Topic: Oil catch can and check valve

[RufusMacblorf]

I've been reading posts about installing oil catch cans, and I'm wondering why some people are completely removing the braided hose with the check valve.  Wouldn't it be safer to keep the check valve in series with the catch can?  Removing the check valve seems to be DDM's preferred method, for example.  I assume they have a good reason, but I can't figure what it is.

Any ideas?

[Dr. Gronk]

I'm with you, I think removing it would defeat the purpose of the PCV valve on the intake side of the engine. Instead of positive pressure venting right before the engine it would vent through the OCC into your intake (through turbo, IC, etc, past MAF if you moved it).  I used a 12" gas line cut in half to keep the braided lines (and check valve) in place.

[Dave@DDMworks]

I've been reading posts about installing oil catch cans, and I'm wondering why some people are completely removing the braided hose with the check valve.  Wouldn't it be safer to keep the check valve in series with the catch can?  Removing the check valve seems to be DDM's preferred method, for example.  I assume they have a good reason, but I can't figure what it is.

Any ideas?

Actually our instructions have customers removing the line off the front of the valve cover and connecting the OCC to that port and leaving the braided line in place. Our early instructions had the option of removing the braided line with the check valve and using that for the line to the OCC, but we found that some cars had issue with doing it that way. It worked well on some cars because it gave air 2 paths to move from the valve cover to the intake, therefore decreasing the flow through each of them and giving more time for the oil to drop out into the OCC or the factory catch built into the valve cover.

I tried to link the current install instructions, but Yahoo (our host) is not running real well this morning. Once they get back up I will post the current install instructions.

Thanks,
Dave

[Arabas]

i find your reasoning guys perfecty logical!
the only thing to consider is that in many cases it has been reported that the check valve gets stuck open and there is no indication if it is open or not....
so, keeping it in place won't guarrantee you that it still works (coz it may fail anyway). that's why the catch can is there.

you may find some more info about these questions in the topic below

http://www.kappaperformance.com/forum/index.php/topic,5657.25.html

after shooting ddm with questions about the very same thing, and the double occ, i decided that they can't be wrong, so i installed their way, and i had absolutely no problems

[Arabas]

  I used a 12" gas line cut in half to keep the braided lines (and check valve) in place.

it may be a lot to ask, but can you post some details of how u did that and what exactly did you do. (if written in Greek it would perfect )

i got confused again...
Dave, you suggest to use the OCC for the line that goes from the mid of the valve cover to the intake, correct?

(sorry, about the mess, seems like a ;anguage barrier, or just getting tired at the end of the working day- 5 p.m. here)

[Critterman]

Απ: Το πετρέλαιο μπορεί να αλιευμάτων και βαλβίδα
 «Απάντηση # 4 στις: Σήμερα στις 10:04:04 πμ» QuoteQuote από: Δρ Gronk στις Σήμερα στις 9:05:35 πμ
   Χρησιμοποίησα ένα 12 "γραμμή διακοπής του φυσικού αερίου κατά το ήμισυ για να κρατήσει τις πλεγμένες γραμμές (και βαλβίδα αντεπιστροφής) στη θέση του.

 μπορεί να είναι πολλά να ρωτήσω, αλλά μπορείτε να δημοσιεύσετε κάποιες λεπτομέρειες του πώς το u έκανε και τι ακριβώς κάνατε. (αν γραμμένο στα ελληνικά θα τελειοποιήσει)

 Πήρα ξανά σύγχυση ...
 Dave, σας προτείνουμε να χρησιμοποιήσετε το OCC για τη γραμμή που πηγαίνει από τα μέσα του επικαλύμματος βαλβίδος με την πρόσληψή τους, σωστά;

 (συγγνώμη, για το χάος, φαίνεται σαν ένα εμπόδιο της γλώσσας, ή απλά κουρασμένοι στο τέλος της εργάσιμης ημέρας-5 μ.μ. εδώ)


Best I could do Arabas, hope it helps

[Arabas]

 

now, that's even more confusing.....

