cossirob

will an escort oil breather be ok on a fiesta rs turbo? as from the pictures iv seen of the two they look different to eachother as i have an escort one on my fiesta engine.

also have i got it set up right on my fiesta rst engine,the breather has 4outlets 3 at the top of the breather and 1 at the bottom. iv got both my crank case outlets goin to the top of the breathe and a little filter on the 3rd outlet on the breather and the botton going to the block is that ok?

cossirob

anyone?

paul brace

Run the bottom outlet (oil return) to the sump below the oil level, you'll need a fitting for your sump. Should stop any blow back and do the trick.

Dennis_Wiseman

iTrader: (1)

A lot of people say run the breather return below oil level but how can it drain away when the sump is always full of oil? Its just going to back up your breather return

James @ M Developments.

iTrader: (2)

That would really only ever become an issue if the breather tank was mounted at sump level, or the engine was filled to the rocker cover with oil

Returning below oil level stops the return line seeing any crank case presure, so the oil CAN return all the time.
In some cases if the return is above oil level it will act as a breather, and this can stop oil from returning to the sump as you have crank case pressure venting through the return line.

Dennis_Wiseman

iTrader: (1)

Just thinking on the lines of physics, how can a fluid return to a area if the area its meant to be dumping into is already full? Is it basically pressure that kind of, for want of a better word, sucks the oil away from the pipe?

I'm just imagining a bucket of water with a hose stuck in. If the hose is under water level and you fill the hose up, it will just back up the hose rather than fill the bucket.

JamesH

iTrader: (21)

I was told to use a one way valve

Dennis_Wiseman

iTrader: (1)

Ah i think i get it now lol

The pressure going into the breather at one end forces the oil out the drain return pipe?

Is this right?

Diesel combi pete

I would have thought the two levels that in breather pipe and that in sump would both drop to the same level, niether side will hold pressure on its own.
Cheers Pete

Diesel combi pete

[

Returning below oil level stops the return line seeing any crank case presure, so the oil CAN return all the time.
In some cases if the return is above oil level it will act as a breather, and this can stop oil from returning to the sump as you have crank case pressure venting through the return line.[/quote]

I do not know why you say it will not fill the cranck case presure if it is belowe the oils level. ????

James @ M Developments.

iTrader: (2)

imagen holding a hose pipe to your mouth, and pouring water down it, the water will flow down the pipe into your mouth.

Now try the same but this time blow down the pipe. No water will reach your mouth,

Same scenario really, the return line is trying to let oil down it, it cant if there is crank case pressure blowing up it.

James @ M Developments.

iTrader: (2)

The return line will not act as a breather if it is below oil level.

Diesel combi pete

Thats a good one.. The water you now add to the pipe would just get to same level as that in the bucket, bucket would flow over impossible for it to back up pipe unless the bucket has air tight lid on it. Bucket would be just an extention of pipe if you were using pipe to get level as we do some times when needing two levels quite away apart. Cheers Pete

Diesel combi pete

It might not act as a breather but the pressure will press on the oil the other side in the pipe, Pete

James @ M Developments.

iTrader: (2)

The pipe is basicly at atmoshere at the other end. You might see slight pressure if it was sealed, but its not.

The issue is crank case gasses venting up the return hose.

Dennis_Wiseman

iTrader: (1)

Yeah i understand that bit mate.

Its just below level, didn't think a fluid would empty a pipe based on gravity if below level. I had visions of it backing up the pipe lol

Diesel combi pete

You definatly wont get gasses passing back up... Just oil.
Pete

James @ M Developments.

iTrader: (2)

You will get plenty of gasses venting up the return hose if it s above oil level, hence my post explaining why most try to run the return hose below oil level.

Rsmat

iTrader: (2)

James is correct as I've also done this...!

Diesel combi pete

I gause I am just lucky, I do not get enough gasses in my old combi to worry about. Pete

Rsmat

iTrader: (2)

Big difference from a fiesta turbo tho mate.

BRAM

iTrader: (1)

Another question.
Why does my breather tank keep getting what looks like mayo in it?

James @ M Developments.

iTrader: (2)

It's moisture, can be quite normal as oil will absorb moisture and as the oil temperature increases this will end up in the breather and mix with oil vapours and traces to cause this gunk, as well as just plain condensation.

I found moving my breather tank to the turbo side helped cure this as the actual breather tank got quite hot and it must have steamed the moisture out of the atmospheric port

If you start your car and get it warm, then take the tank off it will be very wet inside.

cossirob

good read lol but is there an answer to my question... will an escort rst oil breather be ok on a fiesta rst engine (efi) as the fiesta breather has a vacume pipe on them from what iv seen. cheers rob