stabilising / derattling a magnex exhaust

[jpmad4it2]

hey

ive had my magnex exhaust and decat on about 2 months now - and its all rattling like hell.

anyone got any tips on how i can stop there being so much movement in the exhaust. Is it possible to replace the renault bracket (that holds one side of the back box up) with a different bracket, preferbly one that doesnt allow as much movement?

j

 

[Friction]

not really anything on the market as a direct replacement, best to replace the mount and fill the voids in the mount (youll see what i mean if you look at the mount)

also might be worthwhile going for a uprated dogbone mount, thatll cut any movement caused by the engine.

 

[telford_mike]

where did you buy it? I never had a moments problem with mine, fitted by Demon Tweeks.

 

[Friction]

also check that its not just the headsheild knocking at the front

 

[GarethM]

some people recommend putting a ford rubber mount on the bracket replacing the renault one its supposed to make it alot more stable and lifts it up slightly

you can get them from halfords for about £2 - 3

 

[jpmad4it2]

Quote: Originally posted by Friction on 10 August 2005


not really anything on the market as a direct replacement, best to replace the mount and fill the voids in the mount (youll see what i mean if you look at the mount)

also might be worthwhile going for a uprated dogbone mount, thatll cut any movement caused by the engine.





you mean fill in the gaps around the renault rubber on the original bracket ? - as this is the rubber that allows all the movement - its too weak

 

[jpmad4it2]

Quote: Originally posted by telford_mike on 10 August 2005


where did you buy it? I never had a moments problem with mine, fitted by Demon Tweeks.

bought 2nd hand off ebay (only 3 months old)

fitted by local mechanic.

 

[jpmad4it2]

Quote: Originally posted by Friction on 10 August 2005


also check that its not just the headsheild knocking at the front

the problem is the original renault rubber in the original bracket - it allows the back box to move up and down and side to side too much.

Therefore when i go over bumps the pipe that comes out of the backbox and joins the midsection is hitting the arch of the heatshield.

 

[jpmad4it2]

Quote: Originally posted by phoenixy on 10 August 2005


some people recommend putting a ford rubber mount on the bracket replacing the renault one its supposed to make it alot more stable and lifts it up slightly

you can get them from halfords for about £2 - 3





you mean this replaces the original rubber on the renault bracket? Its the original rubber thats causing me the problems - it allows the backbox to move up too much and it hits on the heatshield. ive reshaped the heatshield the best i can - but i cant make it go further up as it up againnst the bottom of the car if you know what i mean - the only thing i can do it stop the backbox from rising up anymore.

 

[GarethM]

yeah thats what i mean, im having the same problem with my magnex twin at the moment, just need to get to halfords!!!

 

[jpmad4it2]

so its a ford rubber mount - what do i ask for then - a ford exhaust rubber mount???

 

[Nafoff]

will this ford rubber mount work on the mrk 1 phase 2 valver then as i am having the same problem with my magnex

 

[Day]

Use the secondry mount, just the one is not enough due to the weight of it!

Only problem I had with rattles was due to the heatshield knocking.

In fact get a new bracket from renault if its perished - £20 max.

 

[matty w]

I put a poly bush exhaust mount on my backbox,i got it from MPC,i got the ford one first but it still moved but doesnt now

 

[jpmad4it2]

Quote: Originally posted by Day on 10 August 2005

Use the secondry mount, just the one is not enough due to the weight of it!

Only problem I had with rattles was due to the heatshield knocking.

In fact get a new bracket from renault if its perished - £20 max.



whatd you mean the secondary mount?

i have 2 mounts - the magnex and the renault one. The rubber in the renault mount is ok - it just allows too much movement

 

[jpmad4it2]

Quote: Originally posted by matty w on 10 August 2005


I put a poly bush exhaust mount on my backbox,i got it from MPC,i got the ford one first but it still moved but doesnt now





where is MPC based - anyone got a contact number of website address?

is this just a rubber your talking about, or is it a full bracket??

 

[matty w]

Midland performance centre i havnt got a number,it was only universal polybush,if you know how long the mount needs to be http://www.rallydesign.co.ukwww.rallydesign.co.uk sell universal polybushes

 

[Pete]

Get a big hammer and hit the heatshield out the way! lol

 

[jpmad4it2]

^^lol it wont go anymore - its hitting the arch of the heatshield i.e. the upmost part of it - it was also hitting the side but i sortef that out - just bent it out of the way.

 

[Day]

Bet you wish you hadnt started to modify it now?

 

[jpmad4it2]

no not really - once these small niggly things are sorted it will be ok

 

[jpmad4it2]

Quote: Originally posted by matty w on 10 August 2005


Midland performance centre i havnt got a number,it was only universal polybush,if you know how long the mount needs to be http://www.rallydesign.co.ukwww.rallydesign.co.uk sell universal polybushes

http://www.rallydesign.co.uk/catalog/images/pxbush.jpg





this PolyX mount looks the same as the smaller magnex rubber(im not sure if its the proper mount, or whether its for illustartion purposes only), which i have tried too - and it still rattles/bangs.

plus im not really after a replacement magnex rubber the one i have seems ok- im looking for something to replace the original renault bracket rubber ( the kind of spider web rubber) as this is causing the problems

 

[jpmad4it2]

a few heavy duty zip ties have sorted the job out for now

 

[benji&eka]

i fabricated a fix for mine. basically a bump stop fitted inside the standard bracket, works well on mine, been on bout 4 months now no probs. i offered them on here for a fiver, but everyone thought that was too expensive! nothing i can do about that i was using dunlop rubbers and stainless steel bolts. you pay for quality. by the way it takes 2 mins to fit! all you need is a drill and an allen key.

