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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 05-04-2008, 11:07 AM   #1
180ways2slide
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SR oil leaking everywhere

this is my problem i have a built sr20det w/t3/t4 top mount turbo, my question is y does the breather on the side of the valve cover piss out so much oil each time i get on the car. is a oil catch something i def need or is there another option i have oil everywhere. also the dipstick pops out once in a while. suggestions and help is all im asking
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Old 05-04-2008, 11:10 AM   #2
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hmm not sure about the breather but alot of evo guys put a spring on the dipstick to prevent it from popping out
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Old 05-04-2008, 11:13 AM   #3
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hmm not sure about the breather but alot of evo guys put a spring on the dipstick to prevent it from popping out
not the same thing. To answere the question. it sounds like blow by. and from what i understand alot of blow by isnt good.
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Old 05-04-2008, 11:15 AM   #4
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what exactly is blowby and what damage does it do
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Old 05-04-2008, 11:17 AM   #5
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Is your car smoking at all? You shouldn't have that much blow by. I rebuilt my motor and have ZERO blow by. I have a catch can just incase though.
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Old 05-04-2008, 11:20 AM   #6
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Worn out rings = blow by.
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Old 05-04-2008, 11:23 AM   #7
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Worn out rings = blow by.
Bingo...... Check your compression and post your results
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Old 05-04-2008, 11:23 AM   #8
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Ughhhh a picture of the setup would help.

Something isn't venting the pressure.. aka the PCV valve is probably stuck.. that is if you haven't deleted it. Post pics of engine bay.

All that pressure in your engine will quite literally blow out EVERY SINGLE SEAL, if left unfixed. I'm talking about front main, rear main, valve seals, etc. Stop driving until you figure it out.

Adding an oil catch can won't reduce the insane pressure you have in the motor. Not too much shit is really supposed to go through there...

My rec? Post pics, replace PCV with genuine nissan one for now. There might be something hooked up wrong with turbo system. Maybe you need a restrictor, or need to take one out? Hmm.

Dip stick pops out because of boost. That's one boost leak right there =(. Pressure test your system. Replace oring.

-Bart
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Old 05-04-2008, 12:08 PM   #9
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is the dipstick pops out. rings are fckn bad...time for rebuild.
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Old 05-04-2008, 12:13 PM   #10
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I'll try to get pics up but no the car does not smoke and the oil only blows out at boost. My oil pressure doenst even get higher then usual but I'm not sure I have restrictors in turbo lines I guess I have to check. Thanks for the info
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Old 05-04-2008, 04:01 PM   #11
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is the dipstick pops out. rings are fckn bad...time for rebuild.
motor has 5k on it and since i installed microtech less then 50 miles so i dont think motor needs rebuild but i will check everything
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