Exhaust outlet's, MOT's and Constuction & Use Regs

IainB · Post by **IainB** » Fri Mar 14, 2008 9:36 pm

Just wondered if anyone knew the rules on where an exhaust could exit?
Ive always seen exhaust at either the rear, or side exit at the rear wheels (i.e. Cobra and Street Eliminator cars)
Just noticed Perrys appears to be dumping at the front wing

http://peterdonaldson5305.fotopic.net/p48930470.html and has given me a nice idea for mine....question is, is it within the law??
Did have a google for vehicle construction and use regs, but all I can find are addendments to the main document

ian.stewart · Post by **ian.stewart** » Fri Mar 14, 2008 10:38 pm

Iain, this may help.
http://www.ukmot.com/mot_check.asp

IainB · Post by **IainB** » Fri Mar 14, 2008 11:00 pm

Thanks Ian,
So in theory, as long as a) its secure b) has no leaks and c) meets the emissions (visual test only due to age)...... anything goes?

DrDeAtH · Post by **DrDeAtH** » Sat Mar 15, 2008 5:55 pm

best thing to do is ask your local friendly MOT tester. at least that way you will have a yes or no straight away

john 215 · Post by **john 215** » Sun Mar 16, 2008 11:06 am

Hi Ian,
As a tester myself, would not fail side exit exhaust.Would advice if the car had headers like a Funny car

just in case predestrians get set on fire

Just looked at photo's no problem there.
Cheers John.

mgbv8 · Post by **mgbv8** » Mon Mar 17, 2008 5:09 pm

A mate of mine took his MGB for a test and was told by the tester that any side exit exhaust is illegal in the UK.
I told him to tell the tester he was wrong but he just went elswhere.
The guy tests commercials for a living so I guess he never came across a Merc van with the side pipe eh?

My MOT man is ok with my pipes as they exit just in front of the rear wheels. He did make me lengthen them so he could see the tip from above just to make sure he was happy about the gasses getting away clean at a standstill.

The pipes I race with are basically just two 45 degree bends stuck on the main pipes as I take the Chevy Mufflers off for racing.
I only did this to reduce the risk of the cabin filling with smoke as it has done on the last two occasions I melted some pistons.

I do know you that most testers wont be happy if the tip of the pipe is under the car.

mgbv8 · Post by **mgbv8** » Mon Mar 17, 2008 5:12 pm

As a P to that. Be careful about having them too far forward. Burnt ankles smart a bit:)

stu8 · Post by **stu8** » Wed Mar 19, 2008 4:41 pm

Unless Mercedes have got Carbon Monoxide sensing in the cabin which kills the engine in a miss-hap then it would appear to be legal to put them out between the front wheel and door.

http://en.wikipedia.org/wiki/Image:Merc ... 07_amk.jpg

.

mgbv8 · Post by **mgbv8** » Wed Mar 19, 2008 6:14 pm

That Merc does look rather unusual and tidy with the pipes there I think.