VVTi Soloid

[Roman]

Yep, definitely water lines going to ISCV/throttle body.

I've got mine in bits at the moment, I'm pillaging the ISCV for quads setup to keep it idling nicely.

I'll take some pics when I find my camera.

I never ran water lines to mine, and seemed to run fine... But thinking about it now.

My ISCV was completely clogged and gunged up with oily residue, to the point where it couldnt even turn.

Perhaps part of the function of heating the throttle body/ISCV is so that the oil vapor from PCV doesnt condense on the cold metal, stays suspended in the air to be burnt by the engine.

As well as preventing it from freezing shut from the pressure drop.

[puretone]

oh hahaaaaaaaaa! now this is a clue to me, i'll have to take my TB apart and overhaul it as well, i noticed a bunch of gunk on mine way back when....

[Roman]

I think it's definitely gonna get oily and gunked up over time, either way... Nothing but good can come from giving it a bit of a clean, or at least a look.

One thing though if you're getting oily mess everywhere, is to check that the PCV valve works properly.

If it gets clogged or jammed a little, then more of the oily crank case air ends up going into the other pipe, which dumps it all *ahead* of the throttle body instead of the other hose controlled by the valve, which dumps it straight into the plenum. (by the brake booster line)

If that makes any sense, haha.

[puretone]

Originally Posted by Roman

I think it's definitely gonna get oily and gunked up over time, either way... Nothing but good can come from giving it a bit of a clean, or at least a look.

One thing though if you're getting oily mess everywhere, is to check that the PCV valve works properly.

If it gets clogged or jammed a little, then more of the oily crank case air ends up going into the other pipe, which dumps it all *ahead* of the throttle body instead of the other hose controlled by the valve, which dumps it straight into the plenum. (by the brake booster line)

If that makes any sense, haha.

yeah I had mine venting to atmosphere for a while....so probably that hot air didn't get to it for a while and really caused the whole mess to gunk up and solidify. I have it hooked back up now because I was getting sick of the little filter sitting there and clunking around....
I'm gonna be doing brake-lines soon anyways, might as well strip off the TB and do some general house cleaning

[assassin10000]

For those that want the benefits of a PCV system without the extra gunk I'd recommend running an 'oil catch can' or rather as the B.A.R. here would label it. An oil seperator.

Run the PCV hose to a catch can/oil seperator then back to the intake manifold. Sometimes they are filled with steel wool or something similar to act as a filter/pull the oil/etc vapors from the crankcase out and 'catch' it in a container.

For those here in the USA who aren't aware of it, they are 100% legal. Even with KKKalifornia's stringent smog regulators (bleh!). I've been to the smog referee several times and after BS'ing with the guy there I found out that per appendix K. of the rule book ANY and ALL oil seperators are perfectly legal. He even was kind enough to photocopy it for me as proof.



More info on smog BS that I've learned/come across:
Club4AG Forum Topics: Smog referee/Smogging your car: tips & info that may help you.

Andrew

[MANDALAY]

Not understanding the PCV system. ?
The inlet 3 inch pipe going to the TB has a hose at 90 degrees coming of it and goes to the to of the camshaft cover.
Does this mean as air is sucked into the TB. any vapours and at worst oil will be drawn also ?
I thought the baffle inside the cover is to stop that ?
So does a oil seperator break into that line ?

[assassin10000]

Originally Posted by MANDALAY

Does this mean as air is sucked into the TB. any vapours and at worst oil will be drawn also ?

I thought the baffle inside the cover is to stop that ?

So does a oil seperator break into that line ?

Yes.

The baffle helps, but does not stop all of it.

This is a much larger problem in the 4a-ge engine where oil can back up in the cylinder head during either higher G turns or accel (depending on engine orientation) and actually dump a significant amount of oil into the intake system. I've done it doing LH donuts in my ae86 before getting a catch can. Thought I blew my motor . Then I realized what happend & added a catch can. No problems since.

Yes it 'breaks' the line. Or rather runs inline. Basically you run from the pcv/valve cover to the catch can, then back to the intake. It provides a secondary baffle/container to hold the oil and prevent it going back through the intake. While still creating vacuum/low pressure in the crankcase which helps with gas mileage/power/oil consumption & the ability of seals to do their job.

Full on race bikes (moto gp, world super bike, ect) run a pcv system for those reasons - IIRC . And you know they're trying to squeeze every last bit of HP...

Andrew

[MANDALAY]

^ COOL thanks for the explanation !
I looked at the factory catch can on the Turbo on RPM garage l see the in and out but there is a third line , looks like a drain . where would that line go ?
Do after market cans have this

[assassin10000]

Originally Posted by MANDALAY

^ COOL thanks for the explanation !
I looked at the factory catch can on the Turbo on RPM garage l see the in and out but there is a third line , looks like a drain . where would that line go ?
Do after market cans have this

Some do, some don't. It's all up to the manufacturer. The drains should actually drain back into the oil pan if you do it that way. Then you don't need to check it/drain it ever. I only drained mine once or twice over a period of a year and didn't really see the need to weld a bung and route a hose for a drain. Plus most 'catch' cans have a level you can read, or if you make your own you can add one yourself to it.

Andrew