Exhaust Problems

[Whitedog 0]

Hi All

Just a quick one. What is this at the rear of my cat (round circular thing with a big hole in it?). +o(

Do i need a new cat???

:-(

[kilokilla 0]

Hi mate if its engine side of cat its for lambda probe if its at back of cat ie tailgate end of cat its probably a cat off of a later car that has lambda before and after cat you should be able to just stick a bolt in this hole but make sure you get 1 with the right thread on it and do it up tight otherwise it will just blow it back out which im guessing is what has happened.

[Whitedog 0]

Its definately at the rear of the cat, ie tailgate end. Will it be a threaded hole then? i take it it is so it can take a sensor. just worried that there should be something there. Cant understand what you mean by it probably being of a later car as mine is a later car, 1997, therefore, shouldnt it have something there???

Cheers for your help folks, hope i make sense.

[kilokilla 0]

What i mean is it could be off of a later vw not a vr as a lot of later vws have similar cats but with lambdas before and after cat.

[spanky 0]

I had exactly the same thing in winter, when I could see the exhaust gases coming out the from under the side of my R reg '97 VR. Did just as KiloKilla mentions and not had a problem since!

[Whitedog 0]

Cheers folks, will do it the weekend when i can get it up on axle stands or something. Any idea what size thread on the bolt??? I'll probably buy a selection and then try it. Cheers again.

[spanky 0]

tbh I used exhaust paste around a snug fitting (as in snug to push into the hole) bolt so I didn't have to destroy any threads etc, then wiped the excess paste off the bolt head and it looks clean and tidy. This may sound obvious but don't use a really long bolt as you may knack your cat! Hope this helps