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Author Topic: Exhaust manifold to downpipe nuts.  (Read 1250 times)

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neil74

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Exhaust manifold to downpipe nuts.
« 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.
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mandula

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Re: Exhaust manifold to downpipe nuts.
« Reply #1 on: 12 July 2017, 14:08:36 »

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

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Re: Exhaust manifold to downpipe nuts.
« Reply #2 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
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Doctor Gollum

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Re: Exhaust manifold to downpipe nuts.
« Reply #3 on: 12 July 2017, 15:55:04 »

16mm iirc :-\
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neil74

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Re: Exhaust manifold to downpipe nuts.
« Reply #4 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.
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Doctor Gollum

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Re: Exhaust manifold to downpipe nuts.
« Reply #5 on: 13 July 2017, 08:10:10 »

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 ;)
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