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Old 06-15-2008, 01:49 PM   #1
mannyOlicious
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Unhappy 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?
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Old 06-15-2008, 02:27 PM   #2
Silver Ra
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so are u running a catch can now and is it hooked up to ur pcv valves ?
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Old 06-15-2008, 03:28 PM   #3
mannyOlicious
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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
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Old 06-15-2008, 03:34 PM   #4
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THIS DAMN THING!!! hahaa
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Old 06-15-2008, 03:35 PM   #5
mannyOlicious
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its the little gold stub on the rear of the block, right in the middle
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Old 06-15-2008, 03:43 PM   #6
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Old 06-15-2008, 08:20 PM   #7
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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.
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Old 06-15-2008, 08:24 PM   #8
mannyOlicious
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i was hoping blown and motor werent in the same sentence... damn thanks! haha
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Old 06-17-2008, 01:22 PM   #9
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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.
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Old 06-17-2008, 02:12 PM   #10
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hybrid have a big problem with blow by. It is well documented, and discussed. There doesnt seem to be agood solution to the problem.
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Old 06-17-2008, 04:45 PM   #11
mannyOlicious
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Quote:
Originally Posted by bluescoobywagon View Post
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!
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Old 06-19-2008, 03:56 AM   #12
Rick539
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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.
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