bud-weis

i'm gonna fit a bailey breather kit to the saff this week as part of it's slow rise from stage 0.5 to stage 3 , was wondering if people have their kit's connected to the top of the cam cover or not and what the pro's and cons are .
my local cossie expert fits them to the cam cover but i suspect this is cos he worked on the old rs500 touring cars and it's what suited them.

opinions please people

Anonymous

It allow's air flow - Oil doesn't come out of it usually.

IMage a can - stella comes out of it slow - you piece it at the top and it comes out fast.

Anonymous

Weird one this, you seem massive power engines both with and without it, seems to work either way.

I guess when it comes to breathing it doesnt matter as much where the holes actually are so long as they are big enough and there is enough of them.
Most modern engines have cam cover breathers though and ive heard of a few engines have problems without them in terms of blowing the camshaft end seals, not seen it on a YB personally though.

Id say have it, as i cant see a downside to it personally.

Beach

Ive heard people say ''Oil will come out'' Ive seen lots with the breathers on there so cant see it causing problems and the bailey kit comes with an alloy spigot to fit onto the rocker cover anyway

Anonymous

Oil will come out, along with pressurised air, thats fine though providing you seperate it and dump the oil back into the sump so you arent losing it.

Ryan

chip i seem to remember mike saying there was a downside to cam cover breathers, something to do with oil flow. maybe this was on high HP engines.

cant 100% remember.

But as you say there's high HP engine with both, so i guess its down to preference

rsnissan

iTrader: (9)

i think was on about engines with a raised rev limit IIRC

Ryan

ahh yes maybe that was it.

Its still early my brain isnt functioning properly.

only just got up

Anonymous

Ive seen 9Krpm engines running cam cover breathers successfully

Graceland

i need to return mine to the sump

Anonymous

BTW its a crank breather and has nothing to do with the head LOL....

Mine has it and uses no oil on full chat....

Anonymous

The cam cover breather has nothing to do with the head?

Explain what you mean mate, cause im lost by that!

Anonymous

Where is it breathing from then chip ?

Anonymous

From the cam cover on the top of the head, although obvioulsy all the pressure is linked back to the crankcase via the oil galleries.

Think posisbly we are (inadvertently) playing with semantics here?

Ie you are saying that because the head (cam cover) gets pressurised by the pressure from the crank case that its crank case pressure you are breathing?

If so, i agree completely its all pressure originating from the crankcase and thats what you want rid of (from more or less wherever you can lose it IMHO).

Anonymous

i didn't know that there was a route from the head its self - thought it was a tunnel from the top of the crank case to the exit of the cam cover.

So its just like a long pipe.

3drstretch

iTrader: (1)

I think you will find chipster that the breather hole at back of cossie engine is a direct tube inside engine to the crank.So even though the cam cover is drilled it is actually breathing from the crankcase. And Obviously from the valve guides as well

Circled in pic below.

Anonymous

But that tube isnt sealed off from the rest of the cam cover?

Not on ones ive seen done anyway, its just tapped into the cam cover itself.

3drstretch

iTrader: (1)

It is sealed off from cam cover when it is in place.

Look at pic i've posted above

Stu @ M Developments

iTrader: (12)

Actually chaps, engines breath from the valve guides too so it IS to do with the head in a small way

3drstretch

iTrader: (1)

Shut up stu wot do you know. And if you look stu i wrote that as well.


Joke for everyone that thinks i'm having a go.

Anonymous

Ah, see what you mean from that pic, cheers

Matt

the underside of a yb cam cover....

Anonymous

LOL @ Guides - sealed by the rocker cover gasket and the head gasket - how does this work then stu ?

Anonymous

He means that combustion chamber pressure makes it into the head past the valve guides (especially when your valves themselves arent sealing due to being not lapped in but even before that as valves are opened at points in the cyle there is pressure in the chamber).

This then pressurises the cam case, which in turn (via the oil feeds to it from the crank) adds to the crank case pressure issue.

Anonymous

I get that dude - but what has this got to do with the breather in the cam cover LOL....

Anonymous

Because its all linked via the oilways into the head?

Although i think Stu was just mainly pointing out what a clever cunt he is who looks at the whole picture more than the rest of us

Stu @ M Developments

iTrader: (12)

Steve, please dont suggest the oil gets to the valvetrain "all on its own" and doesnt even have a drain back to the sump...

Take a look at the head where that cover port joins up to and see what happens to it below cam cover sealing face please and you will then understand what it has to do with your topic.

As for it doesnt work... 1700 miles, hundreds of ŁŁ of fuel, 21 laps of the nurburgring mnany hours of 100mph + rushing through germany and belgium to make the tunnel in time... result =

0.25litres of oil used to top up from 3/4 full back to full on the Sunday afternoon after allready doing 17 laps as MANY people will confirm , as people appeared to be surprised that it was ALWAYS completely full...

So, it seems to work ok for me, but that said, with more rpm you do run into different problems with sheer volume of oil thrown around, especially in the valve train area... but thats another story.

Turbosystems

iTrader: (5)

the cams are also a very good kenwood mixer and blender

DaveEscos

oi! thats my bloody engine! Hippy!

3drstretch

iTrader: (1)

Yeh AND wot you gonna do about it Chubbs.

DaveEscos

if breathing from the cam cover is so crap..

why did the touring car rs500's do it????

as can be seen in one of the millions of photos by martinlabattstouringcarrs500 blah blah






stretch... a slap.. thats what.. a nice dry one!

Turbosystems

iTrader: (5)

dave escos the touring car engines did not actually breath off the rocker cover in that sense ,the head was modified by the instalation of a stack tube making the oil return in the head a gas transfer port ,the rear of the head was modified and a seprate external pipe returned oil back to the sump above oil level.

Hope this helps

3drstretch

iTrader: (1)

Oooooooooh Cant wait you kinky devil.

DaveEscos

thanks tony, that is interesting and makes sense


ok.. so poxy cam over taps are crap! rofl

bud-weis

keep going guys more opinions and views, and maybe arguments

so in the bailey kit i will have the fittings to have a port off the cam cover?
where will the pipes go if this isn't used? forgive my ignorance but haven't even looked at the cossie breather system so i know naff all about it.

thanks

Anonymous

If you dont put the pipe to there you have two choices:
put it somewhere else
block it off

both are fine

bud-weis

can i put it down my missus' throat........the pipe that is

Dave Henshall

here you go mate

probably the least messy of installs (i mean messy as cutting and drilling holes in expensive stuff ... )

https://passionford.com/forum/viewtopic.php?t=103270

bud-weis

thanks mate that helps, but still a bit unsure about a return to sump? mines 2wd

guess i'll have to just get stuck in,normally works

Chris Honeywell

Well mine breaths from the cam cover,
does a nice job along with my 2nd hand Cometic head gasket
and slapped together in my garage engine...


2years 10k miles and still counting