Hi,

There is a lot of threads or websites FOR/AGAINST the idea of changing the stock set up effecting how PCV system functions.

The idea is on the intake side, removing inlet hose from crankcase vent to intake pipe replacing with a mini pod filter on the crankcase & plugging up the inlet on the intake.

For the PCV valve side, re-routing the hose from intake manifold to run through an oil catch can.

Understanding the claims that the above changes will helps in the long term life expectancy of an engine by preventing the fear CARBON BUILD UP..

I am making reference specifically to the 2GR-FSE motor that has multi function injection with Port & Direct injection...

Thoughts?

For or Against?

 

Eh, is it completely necessary...no. Can you do this, sure! Will it help with anything, probably not; but the health of everyone's motors are different.

 

Hmmmm...... so you are saying its selective... I am talking specifically about 2GR-FSE not any other motor... has anyone used a rerouted PCV set up long term and removed the head to see if there was minimal carbon build up?

 

I wouldn't remove it/filter it on a 350 unless it has a ton of blow-by AND you're putting a catch can on it.

The most common thing that happens is tiny filter collects grime as its saturated with oil and it plugs up. Once plugged and neglected, the engine builds pressure internally and starts leaking everywhere. If you do cap the line and add a filter, make sure it is cleaned on regular basis.

 

Very good point, how often should I be cleaning it KMs/Miles ?

I read on RR Racing website that ISF that is port/direct injection has carbon build up, so I would assume 2GR-FSE would suffer from the same thing. RR Racing recommend OCC and PCV intake deletes?

 

Every car at some point will experience carbon buildup up.

Mostly the DI 250 is worse, because no fuel is being sprayed on the backside of the valves to clean them up.

 

Thank you MikeFig.

I have just ordered an oil catch up to install.

 

People say they never changed a thing on these engines but they are wrong. Things like rings, valve springs, and valve stem seals all changed over the years. My 350 doesn't use a drop of oil in 5,000 mi so I will be the last to add a CC unless things change. That said if it doesn't use oil, no need for a CC. Though some could argue we are inducing detonation by allowing fumes into the intake path...

That said although I'll take performance over cosmetics, I'm not out after every available once of power it has to offer. Just the low hanging fruit...

 

"No" from me

 

I have had a catch can and breather setup on my IS350 for a few years just to reduce buildup. I don't seem to collect too much in it but I don't mind checking and dumping the catch can on occasion.

 

IMHO, YES I had one on my ISF, it didn't collect much, but the little bit it did means It was never part of the combustion process. I'm currently trying to figure a way to put one in my LC

Lou

 

Thank you everyone....very helpful. I agree even know the people who has fitted CC's aren't getting much, one would agree that little oil running through intake would sitting cause harm in the long run...

 

I deleted the hose and put a breather on crank case when designing my intake.

I got a check engine light indicating it running lean... it was the breather and my ecu couldn’t accommodate. When I vented the crankcase back into the intake it was fine without a check engine light.

did this back and forth many times... I’m venting into the intake, don’t this it’s a major issue. The filter on the crank case look cooler, and that’s about it.

getting a catch can is the better option, and leave the intake design.

 

where to fit the catch can? What size hoses do you use?

 

There are a few videos on Youtube covering the installation of the catch can.