legacycentral bbs

I am building a 2.35L DOHC frankenmotor and ran into interferance between the crossover pipe form a STi and the front crankcase vent on the ej22t block.

I was thinking of plugging the vent with a freeze plug. I have had friends that did this on 2.5L STi hybrid motors and are running fine...but I'm a little more paranoid with my build.

Can deleting this vent cause any problems? I know the 2.0L WRX motors don't have this vent at all. The DOHC heads I am using only have one breather fitting on them.

It should be fine since you are using those heads.

plug it ! my first dohc motor was swallowing oil, my second motor i built is still running like a bull for 3years 25psi and beat the crap out of it, with out any problems.

sorry you mean the under alt vent right center block ? if your talking that one then yes plug it.

Yup...the one under the alternator. Good to hear there should be no problems...should clean up the clutter a bit.

i believe it's purpose is to even out crankcase pressure with the pressure in the heads. it doesnt run to the intake anywhere. take a look at the wrx and sti setup to see if the back line is the same as ours, maybe there's are different?