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PostPosted: Mon Dec 18, 2017 5:09 pm 
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998cc
998cc
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Joined: Tue Nov 13, 2007 4:17 pm
Posts: 829
Location: NOR, Perth, W.A.
The engine now has a catch can. There are two breather ports in the 4E valve cover - one normally leads to the recirculation valve and one is a PCV valve. I'm replacing the factory recirc valve with a Turbosmart one and the PCV valve was faulty (was allowing air flow both ways) so I decided to the PCV system and replace it with a catch can - a Provent. I use one of these in my diesel 4WD and it's quite effective and they have a really small model ~150mm high & 100mm diameter.

To join both valve cover ports to the Provent filter, and using off-the-shelf hose adapters and pieces to join all the sizes of outlets it was going to a mess of so I made some custom adapters myself. I used some HDPE rod and machined some pieces to make a Tee and 90 degree pieces. They are glued together with a Loctite glue specific for Polyethylene.
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The filter has been mounted on the inner guard above the drivers side engine mount and the result is clean looking connections that doesn't look like it has just been hacked together. All fittings are a tight fit for both the hose & the valve cover ports so that there is no need for any hose clamps, although it's not a pressurised system anyway. The outlet hose from the filter is routed to a piece of 1/2" steel tube welded into the intake piping (pre-turbo). This completes a closed crankcase ventilation system where no air or vapour is vented to the atmosphere.
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To drain the Provent of any oil, I used a spare Fumoto valve (normally screwed into a oil sump) and made some brass adapter pieces for the drain line. This valve will be bolted to the subframe in the wheel arch.
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_________________
-Alan
I blame my dad for my love of minis. I think I was conceived in the back seat of one :D
I also blame my Dad for me being 6' 1" - not really the optimum height for driving a Mini.


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