Hey, so Ive got this Volvo, that is without a BOV... its got some other device to relieve itself of excess pressure that REALLLLLYYY bogs the hell out of the car when used... BUT, a BOV CAN be installed to it... Unfortunatly, it needs to be welded to the UIP... any ideas (preferably close to Annapolis MD) on who can install such an item?

 

You can take the UICP to any shop that welds bud. It should cost any more than $45...it shouldn't....You'll just need the flange to match the bov/dv type item.
I take it the part is called a diverter valve then...or whatever else it's called.?

 

Ive got the following... some metal tube looking deal... what appears to be a rubber version of the same thing... the BOV itself and a long rubbery tube that is to connect to the diverter or something on the turbo housing itself... all it needs to do is be welded on?

 

Ok, well, that's a little more complex than I originally imagined, lol. Do you have a pic of said piping and relief valve?

 

Heres the info I could find... dont really know if this helps.
All Volvo's that are turbocharged come with a CBV (Compressor Bypass Valve). This kind of acts like a BOV. However instead of venting the excess boost to the atmosphere it vents it back into the intake track.

 

so it is a DV that is recired is all it sounds like to me

 

Which means thats prolly what it is. Being of the technical sort your opinion means a lot more than my guesses, lol. In which case, how do I go about this install, Emonz? Silver? TE?

 

So in other words, you possibly have a leaking CBV. Which you already know, lol. I just like creating long posts for typing practice, lmao.
BTW, this is why I never understood the 4g63s relief valve being called a bov..it obviously does not work the way it's name states. The 4g63s turbo system is a closed loop system too.
Sorry about my erratic thinking, but here's the meat of this post, lol.

Is this your T25? If so, this one has the CBV mounted on it. If that's what you have, you'll need that one, lol. Get the replacement diaphram for it or replace the entire turbo and replace the relief valve setup (like Mitsus). If you have a Mitsu turbo

It's going to be the same.

Now, the way the turbo, themselves, are set up, I don't see it being an issue to remove the CBV and weld the hole shut and relocate the CBV, just like the 4g63s are.
To keep it simple, just replace the diaphram bro.

..sorry if this was a confusing, hard to follow post. I've got scatter brain thoughts at the moment, lol.

Here's where I found most of this info btw.. http://www.volvoclub.org.uk/faq/EngineTurbo.html
Here's the home page of that FAQ site.. http://www.volvoclub.org.uk/hmc/hmc_faq.shtml

 

Holy ****, Silver, everything I needed to know in ONE post... damn, thanks!
For the record, I too (since I found the existance of CBVs)have questioned why Mitsu calls it a BOV when it clearly is not... its a closed system and returns the air.