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Old May 17, 2009 | 10:17 PM
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Question NOOB Question: BOV Safe? How to?

Hello, I don't know much about the mechanics of cars. I would like to put a Blow Off Valve on my 2009 RA but I am not sure whether it is a good idea. I read a lot of pros and cons on the site but I can't find myself a straight answer. Is a BOV okay to put on the RA? Will it void my warranty? Should I use a bypass valve instead and if I do will it still make the famous BOV noise? Is installing and removing a BOV safe and easy? Can it be done by a Noob like me or should it only be done professionally? I leased my RA and I can't do anything that will void the warranty or ruin the engine. Please help me with this and I thank you all in advance for your time.
Old May 17, 2009 | 11:03 PM
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Changing anything under the hood will void the warranty with pretty much all Dealerships (if they choose to), Catback exhausts have even been known to void warranty.. And since its a lease i wouldn't recommend changing anything under the hood unless you are going to buy it out at the end of the lease.

You have a BOV already its just hard to hear with the way the tranny keeps the boost building. If you wanna hear it just go to the manual mode start cruising and wait till you hear boost building and left off the throttle. you will get the sound you are looking for.

Last edited by Jyrk; May 17, 2009 at 11:08 PM.
Old May 18, 2009 | 02:20 PM
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Wow. So much is wrong with what that guy said.

1> It is up to the dealer to decide IF a mod will void an entire warranty, and if so, they have to PROVE that part X caused damage to part Y. Even then, you can dispute the dealer's claim.

Magnuson-Moss Act

Also, you do not have a Blow-Off Valve. You have a Recirculating Valve. The Valve and cam timing keeps the turbo spooling, not the Transmission.

You can put in a BOV if you want. The downside (besides turbo spool-down) is that you will run rich when the BOV lets metered air vent. It isn't really dangerous, but it is a waste of fuel. To do that, you would need a BOV flange put in so you can run the one you want...IE> HKS etc.
Old May 18, 2009 | 02:29 PM
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Well not once did i say the tranny made the turbo keep spooling. i said "its hard to hear with the way the tranny keeps the boost building".. SINCE you are not letting off the throttle to shift. But i see you just posted to argue.
Old May 18, 2009 | 05:48 PM
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Oay I understand, so right now I have the recirculating valve. If I put a Blow Off Valve in, what am I suppose to to with the recirculating tube that will not be in use? Just let it hang there? Also, other than fuel wasting, is there any other damage that can be cause by a BOV as long as it is installed properly? Is it very easy to install and uninstall?
Old May 18, 2009 | 05:49 PM
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Nope. I posted because I wanted the guy to have the right information. You didn't add the "Since..." part until afterwards:

You said:
the tranny keeps the boost building.
which is not accurate. Why do you think I'm arguing when I'm simply giving him the correct information?

Also, a noob could do the install, yes. It is not too difficult. You may even find a "how-to" on these boards somewhere, like in the EvoX thread, or you could ask one of the tuner companies represented here like AMS.

You would cap the tube off, as it is no longer needed...but you can't just leave a gaping hole in your intake tract. Closer to the intake piping would be best, OR, if you bought a new upper intake pipe with a BOV plate already welded in place, chances are it won't have the recirc nipple on it at all.

It is, in some cases of hybrids (a BOV and a recirc valve in one), possible to install them backwards. That is a huge no-no. Other than that, if you don't seal the valve properly, you would lose boost, and possibly cause a surge (turbo spins faster than it should to make boost--which causes instability).

Last edited by Seawolf; May 18, 2009 at 05:54 PM.
Old May 18, 2009 | 06:03 PM
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Originally Posted by Seawolf
Wow. So much is wrong with what that guy said.

1> It is up to the dealer to decide IF a mod will void an entire warranty, and if so, they have to PROVE that part X caused damage to part Y. Even then, you can dispute the dealer's claim.

