Thanks - I'm happier now that I will be plumbing it in correctly and that I understand what is going on.

 

You are welcome. I am a firm believer in this mod and wish I saw more people doing it. I imagine that if it was done from new it could make a big difference in the life of the engine.

 

J'sWorld(Jayme? Mr Haney?) and Bosty - how were you able to get 19/32" ID hose to go over the barbs from the original fittings?

We can't get Dayco 80371 anti smog hose in the UK so I asked an automotive hose supplier for the equivalent.

Looks like a 2 part hose with a reinforced outer and an oil resistant inner with a kevlar thread between them.

No way the 19/32" (15mm) was going over those barbs.

They measure at 19-20mm.

So I ordered the next size up - 3/4" = 19mm.

Event with this hose it wouldn't go over the barbs all the way. The problem was the inner liner crushing or tearing when trying to push the barb in.

I tried oiling them, I tried heating the hose in hot water - no good.

I managed to get the hose halfway over the barbs and it seems to be holding but I am worried about it coming off under load.

If anyone is willing to post me 6-7 feet of the correct hose from the US I would be happy to pay for it and the shipping.


Also I noticed that at idle the hose from the inlet manifold to the catch can and then the catch can to the check valve is collapsing under vacuum.

Doe this mean that the check valve is faulty and isn't opening or is this normal?

 

Looks like that is a high press oil hose. As you have experience it probably doesn't expand much or at all. The pcv hose fits. It is very tight but will expand more than the hose you are using. I used some needle nose pliers to expand the hose a bit and hair spray as lube.

 

I bought some of the hose that J'sWorld recommends from an eBay vendor in the US. It was more expensive I am sure than it would have been if I could find the right hose in the UK. After buying the wrong hose twice - it didn't look too expensive anymore so I bit the bullet.

I am really glad that I installed them.



I changed the oil today in the 06 CTTS after 5000 miles - Motul 8100 X-Cess 5W40.

I also added a can and a half of Ceratec as I am now paranoid about bore scoring (I am at 65,000 miles).

I thought I would check the catch cans at the same time as the oil change to see what "would" have gone into my intercooler and intake manifold.

The front can that catches the oil that would have gone into the intercooler had about 50ml of what looked like black engine oil - dirty but not massively contaminated.



The rear catch can that intercepts the oil that would go into the intake only had 15ml of oil but it was a brown sludge that I really didn't want on my valves or anywhere else in the engine.



Overall - I think that this is a great mod to any Cayenne.

Now I am starting to think about the spin on oil filter adapter to get some better filtration.

 

I'm glad it worked out for you! Nobody does this mod. Whatevs.

For the record what I get locally at Autozone is Armormark 19/32 emissions/pcv tubing. This is the correct tubing to use without breaking the bank and still being able to integrate it with factory fittings. It is hard to get on a 3/4 fitting. Like I said earlier I heat it with a heat gun while stretching it with something. Leave the something in there and let it cool and sit overnight. When you remove the something use some hairspray to install it over the fitting and as things heat cycle, it will become extremely tight.

Oil vapor also reduces octane considerably so just another benefit. I just noticed the post with your hoses collapsing under vacuum. I assume you had the pcv valve installed incorrectly. It's more than possible. I have done it being in a hurry.

You guys totally one-upped me using two catch cans! Awesome! If I could only have one it would be the primary. That's what I run now.

I really like the spin on filter adapter mod. I also one-upped the recommendation from LN engineering and use a larger capacity Napa Gold filter than the one they suggest.

Those plastic housings get so tight after a while. They crack/warp, and leak. What's not to like about more filter capacity and a super easy change? I only hand tighten mine so I can still remove it by hand. Never a leak.

 

I just changed the oil again on Christmas eve after another 5000 miles.

Front catch can had 50-60 ml of black engine oil.
Rear catch can had 15-20ml of brown oily sludge.

So pretty consistent with the last oil change.

So in one year since adding the catch cans 100-110 ml of oil has not gone into my intercooler and about 35ml of brown oily sludge has not gone into my intake manifold.

I am pretty happy with that.

 

Awesome! Sounds like your Cayenne is pretty healthy to begin with. As things like turbo's and piston rings wear out and crankcase pressure go's up results will vary.

 

What oil filter do you use instead? NAPA Gold 1042 is what LN suggests but I was planning to use NAPA Gold 1522 instead as it has the same drainback valve but is a longer filter. Thanks

Jeff

 

Joefus, where is your 2nd catch can plumbed into that's capturing the sludge. Seems like the hoses run under the plenum cover, but to which junction exactly. Could you pop off that cover and shoot another pic. In my supercharged 928, I found and used a very compact AOS from Verus Engineering. The cool thing about that one, well there are actually a couple of cool things - 1) it has two independent chambers integrated into the same body so a dual chamber AOS in a single unit, 2) it has a port in the back that allows you to run a warm liquid through it, like coolant, or what I did was plumbed in my heat exchanger intercooler fluid lines. The reason for this is that the heat keeps the oil from sludging up like yours when it gets cold, especially from water vapor mixing in, so it flows out better, and 3) you can plumb it back to the oil pan or to a separate catch-can if you don't want to recycle it. In the 928, I vent the AOS to atmosphere. It's extremely effective, as before the installation I was generating enough crankcase pressure to actually blow oil out the vent line. Now the only thing coming out the merged vent line form the 2 chambers is a little bit of exhaust gas, but no oil. I have mine setup with one chamber as a crankcase vent and the other vents the cam towers. My setup drains back to the oil pan, but it's installed with check valves so pressure can never go backwards and force oil from the AOS back through the vent lines to the cam towers or oil pan.

Here are some pics. I'm thinking of using this same product in my Cayenne, but instead of draining back to the oil pan, using a container or simple billet reservoir to collect the oil, or does anyone know of a good way to plumb this back to the pan in a 957 Turbo? The bottom drain line also has a check valve so it only lets the AOS drain when there isn't any pressure going up that hose (because it's connected to the oil pan).


Internals of the dual-chambers

Look closely and you'll see there in and inlet and outlet for each chamber, yet the two chambers drain to a single valve on the bottom

Cavity in the back to plumb in warm liquid flow to keep the oil warm so it doesn't sludge



Rear cavity with cover installed, inlet & outlet barb fittings, and mounting stud standoffs



Drain line connection back to the oil pan. Vertical is the normal oil fill hose and coming in from the side is the gravity fed drain line from the AOS (with backflow check valve)

Installed position on front of fire wall

Engine bay with AOS in top right corner

 

Wondering is anyone has done this??

 

Hi Petza914,

The can that is catching the brown sludge is the one that replaces the pipe marked "5" in the parts diagrams above.

The inlet to the can is connected to the the check valve that comes from the AOS and the outlet of the can is connected to the inlet manifold where "5" was connected.

I cut the original hose with a Stanley knife (it was very brittle) and reused the connectors at each end with new hose. The hose barbs that came with the Mishimoto cans were too small for the hose so I bought brass replacements from Amazon for a few dollars.

Mine is a 955 so your connections might be slightly different.

I just noticed how dusty my engine bay is in this pic (walks away, head down).

 

One of my Facebook Support Group members uses this simple setup:

 

Hey guys,
If anyone is interested, here is how I did my 957s.
I wanted to keep it as factory looking as possible and with the covers on, you cant really tell it has been modified.

 

Has anyone thought about this guy?

https://store.goapr.com/products/APR...s-Only%29.html

Comes with the snap on fitting, but a bit expensive.