Exhaust Knocking...

[FlameR]

I recently went to JP exhausts to have my back box straightened up slightly and a new tip on my exhaust. since then, every now and again there's a really annoying knocking noise from (I assume) the exhaust. I've had a poke around and the exhaust seems sterdy, and there's ample gap between the recess, heat shield, rear axel etc from the exhaust, so I have no idea why it's knocking.

Any clues from someone who's experienced the same problem??

 

[sean_d]

Standard exhaust mounts are s**t. Try changing them

 

[FlameR]

I did that a few months back to a reinforced one...!

 

[fossie]

When does it knock, when the car is cold????? Or is it totally random

 

[FlameR]

pretty random but sometimes over speed bumps

 

[ForceIndia]

Centre section?

 

[FlameR]

as far as I'm aware they didn't even touch the centre section, they only altered the back box and changed the tip!

 

[FlameR]

it also knocks a bit when the engine labours when changing gear a bit early! (usually going from 1st to 2nd when driving slowly)

 

[ForceIndia]

If the mount is uprated, won't that just transmit the force to another part of the system? My centre section sits quite low, catches speed bumps.