Rattly Mongoose

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

Fitted a Mongoose exhaust a few weeks ago with a mate, and I've noticed it's rattling. It's only really noticeable on pull-away, and also when I'm idling when I got a full car (when suspension is compressed). If everyone gets out of the car when it's idling, then rattling stops. Put weight back in the car and rattling starts again etc. Figured out where it's rattling, but dunno how the hell to solve it..........

That pic is taken from just infront of the rear passenger side wheel, looking in at the exhaust. I dunno what you'd call the part of the car that it's rattling against, but for now I'm gonna call it the axle lol. Well as you can see it's VERY close to the axle and that's with nobody in the car, when people get in and car sits lower, it actually sits on the axle and rattles like a bitch. So I basically have 2 options I think (unless anyone can give me another one)........

Option 1 - Try and wedge a heat proof bit of rubber or something between the exhaust and 'axle' to stop the rattling. I have a few spare exhaust hanger rubber things here, so could cut one of those up and try and do it. Dunno if that'd work though.

Option 2 - Try and move the exhaust to make it sit higher somehow. But....HOW?? Maybe we've fitted the joins at the wrong angle or something? But then it wouldn't all line up surely, and the back box would be all kifted? We must have got it right like. Dunno.

Anyone else got this problem? Got any ideas? It's not so much the noise I'm concerned with, it's the fact that I'm probably eventually gonna wear through me damn exhaust. But noise is annoying. It makes me look really 'classy' when pulling away. You can see everyone pointing like "heheh.....SHED". Grrrrr Evil or Very Mad

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

the problem is the mongoose systems are missing a bracket so it will hit the axle.

Their fault for being cheap muppets.

Either get a bar welded onto it or try and jubilee clip it up out of the way with a bit ofg wire or something.

If you fit a pad or somethign ti will still clonk just not rattle for a while.

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

Okay, cheers Chris. Just looked at the pics I've got of the mongoose & original exhaust next to each other on the floor and I see what you mean about the missing bracket now. Completely didn't notice that before. Doh

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

the old rattly exhaust eh? my scorpion did it (in the place you indicate), the (non OE) standard one did it and my magnex does it (even with the extra bracket thing).

fucking annoying.

At the moment the magnex rattles against the back corner of the central heatshield thing under the car. I cant bend it out of the way anymore than it is. Seriously pisses me off, i was an inch away form just bashing a big dent in the pipe to clear it with a big hammer the other week. Evil or Very Mad

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

Ah well at least it's not just me then! I was lookin at jubilee clips & heavy duty cable tie things in halfords (to try and pull exhaust up a bit higher like chris said) and then one of the staff came over and asked was I okay and so I said what I wanted the clips for and he was like "hmm you can't really change the position of an exhaust by using clips, it just won't work. You'll need to adjust the angle of all the joins to get it to sit a bit higher over the 'axle' to stop it rattling".......whic is fair enough I spoze, but then he started talkin shite lol. He was like "laguna is it?" and I was thinking to myself "hmm......how the FUCK does he know it's a renault!!?"....maybe he saw Renault key in my hand, who knows.......but anyway.....I was like "nah, 19 16v" and he was like "ooooh, they're bastards" and began explaining all of the bends & stuff to me and I was like "oooh, clever boy ain't ya" and then I explained that the mongoose system didn't have the extra silencer in towards the back, and so it was missing the hanger that used to come off that, and that's probably why it was hanging low. And he was like "it's missing a silencer??? Mate, I'd be a bit worried about that" and I was like "umm.......I wouldn't be, cuz as far as I know none of the stainless systems I know of have that silencer in" and he was like "hmmm......I think u've been done mate" and I was like "DONE?? What?? No it's meant to be like that mate, I am frikkin sure of it" and he was like "fair enough". Bloody daft bugger. Anyway, I don't even know what I'm ranting on about now lol. Maybe I should just stop talking. Yup, sounds like a good plan!

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

lol halfords have no idea what there talking about, i asked for a valve spring compresor, and he claimed that it was a 'specialist tool' only availiable from places like snap on LOL, so i then took him to where it was and in the shop showed him what it looked like. Razz

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

Hehe lol. Yeah, if I'd told him I'd got a de-cat pipe and that there was no longer a cat on the car, he'd have been like "you mean there's no cat in ur de-cat pipe??" I think you've been done mate" Rolling Eyes

doh. Ah well, I would trust you guys over a halfords member of staff any day of the week, so I'm gonna try and hoist the exhaust up higher with some sort of genious invention I come up with!! Plus the fact that the halfords guy looked like he'd just walked out of primary school didn't help the me-trusting-him thing lol

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

weld a small bracket on the exhaust, just over the torsion bar and then clip something to the underneath of the car. or, you could press a dent in it to clear the torsion bar.

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

I was gonna get another exhaust clamp, clamp it anywhere on the exhaust, but clamp something else in with it too that I can use to lift the exhaust up......if that makes sense? Like if I clamped a jubille clip to the exhaust, and then attached the rest of the jubilee clip to somewhere on the car & tightened it up, it'd lift the bugger up a bit. I'll see when I have a look underneath, cuz I dunno what the hell is anywhere that I can attach it to. Don't think there is anything actually! But weather is shit here at the mo, so won't be looking yet

Site Subscriber Joined: 29 Dec 2004 Posts: 395

I had a full magnex and decat on my clio and it rattled like hell.
Took the decat off for the MOT and it was cured. Turned out my decat was 10mm longer than the cat.

Site Subscriber Joined: 29 Jan 2005 Posts: 1108

Frikkin bloody frikkin! Jacked the car up and had a look to see if I could sort the rattle and not only is it rattling where I thought it was rattling (see pic at the top of page), but it seems to be rattling in another 374 places too Rolling Eyes

doh. Where it's rattling on the 'axle', if I make the exhaust any higher, it's just gonna rattle against what's above the axle. And it also seems to be rattling against the heatshield in the middle of the car. About 2ft back from the de-cat, just before the bend. Is really quite tight there, don't see how I can move it. Maybe cuz the car was jacked up and the exhaust was sitting differently. Cuz where it is normally close to the axle, it was up away from it more when the car was jacked up in the air. Ah well. Who knows. Might stick it in a garage and tell 'em to stop it rattling. Might also have a look with mate on the weekend if he can be arsed. Might also put up with the rattling by the looks of things Rolling Eyes

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

the heatshield, bend it. the axle, put a kink in the exhaust, only slight, but it will stop the rattling.

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

ok, for the axle issue you need to get a mate to help you.

Undo the clamp at the join. Get your mate to lift/twist the back box upwards whilst you do up the clamp again, tight.

As for the heatshield... i dont know about your mongose, but in my magnex, theres no place to bend it to, its already bent right against the floor of the car. Only option might be to chop a chunk off it.