[Critterman]

   Damn google translator   

[RufusMacblorf]

Actually our instructions have customers removing the line off the front of the valve cover and connecting the OCC to that port and leaving the braided line in place. Our early instructions had the option of removing the braided line with the check valve and using that for the line to the OCC, but we found that some cars had issue with doing it that way. It worked well on some cars because it gave air 2 paths to move from the valve cover to the intake, therefore decreasing the flow through each of them and giving more time for the oil to drop out into the OCC or the factory catch built into the valve cover.

I tried to link the current install instructions, but Yahoo (our host) is not running real well this morning. Once they get back up I will post the current install instructions.

Thanks,
Dave

The various photos I've found online have been a little confusing, so I appreciate the clarification.  Thank you!

I think I'll replace the PCV valve/line while I'm at it, just to be safe.

[Dr. Gronk]

I bought one of these from napa part number 730-4931 (3/8" gas line with quick disconnect fitting - double bead line) and cut it in half (with a small plumbing pipe cutter) .




I detached the middle line at the valve cover, and the front line at the turbo inlet, leaving the braided lines (and check valve in place).  I used the gas line sections to connect to the braided hoses, and ran new rubber hose to each OCC and back.

Arabas: Μετάβαση έχουν ένα ωραίο δείπνο και μερικά ποτά. Τα πάντα θα κάνει τέλεια αίσθηση μετά από αυτό.

Rufus: You mean the check valve, the PCV valve is on the intake side of the engine and it's not easily accessible.   There are three ventilation spots on the LNF.

[RufusMacblorf]

I bought one of these from napa part number 730-4931 (3/8" gas line with quick disconnect fitting - double bead line) and cut it in half (with a small plumbing pipe cutter) .

(Image removed from quote.)


I detached the middle line at the valve cover, and the front line at the turbo inlet, leaving the braided lines (and check valve in place).  I used the gas line sections to connect to the braided hoses, and ran new rubber hose to each OCC and back.

Arabas: Μετάβαση έχουν ένα ωραίο δείπνο και μερικά ποτά. Τα πάντα θα κάνει τέλεια αίσθηση μετά από αυτό.

Rufus: You mean the check valve, the PCV valve is on the intake side of the engine and it's not easily accessible.   There are three ventilation spots on the LNF.

I meant the check valve, yes.  Thanks for the correction.

[Sly Bob]

Our early instructions had the option of removing the braided line with the check valve and using that for the line to the OCC, but we found that some cars had issue with doing it that way.

Dave, what sort of problems did some customers have with removing the check valve?

[Arabas]

thx Dr Gronk!!!
this google translator is a totally new language...

[Arabas]

would it work to put a 3/8" check valve on a OCC set up that currently doesn't have one (i mean put it in the line that goes from the occ to the intake?

something like that.
http://www.ebay.com/itm/3-8-Kynar-Vinton-Check-Valve-HHO-projects-/110440936293?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item19b6caf365

[Dave@DDMworks]

Dave, what sort of problems did some customers have with removing the check valve?

There were a couple people that had a high pitch whistle develop and also a couple cars that were heavily modified that had some oil vapor still get into the intake. With the check valve in place we have not had any problems reported.

We also had some creative installs that tied both lines together off of the valve cover and into the oil catch can, that does not work.

Ivy got the most up to date instructions up on the site also - http://ddmworks.com/instructions/sol_sky/oil_catch_can.pdf

Thanks,
Dave

[TomatoSoup]

Dave, those instructions mention taking the check-valve line off to aid in the install.  However, it does not mention that line again.  I assume that it should be restored to the same path (to the plastic inlet tube and nipple) where it was before?

[Dave@DDMworks]

Dave, those instructions mention taking the check-valve line off to aid in the install.  However, it does not mention that line again.  I assume that it should be restored to the same path (to the plastic inlet tube and nipple) where it was before?

Yeap.

[Arabas]

That s completely different than the set up in the manual that i received..