[AWD Addict]

Originally Posted by flem

It is up to the dealer to prove that the aftermarket part caused the failure/problem before they void your warranty.

that's right, however some mods are much more easily blamed for problems than others. I would put a BOV, a FMIC, and an intake into the category of more easily blamable, rather than say some new springs or an exhaust system.

Originally Posted by flem

How is a BOV a waste of money? Especially when it will come with a hard pipe to replace the upper IC pipe?

How isn't it a waste of money? It's a damned noisemaker for Christ's sake.

[ohaywood]

I really wouldn't worry about the intercooler. The BOV could cause some problems, but I really don't know about the intake, since its such a common mod on so many cars.

[RambleJ]

Does the OP have the Dinan flash? If so doesn't Dinan void their warranty if you install any other performance parts that are not Dinan?

[flem]

Originally Posted by AWD Addict

How isn't it a waste of money? It's a damned noisemaker for Christ's sake.

A BOV itself could be considered a waste of money... But when you get a hard pipe with it instead of the plastic pipe and rubber coupler BS that BMW put under the hood I do not consider it a waste...

[stimpy]

Originally Posted by flem

It is up to the dealer to prove that the aftermarket part caused the failure/problem before they void your warranty.

I love when someone makes this statement. While it may be true, that's not how the real world works.

BMW and the dealership can give your warranty the finger at any point they want. It is then up to you to file a lawsuit and prove them wrong.

[ianthegreat]

Originally Posted by SoCalTech

An intercooler also lets more air in. That's the whole reason for getting one. It cools the intake charge, making it denser, allowing more air to fill the same space, putting more air into the engine.
If your aftermarket parts cause your problem, then it's not covered. Same as if you filled up your engine with water from a hose (an yes, I've had a car towed in for that very reason). If you have an aftermarket intercooler, blow off valve, intake manifold, or other, and come in with an underboost code, we're going to charge you diagnosis to check it out. If the underboost is being caused by the aftermarket part, or the installation of that part, then you have to pay. That's only fair.

Do you actively seach for aftermarket parts as a first step? Care to enlighten us a bit?

[Octet]

My dealer dose not have an issue with aftermarket intakes, the bov I've heard
other dealers flag, the fmic, I'm unsure, though I believe that assists lowering
pressure on the turbos.

[flem]

Originally Posted by stimpy

I love when someone makes this statement. While it may be true, that's not how the real world works.

BMW and the dealership can give your warranty the finger at any point they want. It is then up to you to file a lawsuit and prove them wrong.

If they make a habit of doing this they will have a class action lawsuit on their hands

[Terrance28]

Originally Posted by flem

A BOV itself could be considered a waste of money... But when you get a hard pipe with it instead of the plastic pipe and rubber coupler BS that BMW put under the hood I do not consider it a waste...

Plus its alot stronger than the weak factory diverter valves.

[flem]

Originally Posted by Terrance28

Plus its alot stronger than the weak factory diverter valves.

exactly...

[littleyellowm3]

I have a JB2R, a custom dual cone intake, and solenoid bypass.

I brought my car into servicing for the first time after modding, and my SA and the tech basically gave me the green flag to modify my car how I want. He said BOV, IC, version 3 of JB or Vishnu (he mentioned them by name), catted dp, or exhaust is cool with them as long as I keep my end of the deal by not throwing a fit if my modifications directly cause whatever issue may arise. They even told me, because of the build date of my car, that if my fuel pump fails, they will replace it under warranty... get this, even after it expires, regardless of tunes.

PM me if you are in the midwest and would like to know what wonderful dealership this is.

[JayKay335i]

The HPFP warranty has been extended to 120k miles and 10yrs or something like that.

[RambleJ]

Originally Posted by Philritter21

I have a JB2R, a custom dual cone intake, and solenoid bypass.

