[ArcticBimmer]

So I just bought a 2008 Arctic Metallic BMW 335xi about a week ago from a car auction, but I did not realize the snake-like rattle noise coming from the engine until a few days ago. The car is at 92k miles so I just missed the extended warranty on the turbos . Besides replacing the turbos or upgrading to better turbos, are there any other options for me? Maybe purchasing an extended warranty from a third party company just in case the turbos do fail?

Any info or tips would be helpful

[Jklad]

If the only symptom is rattle and they boost ok, you can redo your vacuum lines, check your boost solenoids for proper operation or replace, then try to tighten the wg arm. I would do all these before getting new turbos.

[ArcticBimmer]

Originally Posted by Jklad

If the only symptom is rattle and they boost ok, you can redo your vacuum lines, check your boost solenoids for proper operation or replace, then try to tighten the wg arm. I would do all these before getting new turbos.

The turbos seem to boost ok, the cars pulls nice even stock. Thanks for your input ill definitely look into those asap!

[Mayuri Krab]

Mine has being rattling ever since I got my mods done, I believe they were rattling already before, but the stock tune and downpipes masks the rattles very well.

Well it has being almos a year and I've since put ~16,000km on the car with them rattling away and so far no issues (got the dreaded boost too low error code at one point but that was caused by a frayed vacum line below one of the vacum can things).

Now I think the rattle gives the car character!

[amond003]

I had the dreaded wastegate rattle. I searched an found a solution that worked for me. Tightening the wastegate arm on the rear turbo fixed my issue.

[ArcticBimmer]

Originally Posted by amond003

I had the dreaded wastegate rattle. I searched an found a solution that worked for me. Tightening the wastegate arm on the rear turbo fixed my issue.

Did you do this yourself or did you have a mechanic do this?

[Jaronbwall]

Welcome to the club man. Call around your local area. I've found a few Indy shops that can fix it (a temporary fix at best) for you.
Rattling tin cans adding character?? > lol wow

[matthewo]

Originally Posted by ArcticBimmer

Did you do this yourself or did you have a mechanic do this?

Defiantly try to tighten the waste gate arm on the rear turbo before you spend any money as it will likely make it a bunch better.

It's do able from the top the first time is kinda a pain but now I can do it in like 5 minutes. The biggest thing is finding a tool to turn the arm technically it's like a 4.5-5mm wrench and it's got to only be like an 1.5" long. I made my own with a drimmel tool and a scrap piece of metal. Otherwise you use a 10mm wrench to loosen the hold down nut by turning towards the engine. Then turn the rod away to tighten till most of the slack is out. You can giggle it and it will still have a tiny bit of play in the pin connection point on the lever but still most rattle will be gone. Most people say it takes 1-2 turns.

Oh and use a light to see where you need to put your tools cause you will be working blind. And do it when car is completely cold

[ArcticBimmer]

Originally Posted by matthewo

Defiantly try to tighten the waste gate arm on the rear turbo before you spend any money as it will likely make it a bunch better.

It's do able from the top the first time is kinda a pain but now I can do it in like 5 minutes. The biggest thing is finding a tool to turn the arm technically it's like a 4.5-5mm wrench and it's got to only be like an 1.5" long. I made my own with a drimmel tool and a scrap piece of metal. Otherwise you use a 10mm wrench to loosen the hold down nut by turning towards the engine. Then turn the rod away to tighten till most of the slack is out. You can giggle it and it will still have a tiny bit of play in the pin connection point on the lever but still most rattle will be gone. Most people say it takes 1-2 turns.

Oh and use a light to see where you need to put your tools cause you will be working blind. And do it when car is completely cold

thanks ill definitely be trying this soon.. is there a DIY on this anywhere? a video or some pictures would really help as I do not know much about this car

[matthewo]

yeah there is a very long thread about it somewhere, as well as I think a video link on the thread. but I don't have the link right off hand

[Jaronbwall]

http://www.e90post.com/forums/showthread.php?t=176269

Other members have said you can't reach the front turbo but it helps immensely.
I've found Indy shops that are able to do this procedure if vacuum lines don't fix it first