Blow Bye tube hooked to exhaust?

[ata]

I didn't read all the post on this thread so if this has been said DUMB me. I don't know if you have seen the inside of the intake manifold on a 6. 2 chev diesel. But they run the blow-by tube into the intake manifold along with (EGR) exhaust and it makes a black and sticky mess. So if you ran your blow-by tube into your exhaust with all the soot and add oil to it. That would be a mess I would not like to have.

 

[1stgen4evr]

Wouldn't putting the crankase under vacuum now increase this problem?



Well yes, but- - -





I am not promoting the idea or dissing either. But it just might work well if done right. The amount of vacuum would only need to be very very slight. So if you plumbed from the upper point of the blow by tube and ran back to the end of the exhaust, downhill would be working on your behalf. Then drop into the exhaust near the end so that, should it be required, the crud could be easily scraped out.



Perhaps the exhaust can be left out of the loop altogether if a venturi in the slipstream at the back (under the bumper) simply sent the droplets onto the tailgaters windshield behind you. This might not work since in my experience, any oil drip shows up on my tailgate. It would have to be fine tuned.



James

 

[dpuckett]

What would be the effect of a catch canister on the vent tube?

Another thing to empty at oil changes. :-laf:



What about the Walker Airsep that used to be advertised in the TDR magazine? I know they are kinda pricey, and not sure how they are set up, but the ad looked good



OR.....



You could set up something to catch the oil, then let it breathe (i. e. sock or other filter-type media), then drain back to the crankcase. Those engines apporaching 500K (like my 90, supposedly) could cut oil consumption in half. I know the 3rd Gens have something like this in teir ccv system.



Daniel

 

[AKimmel]

I don't know if this is possible, but could the breather tube be turned around and aimed up with a small filter (K&N) so that it would breath and the excess oil would run back into the engine. I've never really examined how or where the breather tube is breathing from, so hopefully somebody else does.

 

[1stgen4evr]

AKimmel



The way the tube comes off the side cover (straight down), it would not be posssible. The idea certainly has merit and could be accomplished with a tad more modification.



James

 

[fmj]

I thought about the exhaust method when I first got my truck and experienced the oil mess, but at that time it was not recommended by anyone on here. So I went another way. In my excess parts box from sandrails I had a baffled breather, about 6 inches long, with two AN holes in side and one on bottom, and a K&N breather filter on top with a cover. These were used as a crankcase breather on our sand cars and to keep sand out. This breather fit on my '01 right between the battery box and the window washer fluid tank and it's easy to make an alumnium bracket to attach to the battery box. I plugged one of the side holes and used the other one for the crank tube from the breather on my engine. I made sure that the tube went at a downward angle, so no oil flowback into engine. The bottom hole is used as a drain. I have a clear plastic hose that is about a foot and a half long with a t fitting on it. When I see oil in the line I drain it. The tube goes straight down and you can see it easily from under by front tire. Over 100K, no oil no leaks. If anyone is interested I'll take take some pictures. I know the off road shops sell these breathers. Just another view.

 

[keimmmo]

Running a long line to the back of the vehicle has the problem that moisture and oil tend to settle into the low points and effectively plug the line. The line would have to be run with NO low spots... just a long slight downhill angle... virtually impossible.



You will get better velocity due to the heat of the exhaust nearer the motor. I would keep the vacuum tube as near the turbo as possible.



The crud inside the 6. 2 intake is because it is not BURNT in the intake! The heat inside the exhaust will burn any oil and vaporize any water. I run used motor oil through my trucks by the barrel and I do not have any trouble with the exhaust carboning up. The quantity of oil coming out of the breather tube would be minimal by comparrison!!!



Steve Keim

 

[wcjp]

Here's what comes from the factory on my 06' to combat blowby.







#ad




#ad