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> Which Vendor wants to jump on making these..., 022115542
JamesM
post Aug 19 2020, 07:02 PM
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What would it take to get one of our vendors to make these?

022115542 - crank case valve

Surprisingly critical part for proper operation on 72-74 djet cars, not just for crank case venting but has a large impact on idle control and how d-jet runs. Supposed to be a regular maintenance/replacement item as well yet they haven't been available for close to 20 years. Struggling to find any that don't result in some sort of idle control issue these days.

Less critical is the associated nut 022115544

@Mikey914 @UROpartsman or anyone else want to bite?
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914werke
post Aug 19 2020, 07:13 PM
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Ummm
Unless this is concours thing (IMG:style_emoticons/default/confused24.gif)
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Not_A_Six
post Aug 19 2020, 07:39 PM
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QUOTE(JamesM @ Aug 19 2020, 06:02 PM) *

What would it take to get one of our vendors to make these?

022115542 - crank case valve

Surprisingly critical part for proper operation on 72-74 djet cars, not just for crank case venting but has a large impact on idle control and how d-jet runs. Supposed to be a regular maintenance/replacement item as well yet they haven't been available for close to 20 years. Struggling to find any that don't result in some sort of idle control issue these days.

Less critical is the associated nut 022115544

@Mikey914 @UROpartsman or anyone else want to bite?


This might work for you:

http://www.914world.com/bbs2/index.php?act...=2&t=347986

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914werke
post Aug 19 2020, 08:12 PM
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(IMG:style_emoticons/default/biggrin.gif)
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JamesM
post Aug 19 2020, 09:50 PM
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QUOTE(914werke @ Aug 19 2020, 05:13 PM) *

Ummm
Unless this is concours thing (IMG:style_emoticons/default/confused24.gif)


Call me a perfectionist... But also it is going on a bumblebee.

Replacing with a modern valve is an option but they both look and operate differently than a stock valve. If it was coming to hacking a solution together I would probably just put a restrictor inline with a bad valve to keep the idle down (something I have done on other 914s in the past, but would prefer to have stock operation if possible.
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davep
post Aug 19 2020, 10:13 PM
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Can you post a photo?
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Mikey914
post Aug 20 2020, 12:03 AM
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Happy to take a look at these this next week. I'm pretty sure I have one laying around.
Can't see these tings being too expensive.
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JamesM
post Aug 20 2020, 12:17 AM
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QUOTE(davep @ Aug 19 2020, 08:13 PM) *

Can you post a photo?




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JamesM
post Aug 20 2020, 12:31 AM
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QUOTE(Mikey914 @ Aug 19 2020, 10:03 PM) *

Happy to take a look at these this next week. I'm pretty sure I have one laying around.
Can't see these tings being too expensive.


Last time Porsche had these they were around ~$10. Biggest issue I see is probably figuring out the proper spring pressure.

https://members.rennlist.com/pbanders/PCV.htm


Used on some VWs as well so may be a larger market? IDK? I suspect a lot of people don't realize how badly worn ones can mess with how d-jet cars run as people don't really associated them with the injection system, but in addition to causing air leaks/idle speed issues worn ones can cause erratic manifold pressure under driving conditions, which can result in change to the MPS output that messes with the FI mixture and can cause missfires/the mystery "d-jet" bucking that no one can ever track down because no one ever gives the crank case vent valve a 2nd thought unless they have failed completely.
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JamesM
post Aug 20 2020, 01:00 AM
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Was gone over in depth long ago on STF but for some reason doesn't ever seem to be brought up here.

https://shoptalkforums.com/viewtopic.php?t=34350
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Not_A_Six
post Aug 20 2020, 10:35 AM
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QUOTE(JamesM @ Aug 20 2020, 12:00 AM) *

Was gone over in depth long ago on STF but for some reason doesn't ever seem to be brought up here.

https://shoptalkforums.com/viewtopic.php?t=34350



That was a very interesting discussion. Thanks.

There was a lot of really bad information being bandied about until Brad Anders stepped in.

IMO, Brad Anders has it exactly right for the particular part you are looking for. It has two modes -- fixed metered and shut. Contrast this with a modern valve that varies its metering based on the differential pressure across the valve. For that 022115542 part, correctly plumbed to the plenum (with crankcase replacement air provided via the anti-flashback valve), it's going to be "open" just about any time the engine is running. It should only close under backfire, start up, and *possibly* under WOT.

Under WOT with a lot of blow-by, crankcase pressure should be limited to very slightly above atmospheric pressure by back-venting through the anti-flashback valve. At the same time, the manifold vacuum is less than 1 In-Hg because the throttle butterfly is fully open. So the differential pressure across the PCV valve is likely less than 2-3 In-Hg or so. Somebody would need to characterize the valve to see how it's supposed to behave at that pressure. But, I suspect under these conditions, the majority of the gasses are vented to the airbox through the anti-flash valve rather than through the PCV valve, even if it's open at WOT.
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UROpartsman
post Sep 14 2020, 10:49 AM
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We've had this item on the "maybe" list for years and it wouldn't be hard to make, does anyone have a NOS piece or good sample we could use?
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914Sixer
post Sep 14 2020, 12:10 PM
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I should have a used one in the warehouse.
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Mikey914
post Sep 14 2020, 01:07 PM
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Ok,
Had started drawings on this, but if URO wants to take it on let them. (IMG:style_emoticons/default/popcorn[1].gif)
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second wind
post Sep 14 2020, 05:45 PM
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So...is there a good way to service these little suckers? I would love to clean mine if someone has a good procedure to follow but my usual is to muscle f..k the part in question and then be in non-op for a week or so. It is 47 year old plastic that has been heat tempered 200,000 times.....I bet I break it if I touch it. Car runs fine but the idle decides by itself when it wants to be perfect.....any suggestions would be greatly appreciated. Anything to make the car happier as we all know happy car happy owner. Thank you very much.
gg
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JamesM
post Sep 14 2020, 09:37 PM
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QUOTE(UROpartsman @ Sep 14 2020, 08:49 AM) *

We've had this item on the "maybe" list for years and it wouldn't be hard to make, does anyone have a NOS piece or good sample we could use?


I have 3 or 4 questionable if not outright bad ones. Good for the physical dimensions but probably not helpful on determining the internal spring rate.
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UROpartsman
post Sep 17 2020, 11:45 AM
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QUOTE(914Sixer @ Sep 14 2020, 11:10 AM) *
I should have a used one in the warehouse.

Thanks Mark, we'll get back to you late next week on that, our head of product development is currently out of the office.
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second wind
post Sep 17 2020, 10:58 PM
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Cleaned my existing one.....seems to function just fine....found a lose vacuum line in the process so hoping for overall improvement....gotta' love the process....will report back....gg
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Eric_Shea
post Sep 18 2020, 09:42 AM
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Find someone that knows how to put a modern EFI system on there... (IMG:style_emoticons/default/huh.gif) (IMG:style_emoticons/default/wink.gif)
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second wind
post Sep 18 2020, 05:33 PM
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Well...I said I would report back not that anyone gives a s__t....car runs like a rocket now. Found a loose big vacuum line and sealed around the oil fill spout and cleaned the PCV and buttoned it all up.....started with half a turn of the key and just keep on running and sounded very happy. These pancake engines love their vacuum, eh?
All the best,
gg
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