Crank case vent dripping oil

[eleblanc]

A question i ask in my turboglide install thread.

I used not to have much if not any oil drip, i had some only when the crank case cover bolts become loose.

Anyhow since the turbo install i have more oil coming out of there, anything to worry? anyway to stop this?

I've search and i couldn't find anything has to why this is open to atmosphere and what would cause oil to dripp

[lostmarbles]

Originally Posted by eleblanc

A question i ask in my turboglide install thread.

I used not to have much if not any oil drip, i had some only when the crank case cover bolts become loose.

Anyhow since the turbo install i have more oil coming out of there, anything to worry? anyway to stop this?

I've search and i couldn't find anything has to why this is open to atmosphere and what would cause oil to dripp

If it is any consolation, the breather on mine always keeps a wet-oil-film on the section of the front drive shaft that is directly below it. I can never remember a time when it didn't do this.

The only drips on the driveway are from my wife's car and that's a Nissan Pulsar that's not worth working on.

Turbo-ing will increase the blowby and thereby increase the amount of oil carried with it of course.

[eleblanc]

Yesterday i cleaned the drive shaft with degreaser, this afternoon i went for a 15-20km drive. You can cleary see on the drive shaft the oil drop, my guess is that they drop when i was going different speed therefore with wind the fell on the DS at different places.

My driveshaft was also wet but nothing like that.

[grant5127]

Originally Posted by lostmarbles

Turbo-ing will increase the blowby and thereby increase the amount of oil carried with it of course.

X2.... not good to turbo a tired engine..... turbo just adds excessive pressure and the pressure will slide past worn rings...... thus gommeth blow-by.......

[eleblanc]

Originally Posted by grant5127

X2.... not good to turbo a tired engine..... turbo just adds excessive pressure and the pressure will slide past worn rings...... thus gommeth blow-by.......

Engine has 170000km...tired?...mmm..

I may need to return this pre turbo in the air intake.

[crushers]

where did you run the vent hose?

which engine is this?

[canucksafari]

Yes, a tired engine (aka worn rings) will allow more blow-by but it is fairly common for any turboed engine - gas or diesel - to have increased blow-by. What you need is an "oil-catch-can" if you don't like the drip marks. You can buy them at performance shops or on ebay. Or you can make your own. All they are is a metal can with a series of baffels inside. Some say that steel wool inside a metal can works better than the metal baffels as the oil mist condenses on the steel wool nicely. The can needs three holes: one for an inlet, one for an outlet and one for an oil drain. If anything, it will enable you to accurately measure how much blow-by you actually have. Just google the term and you will see what I mean.

[Moe R]

I think u should rig something to catch the oil from the breather tube. If nothing else, it will give u something to measure. Not to mention less oil on the roads.

[eleblanc]

Originally Posted by crushers

where did you run the vent hose?

which engine is this?

It is the crank case steel tube of a 3B, they are steel and the outlet is right on top of the front Drive shaft.

[crushers]

okay,
what some do is stick a plastic pop bottle under the vent and don't worry about it. you have upped the pressure and are probably pressurizing the crankcase more than usual... another option is to run the vent to before the turbo and burn the excess oil like the other engines do. just cut the steel pipe and attach a rubber hose to the snub, run it to the line into the turbo and you are good to go...
personally, i wouldn't worry too much about it...

but then...

[Helomech]

[quote... another option is to run the vent to before the turbo and burn the excess oil like the other engines do. just cut the steel pipe and attach a rubber hose to the snub, run it to the line into the turbo and you are good to go...quote]

Don't you want to avoid this? I thought the vapors were somewhat corrosive once the oil gets closer to it's change interval. Then it might errode the turbo compressor. Also, it would be harder to tell if your turbo seals are leaking if you remove your intake and have a peek at the turbo inlet.

[crushers]

this is the way all the newer diesels vent the crank case gasses. the old "dump to the air" systems are strongly frowned upon.

[Helomech]

Still wondering about the gasses corrosive properties though....

[crushers]

i never heard of the corosive concern before now so i have not done any reaserch into it...

[Helomech]

Niether had I until I started reading posts on mud. I should stop re-iterating the info of others until I have done the research myself. Same theory as to why you shouldn't use waste engine oil as a corrosion preventative on/in your frame. Still gonna route my breather overboard.

[lshobie]

I think if you vent the tube between the turbo and the intake manifold then you will pressurize the vent by whatever boost you are running - so now it won't be a vent. If you run it between the airbox and the turbo intake then you put oil into the turbo - i would think that fine droplets of oil (vapour) will be harmful to the turbo - but I could be wrong.

