A job for over the winter is to fit a oil catch tank as the engine currently breathes into the engine compartment via the cam cover.
My question is has anyone added a crankcase breather, and would there be any improvement from the standard setup?
Thanks in advance.
If I undrstand correctly, you say you simply have the two pipes on the top of the cam cover venting to atmosphere?
Do you get much oil spraying out of them? If not then fair play!!
I had a catch tank on my K series and I do now on my audi. I breath from the cam cover and also from the crank case, although there isn’t an obvious place to do that from on a K series. A crankcase breather is good, as often the crankcase pressure vents through the oil retun drilling from the head and therefore hold oil in the head. I know this for a fact on Cossie YB engines, but am not sure if it is the case with the K series, Dave Andrews is your man to answer that question.
Have all of your breathers go to the catch tank. I have always had a return to the sump, going in below the oil level to return and breathed oil. This seems to be a contraversial topic, but it has always worked for me.
Sean…
From the cam cover one pipe vents to atmosphere and the other one is connected to the dipstick tube. Which i guess is a sort of crankcase breather. Don’t get oil spraying from the breather but there is a bit of a oily smell in the car at low speed.
Totally agree with you about the YB Cossie setup and is the reason that i asked the question. As i had a Graham Goode three port oil breather on my old Escort Cosworth which breathed from both sides of the crankcase and drained back to the sump and worked very well. Was toying with the idea of fitting it on the Exige but connecting the oil return back to the sump with the engine still in place would be a pain, if not impossible.
HI Graham,
Hope all well with you and the family!
I fitted a Mocul catch tank last winter and just ran 2 vent pipes from the cam cover to the tank, that then vented ‘overboard’! This stopped the smell of oil and also all that horrid oil laden air from going back into the TB’s and then the engine!
You will need to remove the rail, and then block up the 8 ‘nipples’ that the rail feeds into the TB’s with. I just ‘looped’ some 4mm silicon pipe between each ‘nipple’ within each TB.
I also removed the carbon filters at the same time and re-jigged the vacuum lines to the 2 air accumulator spheres. All of this really tidied up the engine bay!
You then need a REALLY friendly MOT tester!!! 
Cheers,
Pete.
Hi Pete!
Were all good thanks for asking. Hope all the same with you and still on the mend?
The vac pipes and carbon filters have already been removed and does improve the look of the engine bay and reduce the chances of air leaks. So just the catch tank to fit. Were did you get the Mocal tank from and how much was it?
Regards,
Graham.
HI Mate,
I bought a Mocul in welded ali. LOVELY work and deffo worth the premium over those coke cans on ebay! Was going to buy it from Deemon T, but got a ‘second hand’ unused one from a Pug 106 club member who lived about 1/2 mile from me!!! 
I fitted the Mocul on the left hand rear bulkhead, which made it easy to run the two pipe runs over the CF airbox. The Mocul is good because it has 2 inlets and one outlet, which I just ran aft to exhaust behind the rear tyres!
(The added benefit of this was it laid a nice slick behind me that stopped you getting past!!! 
)
A very worthwhile mod!
Have fun. Pete.
Graham, I might have a Pro Alloy catch tank knocking around that I don’t use any more that you can have for nowt mate!
Top man Sean! I’ll give you a ring tomorrow.
Cool, I will try and dig it out.
Buried in the garden then?
Buried in the garden then? [/quote]
No it’s probably buried in the huge pile of castor shims
burried under loads of crap in my garage actually