Magnuson-Moss Act

Also, you do not have a Blow-Off Valve. You have a Recirculating Valve. The Valve and cam timing keeps the turbo spooling, not the Transmission.

You can put in a BOV if you want. The downside (besides turbo spool-down) is that you will run rich when the BOV lets metered air vent. It isn't really dangerous, but it is a waste of fuel. To do that, you would need a BOV flange put in so you can run the one you want...IE> HKS etc.
Please do not continue to spread this false information, a lot of people fall into this trap. The dealership doesn't have to prove squat, if there is any suspicion that the part caused the problem, they can flat out deny you. If you have mods and go in with this "you have to provide evidence" mentality, you're going to be in for a big surprise. You can try to fight them all you want but unless you really know what you're talking about, you're screwed. Remember, they make the car and have an entire team of mechanics (ie. professionals) at their disposal.
Old May 18, 2009 | 06:05 PM
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Yeah I don't want to do anything to hurt the engine/turbo. Is there a certain kind of BOV I can buy that is the best and won't leak or anything? Which is the best for the '09 RA?

Also, if something was wrong, how would I be able to tell? Again, I don't want to cause anything to happen to the car that the warranty won't fix, so I want to do it right the first time.
Old May 18, 2009 | 06:06 PM
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Originally Posted by Seawolf
Nope. I posted because I wanted the guy to have the right information. You didn't add the "Since..." part until afterwards:

You said:


which is not accurate. Why do you think I'm arguing when I'm simply giving him the correct information?

Also, a noob could do the install, yes. It is not too difficult. You may even find a "how-to" on these boards somewhere, like in the EvoX thread, or you could ask one of the tuner companies represented here like AMS.

You would cap the tube off, as it is no longer needed...but you can't just leave a gaping hole in your intake tract. Closer to the intake piping would be best, OR, if you bought a new upper intake pipe with a BOV plate already welded in place, chances are it won't have the recirc nipple on it at all.

It is, in some cases of hybrids (a BOV and a recirc valve in one), possible to install them backwards. That is a huge no-no. Other than that, if you don't seal the valve properly, you would lose boost, and possibly cause a surge (turbo spins faster than it should to make boost--which causes instability).
You're talking about overboosting, I'm pretty sure turbo/compressor surge is when the air slams into the closed throttle plate and backs up into the turbo, slowing spool and possibly causing damage.
Old May 18, 2009 | 06:08 PM
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Originally Posted by redlancer3234
Yeah I don't want to do anything to hurt the engine/turbo. Is there a certain kind of BOV I can buy that is the best and won't leak or anything? Which is the best for the '09 RA?

Also, if something was wrong, how would I be able to tell? Again, I don't want to cause anything to happen to the car that the warranty won't fix, so I want to do it right the first time.
The best? The best BOV/BPV is the one which works in the situation it is required to work in. If you're stock, the stock BPV is best. It's free and it works fine.
Old May 18, 2009 | 06:10 PM
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Yes, I am stock right now, and I will be remaining stock. I just really want the pssshhh noise...
Old May 18, 2009 | 06:27 PM
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Get an intake then.
Old May 18, 2009 | 06:29 PM
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I really like the pssshhh noise the blow off valve makes. My friend has an SRT-4 and he has one and it sounds awesome. But either way, do you think it is a bad idea to get one then?

Also, where can I get an intake for this car? I need an intake like the SRI I had with my Lancer GTS. That one was very easy to put on a take off and it worked perfectly. And on top of that I picked it up on eBay for under $200 so it was affordable as well.
Old May 18, 2009 | 06:35 PM
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It's not a bad idea persay, but it's not necessary nor does it do anything performance wise. It's literally just sound.
Old May 18, 2009 | 06:39 PM
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Yes I understand. Well maybe then it is better that I get an intake instead. That way it is safer, and if anything, it will increase my horsepower.

What is the best/easiest to install/well priced intake for the '09 RA right now?


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