Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: neil74 on 12 July 2017, 13:49:15

Title: Exhaust manifold to downpipe nuts.
Post by: neil74 on 12 July 2017, 13:49:15

Here I go with a stupid question.. what size are the nuts that hold the cat pipes to the manifold?. I ask because I've tried a 14mm and its too small i've also tried a 15mm and it seems to big are they AF or some other strange size or am I being a bit daft.

Cheers
Neil.

Title: Re: Exhaust manifold to downpipe nuts.
Post by: mandula on 12 July 2017, 14:08:36

Mine was 13 mm on 2.2 petrol. Dunno is there different sizes on different motors..

Title: Re: Exhaust manifold to downpipe nuts.
Post by: omegod on 12 July 2017, 15:23:17

I seem to remember having problems with these myself several times, I think I resorted to a spark plug socket in the end

Title: Re: Exhaust manifold to downpipe nuts.
Post by: Doctor Gollum on 12 July 2017, 15:55:04

16mm iirc :-\

Title: Re: Exhaust manifold to downpipe nuts.
Post by: neil74 on 12 July 2017, 23:37:45

Well I've managed after a long tussle to change the whole exhaust just waiting on new lambdas as no matter how hard I tried I could not get the bloody things out of the old pipes.

Title: Re: Exhaust manifold to downpipe nuts.
Post by: Doctor Gollum on 13 July 2017, 08:10:10

Quote from: neil74 on 12 July 2017, 23:37:45

Well I've managed after a long tussle to change the whole exhaust just waiting on new lambdas as no matter how hard I tried I could not get the bloody things out of the old pipes.

Should have been done first...

Penetrating spray every day for a week on both the manifold/downpipes and sensors...

Then, on the day your doing the job, take the car for a hard thrash to get it nice and hot. Jack it up and then slacken everything, starting with the sensors and down pipe nuts ;)