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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Turbo?



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      04-11-2013, 05:57 PM   #1
jims335i
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Turbo?

I know some people have had issues with their stock turbos failing. Is this hit or miss with these cars, or is there a cause? Also is there anything that can be done as to prevent this? When you start to have bad wastgate rattle, is that the sign that the turbos are on there way out?
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      04-11-2013, 06:26 PM   #2
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It's the luck of the cards.
Warming up your oil before going WOT can help.

Wastegate rattle is not a direct indication of turbo failure as the wastegates can rattle can occur way before your turbo's are failing.

Blue smoke, loss power, loss of oil, are some ways of determining turbo failure.
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      04-11-2013, 06:54 PM   #3
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You'll know when your turbos are on the way out, they'll respond poorly, won't hold boost well, and will blow by gobs of oil. As Jeff said, WG rattle is independent of the turbo's overall condition. Plenty of people here have rattle but the snails still hit their targets fine.
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      04-11-2013, 07:21 PM   #4
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Quote:
Originally Posted by jims335i View Post
I know some people have had issues with their stock turbos failing. Is this hit or miss with these cars, or is there a cause? Also is there anything that can be done as to prevent this? When you start to have bad wastgate rattle, is that the sign that the turbos are on there way out?
104K miles, 10/06 build, original turbos, been tuned since 40K, been boosting 18lbs plus (8lbs stock), for the last 20K miles, absolutely positively, no issues. I bought a spare set of oems, years ago, because i was positive, that by now, the oem snails would have failed. Boy was I wrong. It's all about how you maintain your vehicle.
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      04-11-2013, 07:54 PM   #5
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Quote:
Originally Posted by jims335i View Post
I know some people have had issues with their stock turbos failing. Is this hit or miss with these cars, or is there a cause? Also is there anything that can be done as to prevent this? When you start to have bad wastgate rattle, is that the sign that the turbos are on there way out?
you may find this interesting, even if you are not covered under this extension. Good information from others.

http://www.e90post.com/forums/showthread.php?t=729833

BUT Check to see if your state is covered under this.

just had my wastegates replace by dealer due to bad rattle, no questions asked.
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      04-11-2013, 10:08 PM   #6
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good info guys thanks!
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      04-12-2013, 12:13 AM   #7
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crap my exhaust is starting to rattle when i start my car. Is this something to worry about? I believe its my left side (looking from the rear)
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      04-12-2013, 08:26 AM   #8
jims335i
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Originally Posted by swickings View Post
crap my exhaust is starting to rattle when i start my car. Is this something to worry about? I believe its my left side (looking from the rear)
I think it could just be the exhaust flap rattling. It should be no big deal.
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      04-12-2013, 08:44 AM   #9
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Quote:
Originally Posted by jims335i
Quote:
Originally Posted by swickings View Post
crap my exhaust is starting to rattle when i start my car. Is this something to worry about? I believe its my left side (looking from the rear)
I think it could just be the exhaust flap rattling. It should be no big deal.
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      04-15-2013, 01:04 AM   #10
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Bad Turbos at 72K miles

My turbos on my 2007 335i have gone out at under 72K miles. The wastegates did not fail (so it's not covered under the BMW warranty), the turbos are leaking oil out the exhaust. The oil has puked out so bad that the O2 sensors and cats are completely soaked and also need to be replaced. I bought the car over 2 years ago with about 46K miles and had it serviced at the dealer until the maintenance warranty expired. Since then, it has been kept serviced on schedule. I don't race the car (at a track), I just enjoy having fun on country roads.

The dealer quote to fix the turbos and replace the exhaust is $7900. Ouch! A non-dealer German auto repair shop's quote is nearly the same.

This isn't the only issue that this car has had. The water pump failed at 60K miles and cost $1000 to replace. And the $1000 performance tires wore excessively on the insides of the tires in just one year (12K miles). This car has been just the opposite of my 2002 E46 325xi, which has been so rock solid and easy to maintain that I gave it to my daughter when she went to college. My E90 days are limited.
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      04-15-2013, 02:50 PM   #11
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I just called my local bmw dealer.
service said that just rattle doesnt constitute turbo replacement.
Wtf. It only happens once every two or three times i start my car.
But when it does. It sounds sooo shitty.
Does anyone know what makes it come and go?
I was all happy thinkin i was gonna get new turbos and this service individual kinda just discouraged me alot
They said it has to be losing boost as well.

If so, should I go to another place to get my boost levels checked rather than the stealership? So atleast Ill have an idea going into them trying to get new ones.

Any help would be phenomenal.
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