Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Webby the Bear on 05 May 2014, 13:16:28
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Hi ya,
Can I use water or carb cleaner (I'm thinking maybe not CC cos of the heat) in a spray bottle to find exhaust leaks kinda like how you use carb cleaner to find vacuum leaks?
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Just use your hand? Should be able to easily find hot exhaust gasses :y
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Rizla paper. ;)
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Manifold :-\
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See, problem is I have a definite exhaust blow. I've waved my hand over areas, used tissue paper etc and still cant find it. theres no black soot marks either.
So, will water or cc work? :)
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Carb cleaner finds leaks on the inlet because it gets sucked into the engine and makes a noticeable difference to the engines running.
Spraying carb cleaner onto the exhaust isn't going to work because the exhaust is blowing (and it might catch fire & destroy the car). I can't see water doing anything but turn into clouds of steam :-\
How do you know the exhaust is blowing?
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Get somebody to hold some rags over end of exhaust when engine is running,then have a look and listen to find where its blowing,if its not blowing the back pressure will stall engine.
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Thanks Andy. I was just wondering if it would blow out...kinda like a whale blowing water out if ya get me
I've listened to it and so has my teacher. I get popping whilst driving and the idle is sometimes lumpy in time with the exhaust popping.
I jammed a load of exhaust paste over the joins from cat to centre section and it drove lovely and thenstarted coming back and as my cat is aftermarket im thinking its not joining correctly.... although I ve tried loads of times to get it to seat properly.
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Did you use paste to join cat to manifold?
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Did you use paste to join cat to manifold?
no mate just rejoined it with that metal ring gasket. I thought it was just paste needed between centresection and cat
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Did you use a new gasket for cat to manifold or used old 1?
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Yeah I used the old one mate. you reckon that could be shot?
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Could well be,cant see the other joints breaking tho,only that 1
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Flexi joint :(
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Flexi joint :(
No Flexi on V6, assuming this is his 2.5 V6? :-\
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Flexi joint :(
No Flexi on V6, assuming this is his 2.5 V6? :-\
Ah was thinking of 4 pot soz :-[
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Yep, no flexi joint. I'll swap out the gasket and see what happens. I'll make sure all manifold bolts are tight too.
So for future and my own learning.... best way to look for leaks is shove a rag up the exhaust while someone holds on to it and then the leak will be obvious and spewing out i presume??? if theres no leak the engine should stall? How long should it take to stall?
Ps, i can get that gasket off the cat on the omega at school. but are new ones dealer only? i jolly well cant find them on the net??
pps, exhaust paste on the flange of the cat to manifold connection.... 2 things:
1. does it matter if the paste gets on the gasket? might be awkward trying to avoid it
2. positioning the downpipe is quite difficult. the paste sets quite quickly. does that matter?
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Don't block the exhaust for long and don't rev it when blocked, as you could quickly turn a slight blow into a big hole... Never pretty :D
Check it when properly cold, and before starting, liberally coat all the joints/seams with soapy water. That way when you block the exhaust it should give you bubbles at the point of leaks.
With a cold exhaust the leaks will be more apparent as they tend to dissappear as the exhaust heats up and gaps close :y
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Don't block the exhaust for long and don't rev it when blocked, as you could quickly turn a slight blow into a big hole... Never pretty :D
Check it when properly cold, and before starting, liberally coat all the joints/seams with soapy water. That way when you block the exhaust it should give you bubbles at the point of leaks.
With a cold exhaust the leaks will be more apparent as they tend to dissappear as the exhaust heats up and gaps close :y
EXACTLY what i was thinking Al. i'll do that cheers mate