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beach_creature Samba Member
Joined: April 11, 2014 Posts: 532
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Posted: Tue Apr 30, 2019 2:04 pm Post subject: Provent 200 |
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I have recently installed this onto my AAZ. I am amazed at how much oil the Provent diverts From going back to the intake.
After about 600 km/400 miles, I have about 4” of oil collected in 1/2” PVC tube. This is maybe 30-50 mL.
No wonder I was constanly dripping oil from my silicone intake ducting.
So now the question, is there something wrong with my PVC valve? Why am I getting so much oil in my blow by? Or is this normal? My PVC is sitting horizontal the way it was intended, as opposed to slanted over with the 50* tilt.
Thoughts?
But this thing really works!
I have now used the Provent check valve and have it draining into the block, so as not to lose oil.
_________________ 84 Westy
1.9TD AAZ
5spd manual with Locking Peloquin TBD |
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Mike Robinson Samba Member
Joined: June 18, 2010 Posts: 386 Location: Nanaimo BC Canada
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Posted: Tue Apr 30, 2019 8:11 pm Post subject: Re: Provent 200 |
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Interesting product.
Where did you buy it and how is it plumbed in?
Thanks
Mike
'82 Westy diesel AAZ |
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beach_creature Samba Member
Joined: April 11, 2014 Posts: 532
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Posted: Tue Apr 30, 2019 8:45 pm Post subject: Re: Provent 200 |
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This is where I got mine
https://www.idparts.com/mann-provent-200-p-2334.html
It’s a catch can with a filter in it. Gases leaving PCV go into it. Then come out and go back to intake.
Drain out the bottom of separated oil. Drain it off, or let it drain back into engine.
There were a few samba threads on the Provent years ago. _________________ 84 Westy
1.9TD AAZ
5spd manual with Locking Peloquin TBD |
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rmcd Samba Member
Joined: October 29, 2010 Posts: 1348 Location: PNW - its a dry rain.
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Posted: Tue Apr 30, 2019 9:03 pm Post subject: Re: Provent 200 |
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Google provent and there are lots of resellers.
My tdi swap came with an open to atmosphere catch can. It was a POS. It leaked. My turbo leaked.
I plumbed in a provent and so far the turbo hasn’t dripped in 600 miles. The provent is dry and hadn’t accumulated anything the first couple hundred miles. I’ll look this weekend.
_________________ VW LT40 build. Like a Vanagon but 30% larger in every direction and 40% slower even in metric.
https://www.thesamba.com/vw/forum/viewtopic.php?t=749359&highlight= |
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Zeitgeist 13 Samba Member
Joined: March 05, 2009 Posts: 12103 Location: Port Manteau
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Posted: Tue Apr 30, 2019 9:13 pm Post subject: Re: Provent 200 |
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I have a similar unit lifted from an ancient MB diesel--left side of the bay. I think it's made by Mann. It drains back into the crankcase where the original turbo drain entered--my turbo drains into the oilpan.
_________________ Casey--
'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik? |
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westyventures Samba Member
Joined: December 29, 2004 Posts: 2305 Location: Oregon Outback
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Posted: Tue Apr 30, 2019 10:08 pm Post subject: Re: Provent 200 |
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Plumb the CCV filter drain into the pan. Below oil level, no check valve needed. Above oil level, add one for sure, ask me what happens if you don't.
There is no 'PCV'. The vent atop the valve cover is free flowing both ways. Yes, it may have some blowby. Pull the hose from the vent on the valve cover when running and see how much smoke comes out. Should be barely any. |
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Mike Robinson Samba Member
Joined: June 18, 2010 Posts: 386 Location: Nanaimo BC Canada
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Posted: Wed May 01, 2019 6:54 am Post subject: Re: Provent 200 |
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So ...
From the top of the valve cover vent into the prevent and the old line from the valve cover vent to the air input is no longer required?