I brought my car into servicing for the first time after modding, and my SA and the tech basically gave me the green flag to modify my car how I want. He said BOV, IC, version 3 of JB or Vishnu (he mentioned them by name), catted dp, or exhaust is cool with them as long as I keep my end of the deal by not throwing a fit if my modifications directly cause whatever issue may arise. They even told me, because of the build date of my car, that if my fuel pump fails, they will replace it under warranty... get this, even after it expires, regardless of tunes.

PM me if you are in the midwest and would like to know what wonderful dealership this is.

This is how the dealerships should actually be working. They should only deny a warrantied part if the mod had direct influence on that part failing.

[vegasspeed]

335i's weren't meant to run with Blow off valves. Putting one of those on your car COULD lead to problems. That is a waste of money since it adds no hp to your car and simply makes a woosh sound when shifting. The car wasn't designed with them so don't put them on the car. It is the easiest way to see if a car is modded. If you hear the whistle/woosh sound than you know something isn't right in Kansas.

As for the original question, I say any mod you do outside of Dinan will have a chance at causing some problem but this is the same for any car company. BMW just has more concerns since people are dialing up the boost to almost double the PSI and if something breaks they want BMW to fix it. Is that really fair? That's what I thought too.

[Blue Streak]

I can clearly hear the turbos spooling and the diverter valves blowing off pressure with just an intake. Why bother with a blow off valve then? I don't think it sounds much different than if it had blow off valves.

[AKbmw]

Originally Posted by Blue Streak

I can clearly hear the turbos spooling and the diverter valves blowing off pressure with just an intake. Why bother with a blow off valve then? I don't think it sounds much different than if it had blow off valves.

its just MUCH louder which some people prefer (like myself)

im on the same boat, im debating weather or not to take off my BOV to take it in to the dealership. the only reason why i dont want to take it off is because i broke the little nipple on the manifold while installing it and had the body shop fix it for me. so i really dont want to F*ck around with that nipple uninstalling it and installing it over and over again. but then again if it comes down to keeping my warrenty, i will gladly take the chance of taking it out.

[Blue Streak]

Originally Posted by AKbmw

its just MUCH louder which some people prefer (like myself)

im on the same boat, im debating weather or not to take off my BOV to take it in to the dealership. the only reason why i dont want to take it off is because i broke the little nipple on the manifold while installing it and had the body shop fix it for me. so i really dont want to F*ck around with that nipple uninstalling it and installing it over and over again. but then again if it comes down to keeping my warrenty, i will gladly take the chance of taking it out.

Well... I can see your point. I like the sound of it too, but I think I like the more subtle sound from just the diverter valves "blowing off" through the intake. I might want to just make sure that nipple thing is back to stock (or like stock) and secure, but I would put it all back to factory for any service. I hate having to replace my intake, tune and everything for simple service visits (because of the time, effort and extra beer), but I think it's got to be worth the peice of mind.

I'm even debating whether I need to remove my DAEOS (Vista) wiring harness because of the fact that the wire taps are so obvious at each of the light plugs and the that it goes into the ECU and taps into one of the wires there. It shows that I've obviously cracked open the ECU compartment and tapped into one of those highly technical, sensitive wires and they might not like that too much. I would feel comfortable leaving an aftermarket intercooler or suspension installed though.

[Former_Boosted_IS]

Originally Posted by vegasspeed

335i's weren't meant to run with Blow off valves. Putting one of those on your car COULD lead to problems. That is a waste of money since it adds no hp to your car and simply makes a woosh sound when shifting. The car wasn't designed with them so don't put them on the car. It is the easiest way to see if a car is modded. If you hear the whistle/woosh sound than you know something isn't right in Kansas.

As for the original question, I say any mod you do outside of Dinan will have a chance at causing some problem but this is the same for any car company. BMW just has more concerns since people are dialing up the boost to almost double the PSI and if something breaks they want BMW to fix it. Is that really fair? That's what I thought too.

