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![]() | Home > Maintenance & Modifications > Fitted an Oil Seperator \ Catch Can |
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LRJimmy Member Since: 23 Jul 2018 Location: Aberdeenshire Posts: 49 ![]() ![]() ![]() |
Worms,
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shiggsy Member Since: 13 Jan 2013 Location: Kent Posts: 799 ![]() ![]() ![]() |
So like LRJimmy, I have fitted a small container to the base of the Provent (fitted a catch can to my catch can !?!) . It's just a water bottle I cut down and glued back together. The picture below shows what I captured after just over 1000 miles, it was about 3cm worth of oil.
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
On this topic people are installing and talking about fitting an (additional) oil separator.
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MotionInc Member Since: 17 Jun 2019 Location: North America Posts: 1371 ![]() ![]() ![]() |
^^^^^Interesting titbit of relevant info on that model engine design! Thanks for the info. |
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Dave_from_italy Member Since: 17 Jan 2020 Location: Como Posts: 6 ![]() ![]() ![]() |
So there are two school of thought:
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Dave_from_italy Member Since: 17 Jan 2020 Location: Como Posts: 6 ![]() ![]() ![]() |
Sorry but the additional oil separator is placed after passing the upper part of the engine, just before connecting to air aspiration, so valves stems lubrification is not compromised.. ![]() |
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Carel Kriek Member Since: 01 Aug 2016 Location: Stellenbosch, Western Cape Posts: 134 ![]() ![]() ![]() |
"Sorry but the additional oil separator is placed after passing the upper part of the engine, just before connecting to air aspiration, so valves stems lubrification is not compromised.. Shocked , or I'm wrong?"
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Dave_from_italy Member Since: 17 Jan 2020 Location: Como Posts: 6 ![]() ![]() ![]() |
Yes, but the catch can is connected after point 3 in the pic above |
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GW8IZR Member Since: 12 Apr 2019 Location: Anglesey, North Wales Posts: 44 ![]() ![]() ![]() |
When the engine is brand-new and the turbo seals are good etc there’s probably not a huge amount of oil mist in the air stream, by the time we’ve put a few hundred thousand miles on them there’s quite a bit of oil in the intake, a Catch can at that stage probably only reduces the oil mist rather than takes it away altogether. |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
Source of oil vapor (1) ----> Catch can (after 3) -----> Intake valves (after catch can)
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GW8IZR Member Since: 12 Apr 2019 Location: Anglesey, North Wales Posts: 44 ![]() ![]() ![]() |
What I’m saying is the concerns about lack of oil in the intake is probably not worth worrying about, as you well know the intake on a worn engine always has substantially more oil in it than healthy
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Dave_from_italy Member Since: 17 Jan 2020 Location: Como Posts: 6 ![]() ![]() ![]() |
OK you , I'm sure for now I suspend catch can application. |
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jtq4u Member Since: 22 Jan 2017 Location: Fareham Posts: 26 ![]() ![]() ![]() |
a mini catch can sump at the joint that drips seems like the answer to me.. if the vapours have already liquified here then they arn't going on to the intake stems, they are just going to upset the turbo turbine blades.
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jtq4u Member Since: 22 Jan 2017 Location: Fareham Posts: 26 ![]() ![]() ![]() |
do you have a link or reference to some reputable page backing up this view. As someone who's work involves technical patents (often around engines etc) I turned to what I know and found this http://www.freepatentsonline.com/y2016/0047283.html describing the reasoning for routing pcv gasses via the cam cover, none of which include oil vapor travelling post turbo. In fact the reasoning for using the cam case in the equation seems exactly the opposite. The valves are lubricated from the top as far as I have understood it, in any case if the valves needed air intake lubrication then the exhaust valves would never benefit from this would they? It all sounds a bit like a 2 stroke engine to me ![]() from what I have read I would agree that putting a catch can in before the cam cover would be a bad idea (as you'd catch more oil), but I don't see the harm of one after the cam cover (3) in the picture. Actually Even better I might put one right at the leaky joint, as by this time if it has liquified then it was definately not going in the engine as vapour so I am safe even if your desire for oil mist is accurate ![]() |
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