95RedEX

I hated making a new PCV thread, but I've been searching off/on for a month or two and can't find what I want.

I have a Z6 w/T3 turbo. I've run stock PCV for a few years and thought I'd change it over this year.

Searching here, Honda-Tech & other sites, I couldn't find a conclusive way to "fix" the PCV system. I ended up routing the nipple on the valve cover & the black box to a vented catch can. My theory was to simply remove blowby from the throttlebody altogether.

The downside to this system is that it relies solely on crankcase/valvecover pressure to evacuate vapor... No vacuum help. :1

The car seems to run fine and I get no leaks, drips, etc. What bothers me the most is when I shut the car off, the engine lets out a 3 to 4 second hiss, like it's depressurizing I've tried unhooking the VC line, and the line at the black box, and it still makes the same noise.

I also switched to a oil sandwich adapter, but I don't think that would contribute. The only other thing I can think to do is to put the PCV Valve back in, but I'm just not in the mood for that yet.

Any thoughts/comments appreciated...

igotnothin

fill the block with jb weld


Just hook that ---- up right it will be better off in the long run

95RedEX

LOL... Care to be more specific?

Every thread I've read ends up with 20 failed attempts at a proper setup, and 40 pages of arguing about why none of them work.

igotnothin

ok so what you are going to do is

1. install your catch can where you want it..
2. If your catch can has 1 inlet 1 outlet "T" off the out let.
3. For the inlet run 1 line from your holowed out pcv valve and and put a small breather filter on the Head nippel thing
4. From the Intake manifold spot, where the pcv used to conect run that to the other "T" on the catchcan with a one way valve so when you boost no air goes in,
5. Install a barbed fiting on the turbo filter and from that run a line to the remaining spot on the "T" with another one way valve so onley air can flow to the turbo.

If you do it like this, the Intake port will provide sucktion when in vac, and the check valve on the turbo itake filter will shut so it pulls thru the catch can... When you hit boost, the turbo will create vacume, and then the one way valve on the line to Intake Manifold will close thus pulling air thru the catchcan, wich is conected to the Crank Case....

Sorry im not mspaint god

95RedEX

Why bother gutting the PCV valve? There's a nipple right on the side of the black box.

Or does this just give you a topside point to run your line instead of messing around behind the block/under the throttlebody?

I did think about the type of setup you're suggesting, but no one seemed to like the idea of oil ending up in their turbos or intercoolers.

I've been giving a lot of consideration to the exhaust slashcut method instead... I probably need to think this through a little more.

igotnothin

1.i gut the pcv valve cause it provides beter flow, and you dont need it to function as a check vlave any more, but if you are just going to conect to the black box, than thats cool, you can skip that step... i dont have a black box, i have the new valve cover with the pcv valve on the top of it, so its how i am doing mine...

2. Your catch can or if you use the home depot air water seperator things, prevents the oitl from geting in to the turbo, atleast thats what i thought the point of the catch can was...

Cray91

That is my worst fear personally.

stenseltizm

it's not the turbo or intercooler specifically they're worried about, its the fact that those both lead into the engine where oil promotes detonation. I would think if the catch can was good enough than that wouldn't be a problem.

The drawing above would deffinatley work, I'd tee the green line to the vc marked breather filter personally though.

option b if you're worried about oil into your turbo inlet is to run that line to an exhaust slash-cut instead. theory is when the engine is in boost and blowby would be a bigger concern the oil will be getting sucked into your exhaust instead of your turbo intake.

The reason there are so many threads for this is there are so many different ways to do the same thing, supply vac to your crankcase. I don't have an opinion which is better though cause i just left everything open, my engine sucks anyway.

igotnothin

the only reason i left a filter on that set up is to promote flow.. Straighten me out if im wrong, but if you atach a vac line to that port as well, wont you just be creating a vacume senario in the crank, there would be no where for fresh air to come in to the crank... and thus you would be creating a negative pressure senario.. which is bad is it not I really dont know, im asking, so any info is apreciated...

95RedEX

This is why the search button is often useless.

If you got something useful to add, add it.