Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: omegadan2.2i on 19 August 2007, 14:13:33
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Started up my Omega this morning and was greeted by a horrible rattling from underneath (sounded like marbles rattling in a tin!!) >:
Quick scrabble on the floor and it sounds like it is coming from the middle section of the exhaust, near the cat. Exhaust still looks good and from what I can see.
The noise disappeared once the car was warm. I am hoping that this in not the cat!! >:(
Any ideas anyone???
Dan
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Did the car idle properly when it was cold?
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Timing chain these are, arnt they?
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Yes they are a chain
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baffles probably collapsed.i would part the centre box from cat then start it up,it will sound loud but tell you wether it is the cat or middle box.
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Timing chain these are, arnt they?
AA - I did try it again later (when cold again) and I did notice that the engine was idling higher than normal
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Yes they are a chain
If its a 2.2 petrol.....then its a belt.....cambelt kit to be fitted every 40k :y along with water pump imo :y
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Yes they are a chain
If its a 2.2 petrol.....then its a belt.....cambelt kit to be fitted every 40k :y along with water pump imo :y
As TD says, no chain, belt on 2.2's
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AA - I did try it again later (when cold again) and I did notice that the engine was idling higher than normal
The reason I asked, was it firing on all cylinders when this happened?
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AA - I did try it again later (when cold again) and I did notice that the engine was idling higher than normal
The reason I asked, was it firing on all cylinders when this happened?
Yes, firing on all cylinders, but I have noticed of late that cold starting although idle is constant, feels slightly 'lumpy'. Performance is also recently been a bit 'flat'. All breathers and DBW throttle valve clean. I was waiting to take to MDTM when he returns from holiday for him to have a look at it then this happens!!! :(
Dan
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Timing chain these are, arnt they?
Nope.
All Omega Petrols are belts, and have 40k/4yr life.
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Had another check today and got a couple of expert opinions - now 99% sure it IS the cat!!!! :( :(
This has probably been caused by driving through recent floodwaters, the water cooling the outer casing quickly hence 'crushing' the outer edge of the expanded ceramic monolith causing fracture!! :( :(
So, a couple of questions before I get it fixed:
1) Am I best to get a genuine GM replacement OR is a pattern equivalent as good (these seem to range from about £100+ VAT on the net). If the GM original is the way to go, how much are these on TC?
2) Could I use a secondhand one off a scrapper (which would save me money) or is this false economy?
3) Is the cat part of the front pipe or is it a separate bit?
Don't trust many of the 'fast fit' outlets so would rather get my own parts, and have a good mate who can fit it!
Any advice/help would be greatly received!! ;D
Thanx
Dan
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Having used an aftermarket CAT on my 2.0l last year I would recommend a genuine VX. This exhaust had made my car sound rough and not its previous quiet graceful self. The one I fitted was made by Bosal which I beleive a number of garages and parts suppliers use. Stick to genuine.