What is the easiest way to return the oil back into the engine? - I am not keen on drilling a hole. Could I route it into the unused dip stick on top of the engine (I have an AAZ)
Thanks
Mike |
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cawvin Samba Member
Joined: August 29, 2013 Posts: 63 Location: Whatcom County
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Posted: Wed May 01, 2019 7:22 am Post subject: Re: Provent 200 |
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Quote: |
What is the easiest way to return the oil back into the engine? - I am not keen on drilling a hole. |
My provent drain line is tee'd into the oil fill port in the bottom of the pan, rear-of-vehicle facing corner. Maybe the dipstick hole could be made to work, depending on where your filter is mounted? I'd avoid any uphill routing in the drain plumbing though.
I have a check valve in my drain even though it comes in below the oil line of the pan. I know some say it is not necessary but I'd do it.
Also I'd be sure to mount the filter as high in the engine compartment as you are able. Too low, and oil can back flow up the drain line. (again, check valve!)
Great little unit just be mindful of your plumbing. Probably also smart to check the filter element frequently during your first few drives to monitor what's going on in there. _________________ 1986 tin top syncro w/ ahu tdi @ 50* |
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beach_creature Samba Member
Joined: April 11, 2014 Posts: 532
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Posted: Wed May 01, 2019 9:24 am Post subject: Re: Provent 200 |
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Mike Robinson wrote: |
So ...
From the top of the valve cover vent into the prevent and the old line from the valve cover vent to the air input is no longer required?
What is the easiest way to return the oil back into the engine? - I am not keen on drilling a hole. Could I route it into the unused dip stick on top of the engine (I have an AAZ)
Thanks
Mike |
Does your turbo drain into the oil pan?
If so, you can use the old bung in the side of th block for the Provent to drain in to.
As far as plumbing, hose from PCV / puck on valve cover, to inlet of Provent. Then outlet of Provent back to intake. So you’re just adding the unit inline between the puck and the intake. _________________ 84 Westy
1.9TD AAZ
5spd manual with Locking Peloquin TBD |
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westyventures Samba Member
Joined: December 29, 2004 Posts: 2305 Location: Oregon Outback
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Posted: Wed May 01, 2019 10:01 am Post subject: Re: Provent 200 |
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Drain can go to the bottom of the pan if you have a stock TD pan with that connection at the bottom. Or, tee into the turbo drain where it attaches at the side of the block. You MUST have a one-way check valve if the drain is above oil level, as it will suck and run away on crankcase oil. Not a fun scenario at all. Mann didn't include any documentation as to this important step when I installed mine years ago, resulting in my perfect 20K mile TDI running away and melting the pistons. |
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Zeitgeist 13 Samba Member
Joined: March 05, 2009 Posts: 12103 Location: Port Manteau
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Posted: Wed May 01, 2019 10:29 am Post subject: Re: Provent 200 |
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Karl, I assume that runaway scenario was on a 50 degree install. Is the working theory that crankcase pressure inhibits the oil from draining properly, and it backs up in the catch can enough to get sucked back into the intake tract? Any hints as to where to locate a proper check valve? _________________ Casey--
'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik? |
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cawvin Samba Member
Joined: August 29, 2013 Posts: 63 Location: Whatcom County
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Posted: Wed May 01, 2019 12:28 pm Post subject: Re: Provent 200 |
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Zeitgeist 13 wrote: |
Any hints as to where to locate a proper check valve? |
According to the Mann installation manual:
Quote: |
The oil return fitting (6) is connected to the non-return valve with a drain line.
The non-return valve is then connected approx. 30 to 50 mm above the maximum oil level of the engine oil sump.
For the ProVent system to function properly, the minimum distance from the non-return valve to the oil return fitting (6) of the ProVent housing must be at least 350 mm (see Fig. 2).
Any angled positions which occur during mobile applications, which lead to a fluctuating oil level, must always be taken into account.