Also, I saw some HZJ mine trucks the other day, the high timers (7000 plus hours) had the vent tubes vented to atmosphere and the pipe to the intake manifold was blockled off. The mechanic said it had something to do with excessive blow by being vented back into the engine can cause an overspeed or something - not quite sure as he was mumbling alot.

I have alot of vented gas on mine as well - I had the vent tube between the airbox and the turbo intake - but now I have an intercooler and it's going to get full of oil - so I will get a cleaner that goes midway.

[eleblanc]

I think, idealy i would need a canister/filter that would vent the air to the atmosphere and automaticly drain the oil, then i would drain it into the exhaust. Since the exhaust is pressurized the canister would need a check valve or something preventing back pressure into the crank case vent.

Or what about rerouting the tube so it goes verticaly up with a simple k&n filter at the top. Gravity would keep oil from coming out and staying in the block (well most of it), and i would still be venting to atmosphere? I think that would be a simplier solution?

http://www.performancecenter.com/K26...e+Vent+Filters

[crushers]

Originally Posted by lshobie

I think if you vent the tube between the turbo and the intake manifold then you will pressurize the vent by whatever boost you are running - so now it won't be a vent. If you run it between the airbox and the turbo intake then you put oil into the turbo - i would think that fine droplets of oil (vapour) will be harmful to the turbo - but I could be wrong.

Also, I saw some HZJ mine trucks the other day, the high timers (7000 plus hours) had the vent tubes vented to atmosphere and the pipe to the intake manifold was blockled off. The mechanic said it had something to do with excessive blow by being vented back into the engine can cause an overspeed or something - not quite sure as he was mumbling alot.

I have alot of vented gas on mine as well - I had the vent tube between the airbox and the turbo intake - but now I have an intercooler and it's going to get full of oil - so I will get a cleaner that goes midway.

no, you can not vent between the turbo and the intake manifold, you pressurize the crank case...not good. you have to go before the turbo....
as for the mine trucks being vented to the atmosphere...oh, i can not see that being accepted practice due to the high regualtions of air conditions in the mines...somebody is being a BAD boy...

[canucksafari]

I bet you the mine trucks use oil-catch-cans and then vent to the air intake. Here are some links which might help:

http://www.optionimports.com/oilcatchcan.html

http://www.outerlimits4x4.com/phpBB2...ight=oil+catch

http://www.outerlimits4x4.com/phpBB2...ight=oil+catch

[eleblanc]

I stoped at a diesel performance shop this morning and i had a good and interesting conversation with the owner of the place. First he recommand a catch can, not to reroute tube before turbo. So i'll get a catch can with a level tube and got this installed. I ask what would be excessive oil drop from the vent and he told me, if your truck ever runs idle and you can see smoke and oil dripping then you have a problem, a few drip once in a while is normal and nothing to worry about.

He also mentionned that since my motor runs a 20:1 compression ratio (if i recall that is the number) going higher then 10psi of boost would not be good for the engine.

and just like tapage repeatedly told me, increase fuel, it is better to run rich then lean. Rich will grease the turbo blades and will protect it from high temperature.

[lshobie]

Lots of catch cans on ebay.

http://search.ebay.com/oil-catch-can...mZR40QQfrtsZ50

[eleblanc]

Originally Posted by lshobie

Lots of catch cans on ebay.

http://search.ebay.com/oil-catch-can...mZR40QQfrtsZ50

I know, but i'm trying to find something closer, so that i don't wait 2-3 weeks for it.

[crushers]

really?? rich will "grease" the blades, eh...

[crushers]

Originally Posted by eleblanc

I know, but i'm trying to find something closer, so that i don't wait 2-3 weeks for it.

shit, use a soup can...

[lshobie]

Exactly, a soup can would do. Very easy to make, fabbing one today about of stainless and steel wool, will show a picture later.

[eleblanc]

Originally Posted by crushers

really?? rich will "grease" the blades, eh...

Basicly he said, if its smoking its coating the blades...
I told him i wasn't smoking at all, he ask me, "is your inside tail pipe black?", i said yep...

[mac]

and just like tapage repeatedly told me, increase fuel, it is better to run rich then lean. Rich will grease the turbo blades and will protect it from high temperature.[/quote]


Do some searching on increasing your fuel flow. It results in higher combustion temps and you better be careful with that on a 3B- it has nothing to do with "greasing your turbo blades". Whatever Tapage said- I don't think it would have been that. You won't hurt it leaving the fuel as is- but you can do some wicked damage by increasing w/out monitioring.