The car was also designed to run on 255x35 rear tires, so don't put 275's back there. BMW designed the car to run on runflats that bubble constantly, so make sure you stay with them. BMW designed the car to run on a HPFP that fails on tons of cars. The bottom line is that just because the BMW came with the DVs doesn't mean putting a BOV on the car is bad. We have a T-MAP car and there is no "could" about it, a BOV cannot damage your engine. That is not an opinion, but a fact. If you don't like the sound then so be it, but please lets stop the misinformation about BOVs.

[Terrance28]

Originally Posted by vegasspeed

335i's weren't meant to run with Blow off valves. Putting one of those on your car COULD lead to problems. That is a waste of money since it adds no hp to your car and simply makes a woosh sound when shifting. The car wasn't designed with them so don't put them on the car. It is the easiest way to see if a car is modded. If you hear the whistle/woosh sound than you know something isn't right in Kansas.

As for the original question, I say any mod you do outside of Dinan will have a chance at causing some problem but this is the same for any car company. BMW just has more concerns since people are dialing up the boost to almost double the PSI and if something breaks they want BMW to fix it. Is that really fair? That's what I thought too.

I hate when people add nonsense to the forum especially when this has been discussed a million times over. A bov will not do anything to your car, it is a tmap car. The car doesn't care if its diverted in or vent to atmosphere. a BOV is just another option for the car if you want something stronger than the weak factory diverter valves and you can enjoy the whoosh. The air you are diverting back in will not help those little snails spool any faster or help in performance. A bov does not hinder performance or make the car run any worse at all so please can we knock this off.

[golfinz]

Originally Posted by Terrance28

I hate when people add nonsense to the forum especially when this has been discussed a million times over. A bov will not do anything to your car, it is a tmap car. The car doesn't care if its diverted in or vent to atmosphere. a BOV is just another option for the car if you want something stronger than the weak factory diverter valves and you can enjoy the whoosh. BMW put dv on the car for noise issues not because it was made to work only with the motor. The air you are diverting back in will not help those little snails spool any faster or help in performance. A bov does not hinder performance or make the car run any worse at all so please can we knock this off.

+1...this man speaks the troof. These crazy "bov will cause issues" thoughts go along with my theory that most* bmw owners don't know much about how cars work and bank on online forum hearsay...

[SoCalTech]

Originally Posted by ianthegreat

Do you actively seach for aftermarket parts as a first step? Care to enlighten us a bit?

Do I actively search? I'll look around if I suspect something. If you have an undeboost fault, then the obvious first step is to do a visual inspection. Any hoses blown off? Anything there that shouldn't be?

[chumley]

Originally Posted by stimpy

I love when someone makes this statement. While it may be true, that's not how the real world works.

BMW and the dealership can give your warranty the finger at any point they want. It is then up to you to file a lawsuit and prove them wrong.

Exactly right! They don't have to prove anything to you. And despite what all the fanboys think about how their mods "improve" BMW's design, I seriously doubt you would win even a lawsuit with DP's or IC, or a tune. And realistically, other than people who are students or who sit at home writing iPhone apps for a living, who has time for that? Are you really going to go to court for a <$1000 HPFP?

Originally Posted by Philritter21

I have a JB2R, a custom dual cone intake, and solenoid bypass.

I brought my car into servicing for the first time after modding, and my SA and the tech basically gave me the green flag to modify my car how I want. He said BOV, IC, version 3 of JB or Vishnu (he mentioned them by name), catted dp, or exhaust is cool with them as long as I keep my end of the deal by not throwing a fit if my modifications directly cause whatever issue may arise. They even told me, because of the build date of my car, that if my fuel pump fails, they will replace it under warranty... get this, even after it expires, regardless of tunes.

PM me if you are in the midwest and would like to know what wonderful dealership this is.

Sounds like your dealer's service department has a much more of an enthusiast's attitude - good for you. I would be aware that one SA's opinion might not grandfather you into unlimited mods should he not be there in the future or if the service manager takes a harder line on mods at some point in the future.