Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: feeutfo on 03 April 2010, 17:06:13
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breather box behind drivers side bank, small pipe totally clean, brass nozel is totally clean still shiney brass coloured, no sign of oil, fit pipe to nozel and blow/suck from plenum end and its solid, no air in or out, same with engine running.
Seems blocked to me, whats in there? anyone know?
i've poked a paper clip down the 1mill hole, it goes in about an inch but stops, something solid but springy in the way. Is there a reed valve or sumat in there?
Large pipe is clear, can blow through it no problem, block the end and can feel the pressure build up and release with engine running. Not on the small pipe.
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breather box behind drivers side bank, small pipe totally clean, brass nozel is totally clean still shiney brass coloured, no sign of oil, fit pipe to nozel and blow/suck from plenum end and its solid, no air in or out, same with engine running.
Seems blocked to me, whats in there? anyone know?
i've poked a paper clip down the 1mill hole, it goes in about an inch but stops, something solid but springy in the way. Is there a reed valve or sumat in there?
Large pipe is clear, can blow through it no problem, block the end and can feel the pressure build up and release with engine running. Not on the small pipe.
steel mesh
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breather box behind drivers side bank, small pipe totally clean, brass nozel is totally clean still shiney brass coloured, no sign of oil, fit pipe to nozel and blow/suck from plenum end and its solid, no air in or out, same with engine running.
Seems blocked to me, whats in there? anyone know?
i've poked a paper clip down the 1mill hole, it goes in about an inch but stops, something solid but springy in the way. Is there a reed valve or sumat in there?
Large pipe is clear, can blow through it no problem, block the end and can feel the pressure build up and release with engine running. Not on the small pipe.
steel mesh
what size pokey thing would/should go through it do you reckon?
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breather box behind drivers side bank, small pipe totally clean, brass nozel is totally clean still shiney brass coloured, no sign of oil, fit pipe to nozel and blow/suck from plenum end and its solid, no air in or out, same with engine running.
Seems blocked to me, whats in there? anyone know?
i've poked a paper clip down the 1mill hole, it goes in about an inch but stops, something solid but springy in the way. Is there a reed valve or sumat in there?
Large pipe is clear, can blow through it no problem, block the end and can feel the pressure build up and release with engine running. Not on the small pipe.
As long as you do an oil change very soon after, you can squirt some carb cleaner down it using a fine nozzle. I had to do that on the old 2.5 .. :( It took a few goes but eventually cleared... fair bit of cleaner went in :( .. once I'd finished the breathers and reasssembled I ran the engine at idle until warm then changed the oil ...
AFAIK that does no harm
HTH
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Is it possible to remove the breather box with the engine in situ ? :-/
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Is it possible to remove the breather box with the engine in situ ? :-/
i loked at it with the cam cover off, suspect it will come off, but did not fancy guaranteeing it would go back oil tight as its got sealent all round joining it to the block.
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tried poking it, carb cleaner not keen to go in as the air cant get out at the same time, plus i've put a load of lpg bellox in the way.
Theres a funny noise as well, coming from cats area, like a biuld up of pressure being released every 20 secs, its too low to be cam covers though, sounds a bit like power steering on full lock for second, except pas is not moving as its on the drive ticking over....
never gave it much thought before, but why have 2 breather outlets from the crank case? The bigger pipe is currently doing the job afaict.
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The larger breathers go upstream of the throttle and create a slight negative pressure in the crank case on full load (as there will be a slight pressure drop in the intake ducting).
The smaller breather goes downstream of the throttle and does the same job when the engine is under light load (there'll be negative pressure in the intake manifold due to the restrictive throttle).
So, both are required for the engine to breathe under all conditions but it won't start popping cam cover gaskets unless both block.
I would squirt a load of carb cleaner down that tube and then perhaps some compressed air after it to try and blast it through.
Carb cleaner won't contaminate the oil. It will evaporate at room temperature within a few seconds.
Kevin
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The larger breathers go upstream of the throttle and create a slight negative pressure in the crank case on full load (as there will be a slight pressure drop in the intake ducting).
The smaller breather goes downstream of the throttle and does the same job when the engine is under light load (there'll be negative pressure in the intake manifold due to the restrictive throttle).
So, both are required for the engine to breathe under all conditions but it won't start popping cam cover gaskets unless both block.
I would squirt a load of carb cleaner down that tube and then perhaps some compressed air after it to try and blast it through.
Carb cleaner won't contaminate the oil. It will evaporate at room temperature within a few seconds.
Kevin
Agreed .. but the crap it has moved, and there might be a fair bit of it, will still be there, ok, the filter should collect it .. but for the sake of an oil change ... :)
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The larger breathers go upstream of the throttle and create a slight negative pressure in the crank case on full load (as there will be a slight pressure drop in the intake ducting).
The smaller breather goes downstream of the throttle and does the same job when the engine is under light load (there'll be negative pressure in the intake manifold due to the restrictive throttle).
So, both are required for the engine to breathe under all conditions but it won't start popping cam cover gaskets unless both block.
I would squirt a load of carb cleaner down that tube and then perhaps some compressed air after it to try and blast it through.
Carb cleaner won't contaminate the oil. It will evaporate at room temperature within a few seconds.
Kevin
Agreed .. but the crap it has moved, and there might be a fair bit of it, will still be there, ok, the filter should collect it .. but for the sake of an oil change ... :)
all good points, thanks guys.
Did exactly as Kevin suggested filled the pipe with carb cleaner and then air line on the end to force it through, it just blew the pipe off. Its well blocked.
:-/
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thought smaller one had some kind of diagphram?
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thought smaller one had some kind of diagphram?
:-/ spoke to a member a while back said it was a reed valve, but poking a paperclip down the 1mill hole and feeling the surface, (if thats possible), it did feel like a mesh type surface, difficult to say for certain though.
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Did you ever get this sorted Chris - as just about to do mine :-[
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Cud this be the cause of misfiring/stuttering/rough running :-/
My car labours thru the gears & is more like a 1.0ltr than a 2.5 :'(
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Did you ever get this sorted Chris - as just about to do mine :-[
nah, gave up with it in the end, and have since found another members 3.2 the same, small breathers solid, large breathers clear. Although his inlet manifold and wedge where alot blacker with oil film than mine is, mine are shiny and new in comparison.
I had an idea to get a syringe with a needle and inject some brake cleaner or carb cleaner in there through the small hole.
Or drill the hole out a mill or so, but it will drop swarf in the engine, and i've no idea what affect a bigger hole will have.
I cant see how blocked breathers will cause rough running tbh, but i'm certainly up for being corrected...?
:-[
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Chris it isn't too hard to remove the breatherbox, four bolts :y
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Chris it isn't too hard to remove the breatherbox, four bolts :y
have you been in there Daz? what's the set up inside dou you know?