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MG MGF Technical - K&N Filters - Important

IMPORTANT IFORMATION
....................

According to Rover/MG the clip holding the air pipe to the throttle body should only be a spring type clip.

Worm driven (Jubilee) clips, as supplied with the K&N, can distort the throttle body and this in turn can cause a 'sticky' throttle.

So at the first opportunity get the fitting checked that distortion has not taken place - and be warned if you have used a Jubilee type clip the Rover will not cover any costs.

The above information is from an official source, but please do not ask me which.

Ted
Ted Newman

That is a problem Ted- thanks for bringing it to our attention.

The original spring-type clip will not fit over the K&N replacement spacer tube. Is there any known alternative?

I haven't suffered any problem with the K&N filter installation- but that maybe down to fortuitous careful application of the jubilee clip. Just be careful is the moral here.

Perhaps we could get Lesley to comment on this issue?

Rob
Rob Bell

Sounds like a job for a large cable tie ?
David Smith

I think that the K&N spacer hose is made of too thicker grade of rubber for that idea to work David...

Rob
Rob Bell

I seem to recall the instructions for fitting the K&N warn against overtightening the jubilee clip - but they dont warn of the consequences of doing so. Perhaps they should.

Paul
P9 VLS
Paul

I seem to remember the instructions (and the FAQ?) saying something about not tightening the ring too much because of this problem.

I think this is quite clearly stated in the instructions from K&N. I'll have another look you will only hear from me if I'm wrong.
Tony Smith

2. Fit the filter and hose assembly to the throttle body and firmly tighten the clips on the hose. Rotate the filter untill the K&N logo is streight, then tighten the clip one full turn (360 degrees) NO MORE. Don't overtighten the clip.

I what it says, so no specific warning, more a suggestion that some reason exists to not over tighten the clips.

I think the FAQ expands on this, and actually tells you why.
Tony Smith

imho you'd have to use strong arm tactics to tighten that clip so hard that it compressed the throttle body.
jt
John Thomas

The inference was that a worm drive clip can cause distortion, this does not mean that it will compress but possibly cause it to go out of shape, ie become oval rather than round.

The actual message to MG mechanics is that should they come across this type of clip it MUST be changed.

As I said this is from an official source and is a directive to MG mechanics.

As the old saying goes:- Dont shoot the messenger because you dont like the message!

Ted
Ted Newman

Sorry, did I miss something, who got shot? :-)
Tony Smith

I have mailed the K&N chaps to see if they have any thoughts/ suggestions in light of the information that Ted has put forward.

Rob
Rob Bell

Plastic throttle body distorts far easier than the previous standard cast alloy variety. Worm drive clips can be used in some exhaust applications where considerable clamping loads can be generated. The same loads on the plastic body will be reflected in the body distoring in a manner that reflects the inner shape of the moulding, so the distortion will be uneven. Also this will occur over a period of time and only on the most severely tightened ones will it be obvious when first fitted.

Rog
Roger Parker

This thread was discussed between 08/03/2000 and 10/03/2000

MG MGF Technical index

This thread is from the archive. The Live MG MGF Technical BBS is active now.