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UUC Motorwerks Clutch Delay Valve delete kit BMW E39 5-Series 97-03


UUC Motorwerks

Model #UNLOCK1

Many owners of the cars listed above have noticed that they will get an excessive amount of clutch slippage and poor clutch engagement feel. This problem is most noticeable in situations calling for hard acceleration or quick shifting. The cause is an added check valve (BMW calls it a "lock valve") in the clutch hydraulic circuit that is intended to slow the engagement of the clutch as you release the pedal. This hydraulic restrictor device is intended to smooth out the feel of shifts and potentially reduce the shock load on the drivetrain. The reality is it causes a high rate of wear on the clutch and excessive heat buildup in the flywheel leading to early failure.
  • BMW E39 5-Series 1997-2003
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Vehicle Engine Notes
BMW 520d

BMW 520i

BMW 523i

BMW 525d

BMW 525i

BMW 525td

BMW 525tds

BMW 528i

BMW 530d

BMW 530i

BMW 535i

BMW 540i

What is UUC Motorwerks? UUC is the acronym for Underground Upgrade Club.

For those automotive enthusiasts who have "significant others" (wives, husbands, etc.) who do not understand the desire and need to enhance the performance of a vehicle, welcome to the club. If you ever get these kinds of questions: "Why do you need new wheels when the old ones are fine? Why do you need new suspension if the current ones aren't worn out? Isn't your current car fast enough?" - they empathize with you.

UUC stands for ultimate in quality. When they see the need for a part, it's because the offerings in the marketplace are simply not good enough. If they can make it better, they will! If they make it, you can bet it will be the best. That's they're design and manufacturing philosophy at UUC Motorwerks.

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