Why does this happen???
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This is a discussion on Why does this happen??? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I finally got my agency power hybrid valve, i was ready to put it on and of course things go ...

  1. #1
    Registered User SubiesaurusWRX's Avatar
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    Why does this happen???

    I finally got my agency power hybrid valve, i was ready to put it on and of course things go south. I went to take one of the flange bolts off the stock diverter valve and when i noticed that there was no resistance when trying to ratchet it off its then i realized the bolt was snapped in two. So half the bolt with the head is out and the threaded half is still in the intercooler flange. A couple things that i also realized is that this means i have been driving around with only one bolt holding down my diverter valve, the new aftermarket valve doesnt even line up perfectly without both bolts being in place, and finally i don't know how to tap and drill out the rest of the bolt. I put the stock diverter valve back in place and that still lines up perfectly, so i just attached the hoses again, re-tightened the one bolt that was holding it in place and left it be. I turned on my car to see if its functional and yea it works but now i don't know by removing the stock valve from its original place, would this cause a potential leak area if i drive around. the valve seems tightly fitted and it doesn't move even with the one bolt holding it in place. But, i don't wanna risk any further damage. What is the best way to approach this situation. I already have my friend who is a subaru mechanic coming over later to try tap and drill out the rest of the bolt.
    2011 WRB WRX: DW 850 cc injectors. ProcessWest tmic. Custom SRI. GT spec header. Tsudo Turboback. Tial mv-s ewg. GFB TMS valve. Grimmspeed ebcs, crank pulley, and up-pipe. Cobb AP w/ custom tune. ACT HD clutch w/ lightweight flywheel. StopTech Club Kit ( front). Whiteline 3-pt adj. sway bars f/r. perrin front endlinks. Drag DR31 wheels 18x9 +15 offset. Nitto NeoGENS UHP all-seasons. Ultra Racing Rear Strut Bar.

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  3. #2
    Moderator Donkey's Avatar
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    If you friend is going to drill out the broken bolt then the obvious answer is to just put the stock BPV back on and return the aftermarket one.
    Resident Adviser @ WTF Tuning, LLC
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  4. #3
    Registered User wrxnguyen's Avatar
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    Not sure if I read this right, but u said the aftermarket bpv does not line up? I had the thing happen to me to. I ordered a turbosmart bpv and it didn't line up at all. I took pictures and called them about the issue. It was obviously a defect and they sent me out a new one that correctly fit. Hope that helps.

  5. #4
    Registered User SubiesaurusWRX's Avatar
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    Welll everything is all good now, both bolt holes were stripped inside the intercooler flange. My friend drill and tapped them, re-threaded the holes and we put the agency power valve on. Its a good fit now lines up on point with the stock one. I have it set to 50/50. No rpm dip no backfiring. Air to fuel ratios are actually better now ( probably cause the old valve was leaking). Car feels more responsive now. And i do build boost noticably faster. Overall good mod ( for me ) just had a bad initial scenario.
    2011 WRB WRX: DW 850 cc injectors. ProcessWest tmic. Custom SRI. GT spec header. Tsudo Turboback. Tial mv-s ewg. GFB TMS valve. Grimmspeed ebcs, crank pulley, and up-pipe. Cobb AP w/ custom tune. ACT HD clutch w/ lightweight flywheel. StopTech Club Kit ( front). Whiteline 3-pt adj. sway bars f/r. perrin front endlinks. Drag DR31 wheels 18x9 +15 offset. Nitto NeoGENS UHP all-seasons. Ultra Racing Rear Strut Bar.

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