ej25 hybrid random plug!?!?

mannyOlicious · 06-15-2008, 01:49 PM

hey guys, I have a hybrid build and this is my problem and its driving me insane. There is a hole on the block directly under the throttle body. i used to have it plugged but then I assume there was soo much pressure built up that the oil going through the oil return line got pushed back up and later blew the turbo. I got a new turbo, and what i did was take the breathers from the cylinder heads, the pcv, and this random plug and ran them into a catch can... then vented to atmosphere... THERE IS SOOO MUCH PRESSURE THAT COMES OUT OF THIS THING!!! not to mention oil.... the catch can is say about 20oz, and it was 1/3 of the way full after a 20 minute drive with minimal boost. please help me out... I believe i am having lots of blow by but I need to confirm it with a leak down test. I really dont want to spend 4k on a rebuild... Im broke!

heres the main quesion(s)
- what does this pluggy thing do?
- can i plug it up or should I route it to a catch can
- what are your thoughts on the fried rings?

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Silver Ra · 06-15-2008, 02:27 PM

so are u running a catch can now and is it hooked up to ur pcv valves ?

mannyOlicious · 06-15-2008, 03:28 PM

this is what it is... pipe from each cylinder heads, the pcv that is on the block next to the throttle body, and the pipe that is on just below the throttle body into a water bottle with a small vented hole on top... it fills up way quick

mannyOlicious · 06-15-2008, 03:34 PM

THIS DAMN THING!!! hahaa

mannyOlicious · 06-15-2008, 03:35 PM

its the little gold stub on the rear of the block, right in the middle

mannyOlicious · 06-15-2008, 03:43 PM

Dom'sGurl · 06-15-2008, 08:20 PM

you have lots of pressure on that port? Do you have any vacuum source on your crankcase at all?

Excessive crankcase pressure usually means you have a blown motor.

mannyOlicious · 06-15-2008, 08:24 PM

i was hoping blown and motor werent in the same sentence... damn thanks! haha

bluescoobywagon · 06-17-2008, 01:22 PM

I would do the leakdown test. If it comes up clean, consider running a drain from the bottom of the catch can to the oil pan. That would recirc the oil back to the pan and the can won't fill up.

NITROS · 06-17-2008, 02:12 PM

hybrid have a big problem with blow by. It is well documented, and discussed. There doesnt seem to be agood solution to the problem.

mannyOlicious · 06-17-2008, 04:45 PM

Quote:

Originally Posted by bluescoobywagon

I would do the leakdown test. If it comes up clean, consider running a drain from the bottom of the catch can to the oil pan. That would recirc the oil back to the pan and the can won't fill up.

I was thinking that same thing!

Rick539 · 06-19-2008, 03:56 AM

We tapped it and put a pipe plug in. No problems or leaks. It puts out more oil than the other vent due to it being directly over oil gallery. The other vent has an alley way the gases pass thru to get to the vent. Much easier to understand if you look at them with the block apart.

06-15-2008, 01:49 PM	#1
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	ej25 hybrid random plug!?!? hey guys, I have a hybrid build and this is my problem and its driving me insane. There is a hole on the block directly under the throttle body. i used to have it plugged but then I assume there was soo much pressure built up that the oil going through the oil return line got pushed back up and later blew the turbo. I got a new turbo, and what i did was take the breathers from the cylinder heads, the pcv, and this random plug and ran them into a catch can... then vented to atmosphere... THERE IS SOOO MUCH PRESSURE THAT COMES OUT OF THIS THING!!! not to mention oil.... the catch can is say about 20oz, and it was 1/3 of the way full after a 20 minute drive with minimal boost. please help me out... I believe i am having lots of blow by but I need to confirm it with a leak down test. I really dont want to spend 4k on a rebuild... Im broke! heres the main quesion(s) - what does this pluggy thing do? - can i plug it up or should I route it to a catch can - what are your thoughts on the fried rings? * Registered users of the site do not see these ads.

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06-15-2008, 02:27 PM	#2
Silver Ra Scooby Specialist Member#: 123143 Join Date: Aug 2006 Chapter/Region: SWIC Location: Chandler ,Az Vehicle: 03 wrx 08 forester 98civic k24/k20 02 Rsx	so are u running a catch can now and is it hooked up to ur pcv valves ?

06-15-2008, 03:28 PM	#3
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	this is what it is... pipe from each cylinder heads, the pcv that is on the block next to the throttle body, and the pipe that is on just below the throttle body into a water bottle with a small vented hole on top... it fills up way quick

06-15-2008, 03:34 PM	#4
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	THIS DAMN THING!!! hahaa

06-15-2008, 03:35 PM	#5
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	its the little gold stub on the rear of the block, right in the middle

06-15-2008, 03:43 PM	#6
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675

06-15-2008, 08:20 PM	#7
Dom'sGurl Scooby Newbie Member#: 150837 Join Date: Jun 2007 Chapter/Region: NWIC Location: Lake Stevens Vehicle: 2006 Legacy GT Blue	you have lots of pressure on that port? Do you have any vacuum source on your crankcase at all? Excessive crankcase pressure usually means you have a blown motor.

06-15-2008, 08:24 PM	#8
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	i was hoping blown and motor werent in the same sentence... damn thanks! haha

06-17-2008, 01:22 PM	#9
bluescoobywagon Scooby Specialist Member#: 14911 Join Date: Feb 2002 Chapter/Region: MWSOC Location: The land of E85 Vehicle: Not A Wagon! 2011 WRX - 285s on 18x10s	I would do the leakdown test. If it comes up clean, consider running a drain from the bottom of the catch can to the oil pan. That would recirc the oil back to the pan and the can won't fill up.

06-17-2008, 02:12 PM	#10
NITROS Scooby Specialist Member#: 41561 Join Date: Aug 2003 Chapter/Region: MWSOC Location: Chicago Vehicle: 04 GT3076 2.1 Stroker = Broken 3rd	hybrid have a big problem with blow by. It is well documented, and discussed. There doesnt seem to be agood solution to the problem.

06-19-2008, 03:56 AM	#12
Rick539 Scooby Newbie Member#: 35997 Join Date: Apr 2003	We tapped it and put a pipe plug in. No problems or leaks. It puts out more oil than the other vent due to it being directly over oil gallery. The other vent has an alley way the gases pass thru to get to the vent. Much easier to understand if you look at them with the block apart.