Do the test I recommended and also slacken/remove the front accesory belts and listen.
More BMW problems.
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Alternator pulley freewheel clutch?
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OVERKILL
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With VANOS it is, from what I understand, often just the solenoids, not the actual units themselves, which are very robust and tend to be lifetime.
There's a service bulletin about the valve lifters in your car. BMW updated the lifters in 2008.
Here's the bulletin:
http://www.e90post.com/forums/showpost.php?p=6033662&postcount=1084
And a ton of reading from owners and their experiences.
http://www.e90post.com/forums/showthread.php?t=13504
From what I can gather people are getting their lifters replaced, and often just a whole new ( updated) head.
Here's the bulletin:
http://www.e90post.com/forums/showpost.php?p=6033662&postcount=1084
And a ton of reading from owners and their experiences.
http://www.e90post.com/forums/showthread.php?t=13504
From what I can gather people are getting their lifters replaced, and often just a whole new ( updated) head.
Good catch E365!
OVERKILL
$100 Site Donor 2021
Originally Posted By: E365
There's a service bulletin about the valve lifters in your car. BMW updated the lifters in 2008.
Here's the bulletin:
http://www.e90post.com/forums/showpost.php?p=6033662&postcount=1084
And a ton of reading from owners and their experiences.
http://www.e90post.com/forums/showthread.php?t=13504
From what I can gather people are getting their lifters replaced, and often just a whole new ( updated) head.
Great find!
There's a service bulletin about the valve lifters in your car. BMW updated the lifters in 2008.
Here's the bulletin:
http://www.e90post.com/forums/showpost.php?p=6033662&postcount=1084
And a ton of reading from owners and their experiences.
http://www.e90post.com/forums/showthread.php?t=13504
From what I can gather people are getting their lifters replaced, and often just a whole new ( updated) head.
Great find!
The valve lifter problem causes a clicking noise, not a growling noise. It goes away after you drive the car for an extended period of time which purges air out of the lifters. If you make lots of short trips, you get the clicking noise
Don't worry about revving an 'unloaded' engine to those moderate RPM.
This was always considered bad, but I have studied it and found no reason for it.m Won't hurt a thing.
This was always considered bad, but I have studied it and found no reason for it.m Won't hurt a thing.
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Did you check the alternator pulley?
Originally Posted By: mechtech2
Don't worry about revving an 'unloaded' engine to those moderate RPM.
This was always considered bad, but I have studied it and found no reason for it.m Won't hurt a thing.
I too have dispelled this rumor. One thing that could cause trouble in the past were slow reacting rev-limiters that would not react fast enough in neutral, allowing you to free-rev an engine well beyond redline. I think Ford was the first to detect an engine being revved in neutral and engage the limiter early (in the first SHO) knowing that if it waited any longer it could be too late.
Don't worry about revving an 'unloaded' engine to those moderate RPM.
This was always considered bad, but I have studied it and found no reason for it.m Won't hurt a thing.
I too have dispelled this rumor. One thing that could cause trouble in the past were slow reacting rev-limiters that would not react fast enough in neutral, allowing you to free-rev an engine well beyond redline. I think Ford was the first to detect an engine being revved in neutral and engage the limiter early (in the first SHO) knowing that if it waited any longer it could be too late.
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