Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Muroman on 20 May 2016, 18:59:42
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3.0 V6 MV6
~15 000km earlier done headgasket change and everything cleaned.
Have anyone ever experienced something like this??
Couple of tight turns to left with high revs and then flat out straight. Blue smoke cloud 2-3hundred meters like really very big cloud. Stopped for a look no noices but a little smoke.
Drove home just thinking about valve problems. After an hour at home I got an idea what happened and really got it right ;D So now I've been driving on normal roads and only one morning after that incident came blue smoke on start but not anymore.
The oil accumulated on the right of the engine and as pressed flat straight it came up from the breather hose to the plenum and then down on pistons. This proven by that as I look trough throttle body there's a lot of oil...
Does anyone have some idea how to get rid of this omegas way of lubricating pistons?
-Mika
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Read something that might be cause cylinder compression goes trough piston ring.... I think this need compression check just in case.
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Too much Oil?, over filled sump.
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Compressions checked, not too much oil.
-Mika
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Were you drifting it at the time?
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Were you drifting it at the time?
Well yes kinda ::)
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Nail on head Al......busted! ::)
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The oil accumulated on the right of the engine and as pressed flat straight it came up from the breather hose to the plenum and then down on pistons. This proven by that as I look trough throttle body there's a lot of oil...
Does anyone have some idea how to get rid of this omegas way of lubricating pistons?
For the road? Leave it alone.
For your track use? Baffle the breather where it joins the sump. Then run the breather into a sealed catch tank just like track cars have used for decades. Finally block off the holes in the plenum.
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Were you drifting it at the time?
Well yes kinda ::)
There you go then... oil being forced into the breather box and up into one side of the plenum and straight into the 135 bank ::)
Next time turn right ;D
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Well as on the thight corner omega drifts a little bit in high speeds so the main reason wasn't to drift ;D
Well I dont only do thight turns on track so I could change the breather style...
Does it matter how you block those plenum holes?
Can I leave the charcoal pipe there and just block the others? How the holes go in there?
-Mika
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There's somekind of flap in the breather box that is behind the other head. That Should keep the oil in the right place but they say that it worns out and thats why it lets the oil up. Opel workers said that.
I have seen the picture here somewhere how the holes go in the plenum?! Help?
-Mika
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I ended up blocking the two big breather pipes on plenum and lead the pipes to oil catch tank in front of the idler pulley. I have emptying hole at the bottom of the tank in which I connected 6mm pipe and led that under front bumper where it is easy to put a bucket under it and empty the tank.
Fuel tank fumes pipe and also the smaller breather pipe was left untouched.
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I ended up blocking the two big breather pipes on plenum and lead the pipes to oil catch tank in front of the idler pulley. I have emptying hole at the bottom of the tank in which I connected 6mm pipe and led that under front bumper where it is easy to put a bucket under it and empty the tank.
Fuel tank fumes pipe and also the smaller breather pipe was left untouched.
And you wonder why you have high rpm... ::)
This is your air leak... The breather should be closed, not open to air... ;)
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I ended up blocking the two big breather pipes on plenum and lead the pipes to oil catch tank in front of the idler pulley. I have emptying hole at the bottom of the tank in which I connected 6mm pipe and led that under front bumper where it is easy to put a bucket under it and empty the tank.
Fuel tank fumes pipe and also the smaller breather pipe was left untouched.
And you wonder why you have high rpm... ::)
This is your air leak... The breather should be closed, not open to air... ;)
Yes, indeed. You have created a leak of unmetered air into the intake.
If you want to use a catch tank, then you need to block the smaller breather pipe from the plenum in addition.
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Now I get it. the smaller breather pipe..... **** haven't thought of that....
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Now all breather pipes goes to catch tank and plenum is blocked.
Problem or not but now it is making that creamy oil into pipes that go to catch tank.... I think it is normal as it has done that before but maybe not this much. Any thoughts?
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You're going to get some of that, unfortunately.
The standard crankcase breather system keeps some movement of air through the crankcase under all driving conditions so water vapour from combustion gets purged from the engine. Even still, you can get a little mayo forming when the car is used for short trips.
With a catch tank, all that can happen is that piston blow-by gases can escape via the catch tank but there is no purging of moisture from the crankcase. Not a problem if the car does mainly long trips where everything gets nice and hot and the moisture can eventually evaporate, but it will be more prone to mayo when pottering around.
More regular oil changes might help to an extent.
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Washed the pipes to prevent getting it frozen.
Noticed also another bug with the catch tank system now ::) The smell really gets into cabin when heater on. If I continue using the car regularly trough winter I need to re-install original system or then buy wunderbaums ;D
My average oil change period is 8000km and I drive about 12000km / year. Mobil Rally Formula 5w-50. So that is probably good.
But have to say that the engine feels very smooth and it is nice to know that the engine gets only clean air. No exhaust gases and no oil fumes.
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To deal with the smell, you could try extending the outlet from the catch tank down under the car with another section of pipe. This is how I have it plumbed on my kit car.
Also check that the scuttle panel is well sealed where the two haves join and at the join between scuttle and bonnet, as the ventilation system shouldn't be drawing in air from under the bonnet.
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Could also return the breather system to stock ::)
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To deal with the smell, you could try extending the outlet from the catch tank down under the car with another section of pipe. This is how I have it plumbed on my kit car.
Also check that the scuttle panel is well sealed where the two haves join and at the join between scuttle and bonnet, as the ventilation system shouldn't be drawing in air from under the bonnet.
I'm missing those 2 seals that should be installed into bonnet, on both ends of the long seal. (I believe that the part number is 90493700) So that is one reason.
Other than that the scuttle should be good but your explanation of the joins would need a picture to get me understand ???
Could also return the breather system to stock ::)
Don't be so negative ;D
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I was thinking about where the plastic section of the scuttle meets the box where the pollen filter lives and the join between the two plastic parts here. There is normally foam to form a seal here but it's often deteriorated.
I't good to make sure this seal is sound otherwise you can get water dripping into the 2,4,6 spark plug wells on the engine.