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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 09-27-2015, 11:38 PM
poseido poseido is offline
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N62 engines, will all fail? (valve stem seals)

Hello;

I see that valve stem seals is a very common problem among 100k+ miles cars, but I wonder what percentage of the engines will eventually fail becasue of this.
I can't believe it's a 100% ratio, if so, it would be a scandal...


What's your opinion?
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  #2  
Old 09-28-2015, 07:33 AM
FredoinSF FredoinSF is offline
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My opinion is we are all sitting ducks. The VSS will eventually fail just like various gaskets and coolant pipe. Not if, but when.
It seems as though driving profile may influence the when, whereby cars that are doing mostly short commute trip fail earlier, those that regularly do long highway trips where everything comes up to temp may have an advantage.
It's just a theory, and just like my opinion it's unproven.
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  #3  
Old 09-29-2015, 03:54 AM
poseido poseido is offline
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Quote:
Originally Posted by FredoinSF View Post
My opinion is we are all sitting ducks. The VSS will eventually fail just like various gaskets and coolant pipe. Not if, but when.
It seems as though driving profile may influence the when, whereby cars that are doing mostly short commute trip fail earlier, those that regularly do long highway trips where everything comes up to temp may have an advantage.
It's just a theory, and just like my opinion it's unproven.
I appreciate your opinion.

Br
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  #4  
Old 10-23-2015, 10:03 PM
Bmwaudivwdude Bmwaudivwdude is offline
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I agree they will all fail. At first I was seeing them fail at around 140k, but now they are coming in with 70-80 miles smoking from failed valve stem seals. These engines generate a lot of heat and like all rubber it gets hard over time. My 09 BMW X5 4.8i xdrive, just started smoking with only 82K miles on it.
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Old 10-23-2015, 10:09 PM
Bmwaudivwdude Bmwaudivwdude is offline
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  #6  
Old 10-24-2015, 08:05 AM
tampamark tampamark is online now
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Quote:
Originally Posted by poseido View Post
Hello;

I see that valve stem seals is a very common problem among 100k+ miles cars, but I wonder what percentage of the engines will eventually fail becasue of this.
I can't believe it's a 100% ratio, if so, it would be a scandal...


What's your opinion?
It isn't that the engines fail, it is not operating correctly, but I have never heard of a failure due to leaky seals. I wonder if you ignore the smoking exhaust and just keep running the car what would happen? Probably nothing, just a lot of smoke and increased oil usage. If you filled it when you got the low oil error who knows. I ignored my leaking Head and Timing gaskets for a year, I had one message after 11 months to top off the oil.

It is a known design issue in this engine. The seals in all will fail eventually. So yes, it is 100%.

It is hard to tell at what mileage or time since the E63/E64 is an older model that has passed through sometimes 2, 3, 4 owners at this point. What the previous owners did or did not do, how often they changed oil, what their driving profile or environmental temperatures were, that is just unknown.
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