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Discussion Starter · #1 · (Edited)
Ok I've been trying to adjust my BOV with the nut on the top. I'm following the proper directions. I put the sticker on top of the BOV so I know which direction is tighter or looser so no problem there. Before I used a 10mm wrench to tighten the nut b/c it wasn't tight enough. I think it worked well but I'm not sure. It would always blow-off during vacuum but it held boost fine so I wasn't too worried. Well today I decided to tighten it a bit and as I was hand tightening the nut, the nut and the thread that went into the BOV came off. The thread has two ends to it. The top side is the one that the nut screws into and has smaller threads. The other side screws into the BOV and has thicker threads. My question is how exactly does the adjustment nut and thread work? Pardon my ignorance but I just want to get this right this time.

EDIT: When I mean it blew-off during vacuum, I mean when I accelerate and didn't hit boost, it would still blow-off like the Mopar BOV.
 

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Ok,

You have an adjustment SCREW and the 10mm nut your taulkin(accent) about is a JAM nut, not to be confused with Jam on a slice of bread.

The Jam nut is there so the screw will not back out. Loosten the jam nut and tighten the screw in with a allen key. Once you have it where you want it, then tighten down the JAM nut so it makes contact with the purple surface. DO not tighten the piss out of it. IT does not need alot of tq .
 

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Discussion Starter · #3 ·
Ok now where exactly am I inserting the allen key? I think this is my problem to begin with. I've just been tightening the adjustment nut :knockhead.

Btw: I ordered my JLM Upper MM from you about 2 weeks ago. I haven't receieved it yet. Is it on back order? Thanks Hector.
 

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The allen key goes in the end of the screw. One side of the screw has an allen hex cut into it. Heres the way I adjust mine and it minimizes flutter. Loosen the SCREW until you can move it with your fingers. Now tighten it back in as tight as you can with your fingers. Make 2-4 more full turns from there. It will blow off in vacuum on the guage. When your throttle body is barely open, but you are accelerating, the turbo is spinning and building volume. Just because the guage is in the vacuum (reading is taken after the TB) doesn't mean the turbos not moving air. So when the TB closes, the turbo is spinning still and all that air has to go somewhere. If you set your BOV to tight, its going to go out the turbo and create "flutter", not the best thing for your turbo. If you set it like I suggest, it will blow off any time you accelerate and then let off the gas, even if your in vacuum. IT WILL NOT LEAK if its set like this. I have done many pressure checks on my car, and with the screw completely out of the BOV and it doesn't leak at 20PSI.
Justin
 

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Discussion Starter · #6 ·
First off let me say I'm a tool. I now know what you guys are talking about when you say adjust the screw with the allen key. I guess I never looked at it close enough. Thanks for you help.

Thanks Hector I got my JLM MM in today. Looks awesome. I'll have it in tomorrow hopefully.

Justin your UPP still looks awesome and is working well. Now if I can properly tune the Greddy BOV it will be better. I'm just going to leave it the way you said.
 

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Discussion Starter · #7 ·
Alright the BOV is working fine however I can no longer tighten it. Why you ask? Cause when I was tightening it before, I would tighten only the adjustment nut so basically I ended up stripping the threads on the BOV. The screw is fine but the threads on the BOV are done for. Now it still holds in place. I just can't tighten it anymore. Do you think I could get a machine shop to retap the BOV?
 
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