Legend who helps ALL MINI owners

Dec 8th, 2005, 03:51 PM	#13 (permalink)
Loui 230whp an counting My Classifieds Join Date: May 2002 Location: Mini Addiction Local Time: 11:30 PM Posts: 3,155 Offline	Quote: Originally Posted by Cooper_si ...dont agree with this...as ive done many with good results loui only recently from what ive heard si older ones they didnt bother doing WWW.MINIADDICTION.CO.UK

Dec 8th, 2005, 05:07 PM	#14 (permalink)
woodsy_bear MINI2 Regular Join Date: Nov 2004 Location: Midlands, UK Local Time: 11:30 PM Posts: 306 Offline	How easy is this to do? And should it be completely closed?

Dec 8th, 2005, 05:31 PM	#15 (permalink)
THE ITCH MINI2 Regular Join Date: Oct 2005 Location: Pulaski, NY Local Time: 06:30 PM Posts: 126 Offline	If someone could please help here who have done this check in the past. I assume that you have to remove the throttle body first and remember to replace the O-ring when reinstalling. Then I assume you can then remove the bpv to check it. This is only an assumtion on my part as i have not taken delivery of my mini yet. Anyone out there who can be a little more specific?

Dec 8th, 2005, 06:03 PM	#16 (permalink)
Jaffa Racer MINI2 Master Join Date: Nov 2003 Local Time: 11:30 PM Posts: 1,270 Offline	you got it a glue on the threads

Dec 8th, 2005, 06:05 PM	#17 (permalink)
Loui 230whp an counting My Classifieds Join Date: May 2002 Location: Mini Addiction Local Time: 11:30 PM Posts: 3,155 Offline	PM cooper si hes done a few WWW.MINIADDICTION.CO.UK

Dec 8th, 2005, 06:22 PM	#18 (permalink)
Fisher MINI2 Regular Join Date: Dec 2004 Local Time: 12:30 AM Posts: 234 Offline	Where is that valve? It is that on throtlle ? What is about that 8 hp and losing boost? I have seen on the compresor one red thing, that is going out and in....like one valve, what is that? thanks bye

Dec 8th, 2005, 06:51 PM	#19 (permalink)
Scoobystu MINI2 Newbie Join Date: Mar 2002 Local Time: 11:30 PM Posts: 27 Offline	Hi Do you have to remove the unit to adjust it or can it be done in situ. I can see the adjustment screw from the front. Can I just get and allen key and cut it down so it fits in the tight space and just unscrew it a little. thanks Stuart

Dec 8th, 2005, 09:40 PM	#20 (permalink)
XTREEM MINI2 Master Join Date: Oct 2004 Location: Batemans Bay Local Time: 09:30 AM Posts: 845 Offline	The valve is mounted on the tube between the throttle body and charger. First remove the throttle body, to get at the valve. It becomes obvious once you have the throttle body off what else needs doing to get the by pass valve off and on the bench. Then shining a torch from the rear, look in the other end and see if you have light bleeding through around the butterfly. "like in the photo above" If so "as stated above" there are 3 screws which come into play the 2 on the butterfly itself and the stop screw. On my car all 3 needed adjusting!! Its really a bit of trial & error from here. By loosening the 2 butterfly screws and moving the butterfly around and closing the butterfly until you get the completely closed valve we desire. You probably wont nail this in 1 attempt and will have to loosen & re tighten the screws a couple of times. When finished make sure all the screws are tight you dont want these going through the charger!!!!!!! also put a smear of oil on the throttle body O ring and replace the BMW hose clamp which mount the by pass valve with conventioal hose clamps. Make sure to plug the throttle body wiring back in. Its a easy straight forward job which most people can do easily. John.

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