Oil in intake?

[xenonkuraz]

hi guys,

was cleaning out my intake today and found old sludgey oil in there. approx a few ml? could this be due to the PCV valve not working efficiently? or maybe even broken? mind you its probably the first time in a year (since turbo install) that i've opened it up to clean it (except for the filter element) so could this just be normal oil residue build up?

[curtis265]

sounds like you've got a bit of blowby probably caused by your tarbo setup.. Have you had a compression/leakdown test recently?

[DakDak]

Nothing to be concerned about blow by is normal.

IF there was a lot different story.

[xenonkuraz]

How much would you consider a lot?

[DakDak]

http://www.ozhonda.com/forum/showthread.php?168742-Catch-Can

In the first pic that was a year of DD and one track day.

Looks a lot but its normal. 50-60ml?

I wouldnt be concerned with the few ml you stated.

I'm actually surprised thats all you got.

[curtis265]

Do you know much oil you're losing between changes? Dipstick low?

[xenonkuraz]

yeah it was about that much, lol

should i get a catch can?

I don't really lose any oil between changes

[trism]

A catch can will help to keep the intake clean.

Its worth it IMO

[xenonkuraz]

Could I possibly relocate my PCV hoses away from the intake pipe, without using a catch can?

[curtis265]

you can use a breather pod if u want..

for the ultimate badass experience. Cops won't like it though (but they won't like your turbo either lol)

[mugen_ctr]

run a catch can an plumb the catch can back into the intake if u want less trouble lol, but it will only lessen the problem, but for zero blow by in the intake, as said just run a breather pod

U can always DIY ur own catch can anyways, not that hard to make, as long as u know what ur doing, heck u can even use a coke bottle if ur that cheap LOL

But IMO, all turbo honda's should run a catch can setup, since the pcv system isnt designed for boost setup anyways

[xenonkuraz]

So then, if I was to run a sealed catch can (legal right?) it still has to be plumbed back to the intake?

I thought it was as simple as:

1. PCV to can inlet
2. can outlet to crank case

[curtis265]

PCV back into crank case wouldn't relieve any pressure

[DakDak]

PCV back into crank case wouldn't relieve any pressure

Yea it would cause in increase in pressure. Not exactly what you want when the engine is under load.

Plus there's only that one port (PCV inlet) in the crankcase for the blowby gas to get out. To get it back in crankcase only way I see is you'd need to drill a hole in your crankcase.

[curtis265]

Another people do is run an air/oil separator unit from the PCV with one hose going back into the intake, and one returning oil back to the sump... another thing to consider :)

[mugen_ctr]

How most ppl including me run our catch can setups the legal way

http://www.interaktiv.com.au/media/adrenalin/turbo/prelude-turbo-catchcan.jpg

The idea of running into the intake turbo, when under load the turbo will cause a vacuum suction, drawing any crank pressure, a.k.a slash cut

[DakDak]

How most ppl including me run our catch can setups the legal way

http://www.interaktiv.com.au/media/adrenalin/turbo/prelude-turbo-catchcan.jpg

The idea of running into the intake turbo, when under load the turbo will cause a vacuum suction, drawing any crank pressure, a.k.a slash cut

You have rep for showing me something new

[xenonkuraz]

How is the slash cut fitting done?

[mugen_ctr]

How is the slash cut fitting done?

I guess i shoulda asked firstly what engine is urs hahaha...

The above image, shows how a slash cut system is on a B/D series engines, but id imagine the same principals applies for all engines, its fairly basic, as the image implies, u require a catch can, baffled or not, i dont think it really matters, but anyways...

1 hose runs from ur pcv to catch can, another from the valve cover to catch can, an a 3rd from the catch can back into the turbo intake

And make sure u block off the port were the pcv hose use to hook up on the manifold, ensuring no vacuum leaks.

[trism]

it works that way for any engine, turbo or not.

when youre on the go pedal, there is negative pressure in the intake pipe, which sucks the blowby gasses out of the catch can, and therefore out of the rocker cover/crankcase.

in fact in some super high power cars they actually run a separate vaccum pump connected to the crank case, because negative pressure helps with power production.

[DakDak]

it works that way for any engine, turbo or not.

when youre on the go pedal, there is negative pressure in the intake pipe, which sucks the blowby gasses out of the catch can, and therefore out of the rocker cover/crankcase.

in fact in some super high power cars they actually run a separate vaccum pump connected to the crank case, because negative pressure helps with power production.

Whats the science behind this power increase? Less pressure below the piston rings in the crankcase affecting adversely affecting performance?

[connorling]

you can use a breather pod if u want..

for the ultimate badass experience. Cops won't like it though (but they won't like your turbo either lol)

breather pod only good if you always full throttle.
since at full throttle, the intake vacuum drops to zero, so the PCV isnt doing anything at full throttle.

but if it is daily, use the catch can set up.
so the PCV still works and keep the oil out of the PCV and intake.

[connorling]

How most ppl including me run our catch can setups the legal way

http://www.interaktiv.com.au/media/adrenalin/turbo/prelude-turbo-catchcan.jpg

The idea of running into the intake turbo, when under load the turbo will cause a vacuum suction, drawing any crank pressure, a.k.a slash cut

you should have the 2 outlets on the front of the engine for two reasons:
1) at acceleration, which when most blow by occur, the oil will be more toward the back of the rocker cover, therefore less oil into the catch can
2) have more space on the rocker cover, if you look at the underside of the rocker cover, you have more space to have the outlet there.

[curtis265]

Since we're on this topic... Can someone explain to me why i have 2 hoses going from the valve cover to the intake system?

One has a PCV valve toward the right of the VC going to the intake manifold
one doesn't and connects to the intake arm right before the butterfly valve


Whats the science behind this power increase? Less pressure below the piston rings in the crankcase affecting adversely affecting performance?

also would like to know

[connorling]

Since we're on this topic... Can someone explain to me why i have 2 hoses going from the valve cover to the intake system?

One has a PCV valve toward the right of the VC going to the intake manifold
one doesn't and connects to the intake arm right before the butterfly valve



also would like to know

damn i read it somewhere before and i forgot.

[Lukezen27]

I'm going with wrong size oil restrictor on your turbo

PCV systems not going push much oil anywhere

[curtis265]

if you have blow-by and your oil vaporises, it will leave oil in your intake

[Lukezen27]

if you have blow-by and your oil vaporises, it will leave oil in your intake

If you say so!