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Will small exhaust leak effect emmissions?
-matt - 22/11/11 at 07:52 PM

Been filling in some pin holes in the welds in my manifold that i made.

Just wondering, if i miss a couple, will this effect the emissions much?

There is no lamda sensor to corrupt. And manifold will be heat wrapped if that makes any difference.


So would a tiny leak cause me to fail the emmissions test? or do i need to make sure i fill them all?

Im not too worried about the exhaust long term, as planning to get something custom made after IVA.

Cheers


Paul (Notts) - 22/11/11 at 08:00 PM

What engine and what level of emmissions test will it have to pass?


-matt - 22/11/11 at 08:27 PM

Its a 2008 R1. Not sure what the emissons level are?


MakeEverything - 22/11/11 at 08:28 PM

quote:
Originally posted by -matt
Been filling in some pin holes in the welds in my manifold that i made.

Just wondering, if i miss a couple, will this effect the emissions much?

There is no lamda sensor to corrupt. And manifold will be heat wrapped if that makes any difference.


So would a tiny leak cause me to fail the emmissions test? or do i need to make sure i fill them all?

Im not too worried about the exhaust long term, as planning to get something custom made after IVA.

Cheers


Shouldn't make a difference.


britishtrident - 22/11/11 at 08:38 PM

Exhaust assembly paste ( FireGum or similar) will seal it until it carbons up.


-matt - 22/11/11 at 08:47 PM

Thats what ive been using (the ceramic type that comes in a tube for a gun).

I also need to use some around the flange that goes into the head, as thats leaking slightly.

Just wondering for if i miss any leaks.


ReMan - 22/11/11 at 09:43 PM

quote:
Originally posted by britishtrident
Exhaust assembly paste ( FireGum or similar) will seal it until it carbons up.


I'm not convinced they "carbon up " any more since the good bits wrer taken out of petrol?


r1_pete - 22/11/11 at 09:48 PM

Persevere and weld them all up, nothing else is permanent.


rusty nuts - 23/11/11 at 06:35 PM

Even a small exhaust leak on a car with cat and Lambda sensor can cause the Lambda reading to be too high for MOT purposes


-matt - 24/11/11 at 12:27 AM

Even if there is no lambda/02 sensor?


rusty nuts - 24/11/11 at 09:34 PM

That may depend on what your emmision limits are ? If you have an age related plate you may have a lower limit than a Q plate


bertie_bas205 - 24/11/11 at 10:18 PM

It wont effect the emmisions but surely the system has to be "gas tight" to save nasties getting into the car......?





Bertie.