 

[biojo]

benji&eka: u got a pic of this set up

 

[benji&eka]

http://img194.imageshack.us/my.php?image=exhaustfix8xt.jpg

 

[benji&eka]

try clickin this

http://img194.imageshack.us/img194/1281/exhaustfix8xt.jpghttp://img194.imageshack.us/img194/1281/exhaustfix8xt.jpg

 

[benji&eka]

http://img36.imageshack.us/img36/8688/dcfn00033vn.jpghttp://img36.imageshack.us/img36/8688/dcfn00033vn.jpg

http://img36.imageshack.us/img36/2689/fix4kx.jpghttp://img36.imageshack.us/img36/2689/fix4kx.jpg

 

[jpmad4it2]

still doesnt stop in from rising up - but i guess you could add 4 of those to the original bracket - top , bottom, left and right - then it wont move anywhere!! ill have 4 please - call it £15 with postage and packaging for a set of 4?????

I ahve just noticed that the decat and midsectin have dropped lower too - they are now cathcing onym driveway whereas before they never did

PAIN IN THE ARSE!!!


[Edited by jpmad4it2 on 12 August 2005 at 3:28pm]

 

[benji&eka]

you only need one, re-position the system away from the underbody by turning its join with the back box then fit the bump stop to prevent the exhaust striking the axle tube on speed humps, kerbs ect. the rubber is not to position the exhaust,but to reinforce the existing mount which is crap and cant take the weight of a stainless system

 

[jpmad4it2]

yeah but my problem is with the pipe hitting the top of the car above the rear axle i.e. i woul need the same kind of mount as yours, but with the rubber at the top of the mount, not the bottom to stop the backbox rising up over bumps etc.

I got the car on ramps today - the mechanic who fitted this exhaust didnt even put a jubille clamp/clip around the joint where the decat and midsection meet - so it was sagging down about an inch - sorted it now though. Damn cowboy mechanics.

 

[GarethM]

thats what i need a rubber stop on the bracket,

benji&eka where did you get that from?

 

[benji&eka]

made myself. can supply a limited number for a fiver each,

the parts list is:

dunlop self level valve end (adapted)

m8 nutsert

m8 stainless steel bolt

m8 stainless steel flat washer

 

[GarethM]

then you just drill a hole in the bracket and screw it in?

 

[benji&eka]

yup

 

[Gaz_]

is this a full system or just a back box?

i had the same trouble with a full system, (twin 3.5") the bend was hitting the underside of the car, above the axel, so i lowered the zorst a tad, and then it hit the axel as its lowered

after many months of adjusting and playing about with the dam thing, i found out the problem..... after the cat where the mid pipe of the zorst starts, there is a a sleeve that fits in the magnex, pull this out and take off 10mm then hammer it back in, all the way, the zorst will now fit 10mm further forward, and wont gave any more trouble

worked for me, and a few others. my zorst is nicely tucked under the bumper, doesnt catch the axel, and is lowered all the way down at the rears on coilovers



sorted

 

[jpmad4it2]

ah ha - could be my problem.

Its a full system - and the problem you had sounds very similar to mine. Ive fiddled and messed around so many times now i just cant get it right.

When you say take 10mm off - you mean just saw the damn thing off lol!!!

 

[Gaz_]

only off the sleeve yeah, unbolt the exhaust from the cat, take off the exhaust clamp, then hit the sleeve out of the mid box opening (not nice under a car) then chop off 10mm OF THE END THAT PUSHES INTO THE MIDDLE BOX............NOT THE END THAT JOINS INTO THE CAT!!!


Hit it back ALL the way into the middle box, retighten etc (might need some exhaust paste on the joint to the cat) The zorst will now sit 10mm further forward, but the back box may need some slight adjustment

job done
[Edited by gt_gaz on 13 August 2005 at 7:37pm]


[Edited by gt_gaz on 13 August 2005 at 7:40pm]

 

[jpmad4it2]

yeah i get ya - ill get under the car again sometime soon and see if i need to take 10mm off the thing that pushes into the mid section

 

[jpmad4it2]

here is my install:

http://i5.photobucket.com/albums/y164/jpmad4it/DSC00107.jpg


u see where the clamp is (around the section where the midesection joins the silder), well does it look like the slider could be hammered into the midestion even more - as a lot of it is still sticking out to the left hand side, isnt it? Or is that not possible until i take 10mm off the slider? Just wondering if i can get away with it by hammering it in more, instead of taking it out and cutting off 10mm.

rgds J