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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 06-20-2009, 02:30 AM   #1 (permalink)
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Unhappy Flat spot while in First Gear

Hi Guys,
I have just had over 700 worth of work done on my 528i, and now the car is running fantastic apart from one problem that is really niggling me.
When i pull away in first for about a minute there is a loss of power and then the car picks up and is absolutely fine.
Is this a common problem or am i looking at another major bill coming up

Any Thoughts or ideas would be much appreciated.
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Old 06-20-2009, 06:21 AM   #2 (permalink)
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Assuming you have a munual shift, you're experiencing clutch delay. BMW engineers installed a clutch delay valve (CDV) between the line directly before the slave cylinder. What this does is allow the same amount of pressure to engage the clutch no matter how hard you to shift. This was designed to detour shock to the drive train from novice drivers. The CDV can easily be removed in a matter of minutes with no addition parts or modifications. There are many DIYs explaining in detail on the removal. The only tools needed aside from ramps or jack stands are an 11mm crows foot wrench and a 14mm open end wrench. Once the CDV is removed and your traction control is turned off, your car will go through gears like a normal car would. I drive a 540i/6 and can chirp the wheels trough 3rd (not recommended) but good to no I can. PM me and I can explain the removal of the CDV without having to bleed the system. Took me 7 minutes flat.
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