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Magna-flow exhaust rattle

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psychonosspaz

Go Kart Champion
Location
PNW
So my buddy and I installed the magna-flow this weekend on the GTI and what a great sound! The problem is I am getting inconsistent rattle from the back, normally on idle...sometimes when I shut car off also it makes a horrible rattling sound...anyone have any experience with this?
 
Mk7Matt

Mk7Matt

Drag Racing Champion
Location
KC Metro
Car(s)
MK7 GTI
psychonosspaz said:
So my buddy and I installed the magna-flow this weekend on the GTI and what a great sound! The problem is I am getting inconsistent rattle from the back, normally on idle...sometimes when I shut car off also it makes a horrible rattling sound...anyone have any experience with this?
Click to expand...

You might want to check that the exhaust isn't hitting the black exhaust tunnel brace...had that issue with mine and bought an additional exhaust hanger (near the muffler) and added some washers between the bar and the floor.
 
Finglonga

Finglonga

Drag Racing Champion
Location
Stafford, UK, Earth, Solar System.
Rattle or do you mean it is knocking on the bodywork somewhere?
 
A

alan.hubin

New member
Check the middle brace and also the plastic valence. My exhaust rubbed on a bolt up forward by the transmission, the black brace, and the valence.
 
ryohei47

ryohei47

Ready to race!
Location
SF Bay Area
Mine rattles a bit on idle too, I've tried adjusting it multiple times but it's still rattling under load around 3k RPM. I think I'm going to get under the car this weekend and see what else can be done..
 
bdelaney4000

bdelaney4000

Ready to race!
Location
Chester, NH
Sorry to hear that bud, sometimes those exhaust rattles can just drive you nuts. About a month ago I installed a downpipe on my MK7 and had to crawl under the car 3 or 4 times to make adjustments to avoid some of the rattles, granted some of it was my own stupidity on where I secured the o2 sensor harness extension but I did have to adjust a couple clamps as well as pull the exhaust towards the rear of the car as one of the downpipe hangers was rubbing against the sub-frame ever so slightly on decel.

If I could offer a few solutions I've learned... instead of using band clamps on slip fittings use lap joint clamps and secondly exhaust paste. Both will help sure up some of those iffy connections. Best of luck to ya!
 
T

Tone1

Ready to race!
Location
Michigan
Check the rear control arm clearance as well. I solved my back end exhaust rattle with poly hangers and a few washers between the hanger brackets and the body.
 
ryohei47

ryohei47

Ready to race!
Location
SF Bay Area
Tone said:
Check the rear control arm clearance as well. I solved my back end exhaust rattle with poly hangers and a few washers between the hanger brackets and the body.
Click to expand...

I think that's exactly where my rattling comes from. What are poly hangers? I'm assuming you mean putting spacers so that the exhaust hangs slightly lower giving it more room from the rear control arm?
 
ryohei47

ryohei47

Ready to race!
Location
SF Bay Area
Mk7Matt said:
You might want to check that the exhaust isn't hitting the black exhaust tunnel brace...had that issue with mine and bought an additional exhaust hanger (near the muffler) and added some washers between the bar and the floor.
Click to expand...

I was bumping into the control arm because I couldn't position the exhaust exactly in the middle of the control arm space. I added washers for the exhaust hangers near the muffler and it made all the difference. Thanks for the recommendation
 
Mk7Matt

Mk7Matt

Drag Racing Champion
Location
KC Metro
Car(s)
MK7 GTI
ryohei47 said:
I was bumping into the control arm because I couldn't position the exhaust exactly in the middle of the control arm space. I added washers for the exhaust hangers near the muffler and it made all the difference. Thanks for the recommendation
Click to expand...

Awesome! Glad I could help!
 
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