Exhaust Question

scousegit · 15 Apr 2008 at 22:54

Hi, on my S2000, when im slowing down in 3rd or second the exhaust either in the middle or on the back boxes seems to make a louder vibrating kind of sound than when in other gears. Would this just be down to the exhaust being lose? or is this normal lol.

the noise is there when letting off the gas ( coasting ) not a good thing i know. ( fuel economy lol ) when in them specific gears aswell

loltim · 15 Apr 2008 at 22:56

Is it definitely a vibration and not a rasp?

Get under the car and give it a good wiggle, see if it's touching any heatshields etc.

scousegit · 15 Apr 2008 at 23:02

could be a "rasp" come to think of it

never thought that of that term before lol

Leeum · 15 Apr 2008 at 23:05

Could be rattling off a heatshield. Get it on a ramp and take a look.

By coasting in gears I assume you mean engine braking?

Gaijin · 15 Apr 2008 at 23:07

It's probably the exhaust resonating as you are slowing down and catching the bulkhead or some other nearby element.

It probably does it as you change up as well, but you pass the rev point at which the exhaust resonates too quickly when accelerating.

Try to recreate it by holding the revs at certain points. Get under it and try to look for potential contact points and bolster them with rag or such.

rG-tom · 16 Apr 2008 at 12:00

i think a lot of s2000s did this, when i test drove conanius' for him it had the same noise in second/third on overrun.

-Neil- · 16 Apr 2008 at 12:05

No ratttles here, some interesting noises but much less than the DC2 made

Neil.

rG-tom · 16 Apr 2008 at 12:06

-Neil- said:
No ratttles here, some interesting noises but much less than the DC2 made

Neil.

offtopic but i've added you to msn, you're never online?! new addy?

Psycrow · 16 Apr 2008 at 13:09

Since I fitted a decat to the teg it rasps between about 2-4k rpm and pops when you change gear at high revs.

If your car has always done it then its probably just a feature of the exhaust. Get it up on stands or on a ramp, blip the throttle and see if its leaking or rattling anywhere.

-Neil- · 16 Apr 2008 at 13:12

rG-tom said:
offtopic but i've added you to msn, you're never online?! new addy?

I don't use it much, only when I'm at home in Wiltshire. I work at Stansted doing nights usually 10 days on and 2 or 3 off.

I'm on my days off at the moment so will be on msn later, going out for a drive seeing as the suns out

Neil.

-Neil- · 16 Apr 2008 at 14:23

Ah, just amended my trust details. That's my account from 3/4 years ago

Neil.