Plugging the front crankcase vent....OK?

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macipusy
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Plugging the front crankcase vent....OK?

Post by macipusy »

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.
maciek puszynski

01 Impreza | v6 STi RA | 5mt | ej236t
93 Legacy Turbo | TW | 4eat | ej22t
16 WRX | 6mt | fa20
98 Legacy GT | wagon | 5mt | ej25d


2.36L Turbo - RSTi Build
ericem
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Re: Plugging the front crankcase vent....OK?

Post by ericem »

It should be fine since you are using those heads.
1993 Subaru Legacy L AWD Wagon R.I.P
1994 Subaru Legacy SS R.I.P :(
2004 Nissan Titan LE 4X4
2007 Subaru Legacy GT :)
NICO
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Re: Plugging the front crankcase vent....OK?

Post by NICO »

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.
1993 Subaru Legacy 44B STi 4Cam 16Valve Turbo Intercooled AWD
EJ22T, STi EJ207 DOHC, Vi-PEC (Spare Autronic) @ 426.20HP / 394.94ft lb @ 00psi
Tuned By: Franz Diebold ( DIEBOLD AUTOSPORT ) @ NVauto
macipusy
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Re: Plugging the front crankcase vent....OK?

Post by macipusy »

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

01 Impreza | v6 STi RA | 5mt | ej236t
93 Legacy Turbo | TW | 4eat | ej22t
16 WRX | 6mt | fa20
98 Legacy GT | wagon | 5mt | ej25d


2.36L Turbo - RSTi Build
RJ93SS
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Re: Plugging the front crankcase vent....OK?

Post by RJ93SS »

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?
93SS 04 wrx brakes/slotted w/ hawks--TD05 -- 06 I/C -- 20mm n/a fsb -- Stage 2 -- 550's -- Perrin DIV DP -- 2-3/4 Tit Exhaust -- K&N -- C/C -- A/C Delete -- Grounded -- GT Leather Interior -- WRX/STI Strut Setup -- 17" 225's -- 2 Kids Seats ;)
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