Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: venom on 30 April 2011, 23:19:23
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I'm replacing the cats on my 2.5 V6 tomorrow, now I got all the fixings & gaskets from VX but when I've looked at the join on the manifolds/cats it looks like it's a stud on the manifold & just a nut on the cat side but I've been given just bolts from VX no nuts ?
So whats the right combo to fix it up 1: Stud in manifold & nut cat side or 2: VX bolt through cat side & threads into the manifold, one of them is wrong but don't know what one as the more I go through the car it looks like it was maintained by KIRB SIDE GARAGE & sold by BODGE IT & FLOG IT car sales :)
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Every CAT I have removed which is a few, you will undo two nuts on each CAT leaving a stud in the exhaust manifold. Hope that makes sense. :y
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Every CAT I have removed which is a few, you will undo two nuts on each CAT leaving a stud in the exhaust manifold. Hope that makes sense. :y
Yes mate I was just wondering why VX gave me bolts instead of nuts :o as they had to order all the bits in, so they will get them back Tuesday, cheers Daz :y
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When I have done it (only twice tbh) the studs have sheared off, and I had to drill them out and fit a bolt and nut. :(
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When I have done it (only twice tbh) the studs have sheared off, and I had to drill them out and fit a bolt and nut. :(
That's what I'm afraid of, can you drill them out in situ or do you need to remove the manifolds
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Good soak in "Plusgas" couple of longish extensions on the end of a torque wrench. Make the nuts fly off :y
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I did them in situ with just the fron of the car up on ramps, but it was hard work. Especially on the arms. ;)
Got through quite a few drill bits as well. ::)
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I did them in situ with just the fron of the car up on ramps, but it was hard work. Especially on the arms. ;)
Got through quite a few drill bits as well. ::)
Surprised you didn`t try a 3/8" ratchet ;D ;D ;D ;D
OP, if you have to drill the studs out you need cobalt drill bits
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Good soak in "Plusgas" couple of longish extensions on the end of a torque wrench. Make the nuts fly off :y
Cheers Rob soaking as we speak :y
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I must have been lucky then as I haven't had one break yet :-?
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Good soak in "Plusgas" couple of longish extensions on the end of a torque wrench. Make the nuts fly off :y
Cheers Rob soaking as we speak :y
Let`s hope yours undo as easy as mine did Ken :y
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I did them in situ with just the fron of the car up on ramps, but it was hard work. Especially on the arms. ;)
Got through quite a few drill bits as well. ::)
Cheers Albs :y
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Mind you knowing Stan Laurel he probably tightened the bloody things up ;D ;D ;D ;D
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IIRC the early Omega had bolts into the manifold but I can't remember what year they were changed to nuts . The cat end is will more than likely need drilling and nuts and bolts using.
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Never had a bolt snap while taking cat nuts off (2 nuts per cat) although regularly need a breaker bar...generally 16mm nuts (unless some muppet has put the wrong ones on when changing the cats) which is handy as you can use a size 10 spark plug socket which happens to be an extended 16mm, perfect for the job...a little awkward to get up to the nuts and will need a couple of extension bars to get the job sorted
As for the exhaust end of the cats, the bolt should bolt through the exhaust directly into the cat...obviously on many older cats the hole and/or thread has rusted away so you will find the bolt secured by a nut...13mm that end
Dont forget to unplug the wire into the lambda sensor before dropping the cat down
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I have just taken both cats off the breaker. On each one I had one nut which came off ok, and the other one sheared, so will need drilling out to take a nut and bolt.
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I have just taken both cats off the breaker. On each one I had one nut which came off ok, and the other one sheared, so will need drilling out to take a nut and bolt.
Your doing something wrong Stanley ;D :P
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I have just taken both cats off the breaker. On each one I had one nut which came off ok, and the other one sheared, so will need drilling out to take a nut and bolt.
That`s bloody typical of you ;D ;D ;D
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Well got them on today, passenger side the 2 nuts came off no probs, drivers side not to bad 1 nut no probs but in the past someone has had to do some work which is either replaced the cats before or removed for something else but had snapped the inner stud about half way up the thread so used a bolt to fill in which is what I've done as well as didn't want to temp fate & cause more work drilling it out as I need the car back on the road & when we've not so much on I'll do it properly :y
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I have just taken both cats off the breaker. On each one I had one nut which came off ok, and the other one sheared, so will need drilling out to take a nut and bolt.
That`s bloody typical of you ;D ;D ;D
Soaked in plus gas several times over the last few days.
Dont know what else I could have done tbh. :-/