Case breather on /6, Something else I'm going to need to understand Options

[PanelBilly]

What's the best way to vent the case on the 3.0? I know there's a pipe coming out of the top of the engine, but what should I be connecting it to?

[Mike D.]

It connects via an "expensive" hose to your oil tank; there is a connection pipe next to the fill spout.

[PanelBilly]

It connects via an "expensive" hose to your oil tank; there is a connection pipe next to the fill spout.

Yet another thing to buy oh boy!

[Downunderman]

You will find that if you just put hose on it and secure it with a hose clamp it will leak and drive you crazy because when the hose clamp is tightened it will distort the pot metal spout.

Its best to machine up an aluminium extension and glue to the spout with high temp epoxy and connect the hose to that.

Cheers,

[Luke M]

The engine vents to the oil tank then there's another hose that comes off the filler neck that goes to the factory air cleaner (circled in red). If you are not using the factory air cleaner then you need to vent it to an aftermarket breather tank.
I posted pics of my factory 6 oil line arrangement. Yes, the fabric line is not cheap.

[MJHanna]

You can run it to a catch can/breather also.

[JmuRiz]

The engine vents to the oil tank then there's another hose that comes off the filler neck that goes to the factory air cleaner (circled in red). If you are not using the factory air cleaner then you need to vent it to an aftermarket breather tank.
I posted pics of my factory 6 oil line arrangement. Yes, the fabric line is not cheap.

So the line that comes off the oil tank filler neck is the one that goes to the airbox?

I want to make sure I have mine setup correctly...not that it'll be done anytime soon.

[screenguy914]

You can run it to a catch can/breather also.

Yes. A catch can between the oil filler line and engine intake is suggested. Some attempt a catch can directly from the engine, but oil velocity is highest here and a catch can will fill much faster. The oil tank is a better transition path. Do not attempt to seal this path as some have tried. Crankcase blowby must be vented otherwise oil leaks will develop.

After the catch can, some vent to atmosphere via a small, filtered breather cap, but suggest gas fumes recirculate back to the intake. Early 911 engines are dirty enough through the exhaust. No need to donate add'l unburned gas fumes to the atmosphere.

Sherwood

[SirAndy]

The case vent goes straight to the oil tank:

(IMG:http://www.914world.com/bbs2/uploads/post-179-1202450158_thumb.jpg)

(IMG:http://www.914world.com/bbs2/uploads/post-179-1202450792_thumb.jpg)



The filler neck vent goes to the air filter or a catch can, depending on your intake system.

(IMG:http://www.914world.com/bbs2/uploads/post-179-1255294222.jpg)


(IMG:style_emoticons/default/piratenanner.gif)

['73-914kid]

You will find that if you just put hose on it and secure it with a hose clamp it will leak and drive you crazy because when the hose clamp is tightened it will distort the pot metal spout.

Its best to machine up an aluminium extension and glue to the spout with high temp epoxy and connect the hose to that.

Cheers,

(IMG:style_emoticons/default/beerchug.gif)
Ive been fighting an oil leak at the hose for a year now, been through different hose material, different hose clamps, even put some dirko on the hose.. and the damn thing refuses to seal. This sounds easy enough to make.

[patssle]

You can get colored heater hose cheap on ebay. This is what I'm using engine to oil tank. Then tank into a Gatorade bottle like Andy.

http://www.ebay.com/itm/HEATER-HOSE-1-ID-R...=item2ede5cf6e0

[SirAndy]

You can get colored heater hose cheap on ebay.

Just make sure that whatever you're using is oil resistant ...
(IMG:style_emoticons/default/shades.gif)

[PanelBilly]

Originally I was just planning to clamp the breather on to the neck where you add oil, but now should I be putting
some kind of a catch bottle between the neck and the breather?

[jd74914]

Yes, I would run it to the intake or a catch can. With just a filter there you might get oil on everything.

[johnhora]

914-6 GT used this...

http://www.pbase.com/9146gt/oil_overflow_bottle_bracket

Thanks Armando

[Jeffs9146]

Here is mine! (IMG:style_emoticons/default/shades.gif)

[patssle]

You can get colored heater hose cheap on ebay.

Just make sure that whatever you're using is oil resistant ...
(IMG:style_emoticons/default/shades.gif)

Interesting - what will oil do....seep through or eat away at it?

[t collins]

I wouldn't say it's the best way but has worked well for me so far

[rgalla9146]

Leakage at the breather nipple on the engine should not be a problem.
Start with a new hose. And a narrow hose clamp, not a big beefy thing from a radiator hose. Push the hose fully onto the nipple till it bottoms.
Install the hose clamp at the end of the hose, but..... fully on the hose.
The clamp must be below the steel ball that is cast into the nipple.
See attached photo.
Leakage comes from old hard hose that has had the clamp incorrectly tightened on top of the ball.
The nipple should have had a conventional rim rather than the troublesome ball.

[SirAndy]

You can get colored heater hose cheap on ebay.

Just make sure that whatever you're using is oil resistant ...
(IMG:style_emoticons/default/shades.gif)

Interesting - what will oil do....seep through or eat away at it?

If the hose material is not oil resistant, it can break down and you end up with contaminant in your oil. Not good ...
(IMG:style_emoticons/default/shades.gif)

Also, with regards to the catch can, i drilled a few vent holes in the top of my bottle so vapors can escape.
Which is also the reason why i placed it right next to the air filter. The holes point straight towards the intake filter and any vapors will be sucked in and burnt.

I usually clean out the catch can every other month or so, it does collect some sludge on the bottom over time.
(IMG:style_emoticons/default/FERG.gif)