MANN+HUMMEL always recommends the use of a non-return valve for all ProVent installations. |
Full manual is available here, mine didn’t ship with one.
https://oe-products.mann-hummel.com/fileadmin/user...ent_en.pdf _________________ 1986 tin top syncro w/ ahu tdi @ 50* |
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beach_creature Samba Member
Joined: April 11, 2014 Posts: 532
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Zeitgeist 13 Samba Member
Joined: March 05, 2009 Posts: 12103 Location: Port Manteau
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Posted: Wed May 01, 2019 1:23 pm Post subject: Re: Provent 200 |
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That's a pricey little valve. You'd think Mann would include it with the Provent _________________ Casey--
'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik? |
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Gnarlodious Samba Member
Joined: September 28, 2013 Posts: 2312 Location: Adobe Jungle USA
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Posted: Wed May 01, 2019 4:02 pm Post subject: Re: Provent 200 |
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beach_creature wrote: |
So now the question, is there something wrong with my PVC valve? |
There isn’t a PVC valve, and there isn’t even a PCV valve. That hockey puck thingie is simply a cyclone separator that slings oil droplets against the outside to condense them. Trouble is, it doesn’t work so well on a slant because the oil puddles at the downhill side instead of draining. It sits there until you punch it or are climbing a long hill and blowby increases such that it suddenly catches that puddle and blasts it out the hose.
An adapter would be a marketable product, it would level off the separator for the Vanagon installation. _________________ Vanagon ’83 diesel AAZ w/Giles injection, 5spd 4.57R&P+TBD and a '78 diesel Rabbit |
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beach_creature Samba Member
Joined: April 11, 2014 Posts: 532
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Posted: Wed May 01, 2019 5:06 pm Post subject: Re: Provent 200 |
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Mine sits upright. Still blows by a lot of oil. Well if it's not a PCV then what's it called? I know everyone reffers to it as a puck because it looks like one. It must have a name.
_________________ 84 Westy
1.9TD AAZ
5spd manual with Locking Peloquin TBD |
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crazyvwvanman Samba Member
Joined: January 28, 2008 Posts: 9895 Location: Orbiting San Diego
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Gnarlodious Samba Member
Joined: September 28, 2013 Posts: 2312 Location: Adobe Jungle USA
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Posted: Wed May 01, 2019 6:14 pm Post subject: Re: Provent 200 |
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Does the blowby look like a lot? I got an idea putting the dashcam in the engine room and going for an uphill drive. _________________ Vanagon ’83 diesel AAZ w/Giles injection, 5spd 4.57R&P+TBD and a '78 diesel Rabbit |
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Jeffrey Lee Samba Member
Joined: February 04, 2014 Posts: 1488 Location: Wisconsin
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Posted: Wed May 01, 2019 6:48 pm Post subject: Re: Provent 200 |
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Flex Technologies, one maker of silicone automotive hoses, does not recommend using silicone for oil, gasoline, or diesel fuel:
"... we recommend that you stick with other materials than silicone for any applications that will allow fuel or oil to come into contact with the hose. However, we do offer special fluorocarbon and fluorosilicone liners that offer superior chemical resistance."
https://www.siliconehose.com/blog/oil-fuel-and-silicone-hoses-/
Anyone here been running oil/vapor through silicone hose for an extended period (years)? How has it held up?
I once used conventional EPDM coolant hose for a diesel crankcase vent application, and the rubber was weeping oil within days. I ended up using PCV hose, presumably of a different compound, and it's been holding up for a few years now. |
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Gnarlodious Samba Member
Joined: September 28, 2013 Posts: 2312 Location: Adobe Jungle USA
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Posted: Wed May 01, 2019 7:19 pm Post subject: Re: Provent 200 |
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Not advised due to the difficulty of securing oily silicone which is already slippery enough.
I have a silicone tube downstream from my turbo, for the first few years it sweated a clear fluid. Really weird. Matter of fact here is a picture:
_________________ Vanagon ’83 diesel AAZ w/Giles injection, 5spd 4.57R&P+TBD and a '78 diesel Rabbit |
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