crank case breather hose

[advinnie]

Hi all just wondering will it be ok to connect the crank case breather hose up the the air filter on a blow through turbo system or will the ojl mist damage the turbo?
Cheers all

[petew]

The oil mist won't hurt the turbo, what it will do is contaminate the charge. 2 things increase the likely hood of detonation...
1. too much heat.
2. contaminants in the charge (oil specifically).

A breather box is a better idea.

[slowsixtyduece]

Could you just route it back to the oil filler? I use an alternator stand oil filler tower like Berg makes. Not quite a breather box as I'm dealing venting back into a crankcase with pressure but it's working for the moment.

[advinnie]

Does a breather box still connect to the slain filter?

[petew]

"slain filter"?

Ummm, sorry dunno what you mean.

[advinnie]

Ha ha ha that's what drink does to you.
believe or not it was supposed to say
does the breather box still connect to the air filter?

[petew]

Best not. Best if it just vents to the atmosphere. This is what I've done with mine...



You can see the filler/breather box on the RHS of the alternator. The breather on top vents fumes to the atmosphere and keeps oil vapor out of my charge.

[advinnie]

I've just removed my pulley and it doesn't look like the oil is coming from the crank?
I will post a photo later

[slowsixtyduece]

I've just removed my pulley and it doesn't look like the oil is coming from the crank?
I will post a photo later
Post Posted: Thu Feb 25, 2016 9:17 am

Not really sure where you are going with removing the pulley. You shouldn't have any oil coming out from the pulley. I'm sure you know this already, but just for the record, when your motor rotating assembly (cranks, rods, pistons, etc.) is spinning when your shine is running, it causes turbulence and pressure within the crank case itself. On a high performance motor, much of this turbulence and pressure is multiplied due to larger stroke, bigger Pistons, and especially higher rpm.

When this is all taking place inside your crankcase, there needs to be some way to allow the pressurized/turbulent atomized oil and air mixture to escape. This is typically done by venting specific places where this atomized oil/air hangs out like valve covers, fuel pump location, oil filler/ alt stand and so on. This is where having a breather box or some sort of place for this mixture to go comes in handy. It allows room and a place for the frothy oil mixture to settle while the engine is doing its thing and then, depending on your setup, drain back into the motor or be evacuated. This leads back to your original question: is it okay to vent this mixture back into the filter and through the turbo. As was mentioned earlier by Petew, you "can" do that but it makes a mess, contaminates the oil and may help further detonation.

Best bet is to hookup some sort of breather box/stand/tank and vent to atmosphere instead of back into the motor. Sorry if any of this was too repetitive. let us know what you end up doing.

[advinnie]

Hi all problem solved it was simple the oil leak was not coming from behind the crank pulley after all (just wasted £60 on a sand seal kit )
I have my oil return line from my turbo going into the fuel pump block of plate and it has a tiny crack in it so the oil was leaking on the front side of it out of sight on to the engine case and behind the crank pulley and collecting on the piece of tin that goes behind the pulley giving the illusion it was coming from behind the crank pulley.
Im still looking at what style of breather box to fit and I will not be fitting a breather line to the air filter

[madmike]

I picked up a Awesome return block off from JayCee's for my 1915 gonna get another for the 2276 soon ,,
well at least it wasn't a buggered up Piston

[advinnie]

Yes thank god it wasn't a duggered piston.