Daza
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| posted on 19/2/08 at 11:14 PM |
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Zetec crank case breather box
Does anyone know of a source for new Zetec crank case breather boxes,,?
I dont mean the big ones.. I'm after the smaller engine huggin ones?
thanks
Darren
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lsdweb
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| posted on 20/2/08 at 07:14 AM |
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You can just blank it off See this thread
Wyn
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SeaBass
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| posted on 20/2/08 at 08:14 AM |
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I had one but I launched it I think. I'll take a look tonight...
I also have a Vixen S3 that is slowly being rebuilt in the garage! Are you fitting the Zetec to your S2? Any pics??
Cheers
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r1_pete
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| posted on 20/2/08 at 08:35 AM |
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After reading this, mine's getting blanked off, no point keeping it on there if the valve will never open.
So have a blacktop 1.8 one available.
Pete.
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coozer
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| posted on 20/2/08 at 08:54 AM |
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quote:
Originally posted by r1_pete
After reading this, mine's getting blanked off, no point keeping it on there if the valve will never open.
So have a blacktop 1.8 one available.
Pete.
Pete,
That raises another question... the valve will never open?? What does that mean?
And if its blanked off how does it breathe???
Steve
1972 V8 Jago
1980 Z750
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procomp
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| posted on 20/2/08 at 09:05 AM |
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Hi if using high rpm quite often IE trackdays or race. It is not a good idea to just blank it off. It must be allowed to breath so a replacement plate
with a 15mm/5/8 bore fitting is preferable venting to a catch/breather tank.
Cheers Matt
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coozer
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| posted on 20/2/08 at 10:25 AM |
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Searched the www a bit and other peeps on turbo conversions and the like block the original hole off but the drill holes elsewhere.
I also get the impression from some Ford forums that tickover and fuel consumption suffer when it's blocked...
Anyone know a good resource for info??
1972 V8 Jago
1980 Z750
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r1_pete
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| posted on 20/2/08 at 11:23 AM |
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There is a valve in the outlet pipe- the bit which pushes into the breather box, or oil seperator. The breether pipe connects to the inlet manifold,
and at higher vacuum's it is pulled open and the crancase vents, air is sucked in via the vent in the cam cover, which is why that is connected
to the air filter.
I don't see how tickover can be effected as the valve is shut then. Quite ready to be proved wrong though...
I can see at high RPM's crancase pressures building up, but, recon in normal use the cam cover vent is enough.
Pete.
[Edited on 20/2/08 by r1_pete]
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paulf
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| posted on 20/2/08 at 11:30 AM |
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Thats correct , i removed the valve from the fitting so as it is just a straight through pipe and attached a hose to the catch tank.I also found the
breather box was blocked solid and had to clear it by heating with a blowlamp.
There is very little vapour from it unlike the crossflow that used to fill the tank in a few hundred miles.
Paul.
quote:
Originally posted by r1_pete
There is a valve in the outlet pipe- the bit which pushes into the breather box, or oil seperator. The breether pipe connects to the inlet manifold,
and at higher vacuum's it is pulled open and the crancase vents, air is sucked in via the vent in the cam cover, which is why that is connected
to the air filter.
I don't see how tickover can be effected as the valve is shut then. Quite ready to be proved wrong though...
I can see at high RPM's crancase pressures building up, but, recon in normal use the cam cover vent is enough.
Pete.
[Edited on 20/2/08 by r1_pete]
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coozer
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| posted on 20/2/08 at 11:47 AM |
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So then, next question.
If I take the valve out, connect the hose via a T piece to the cam cover breather and then into the airbox will that be OK? or am I just as well to
put little filters on them both?
1972 V8 Jago
1980 Z750
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paulf
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| posted on 20/2/08 at 12:36 PM |
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Yes that would work , but it may be better to just vent to a catch tank as then you will get no contamination of the fuel and carbs etc.
Paul.
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lsdweb
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| posted on 20/2/08 at 01:24 PM |
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Venting it directly or indirectly will result in a catch tank full of oil.
Dunnells recommend blanking it off. They know their Zetecs!
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r1_pete
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| posted on 20/2/08 at 01:31 PM |
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Yes, I'm convinced, mine's going in the bin and getting blanked off, its absolutely spotless inside so not much breathing going on, 36K
engine.
Pete.
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Daza
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| posted on 20/2/08 at 04:07 PM |
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guys,
thanks for the responses, many of you have covered the reason why I 'm retaining the box, but that I just need the smaller one,,, not the big
one.
Some people have said to blank the hole,, theres no way I'm gona rely on just breathing through the cam cover.
In the past I too have run the crank case breather to a t piece and then the cam cover befor fitting the pipe to the backplate of the airfilter.
Seabass,, I'm also on PH's, I beleive I was the first to install a Zetec in a Vixen,, this is my 3rd refinement attempt, a chance to tidy
a few things further. Pictures below are while the car was on the road 8 years ago. My first attempt used the Formula Ford Escort SI setup.
[Edited on 20/2/08 by Daza]
[Edited on 20/2/08 by Daza]
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bob
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| posted on 20/2/08 at 04:34 PM |
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I've used a breather from an early escort zetec, its roughly half the size of the mondeo ones i've seen.
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RichardK
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| posted on 2/11/11 at 03:01 AM |
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I vented mine into a bottle as the idle was too lumpy for my liking with it directly blocked off,sump seemed to weep more too although that could have
been coincidental, my thought is that there is pressure under the piston on the down stroke causing the lumpy idle?
Prob wrong but all I know is that idle improved significantly when it was opened up with no other mods done.
Cheers
Rich
Gallery updated 11/01/2011
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