M50 / M52 Single Vanos

M50 / M52 Single Vanos

Cure the noise and restore your lost power

Do you own a BMW 6 cylinder car, 1992-2006? These Vanos units have been consistently diagnosed as failing due to deteriorating piston seal O-rings. The O-rings are made of a material that is failing in the engine environment. This causes the Vanos piston seals to lose their sealing function and the Vanos unit to fail.

BMW do not provide the Vanos seals separately. They only sell rebuilt Vanos units at approx £500 + labour charges. New rebuilt Vanos units are supplied with the same, failing, inferior quality O-rings and have been found to significantly fail in 20,000 miles.

BMW Single Vanos

Vanos Seal Repair Kits are available online, they incorporate O-rings produced from upgraded material to address the failure mode and replacement Teflon seal rings.


Vanos Seal Failure Symptons

The symptoms of Vanos Seal failure are as follows:

  • Overall loss of torque and power, particularly in the lower RPM range, up to 3,000 RPM are failing; bogging then surging at 3,000 RPM.
  • Uneven power distribution and RPM transition.
  • The engine hesitates in the lower RPM range
  • Louder idle and intermittent idle RPM hiccups.
  • Difficult takeoffs.
  • Loss of power and bogging when air conditioning on.
  • Increased fuel consumption.
  • Vanos fault codes.
BMW Single Vanos
BMW Single Vanos

Vanos Seal Repair Benefits

Overall increase in torque and power, particularly in the lower RPM range below 3,000 RPM. Resolution of bogging then surging at 3,000 RPM. Smooth even distribution of power and RPM transitions. Resolution of engine hesitations in the lower RPM range. Quiet stable idle. Smooth easy takeoffs. Resolution of double vanos M52TU engine cold weather cold start idles jolts and possible stall.

Single Vanos Kits for:

  • All E36 6 Cylinder
  • E39 525i/528i
  • E39 520i/523i
  • Z3 2.8 M52
  • E34 520/525i/ix
  • E38 728i
  • All other M50 & M52 engines

Each Vanos is fully rebuilt with custom machine work to eliminate the rattling noises. High performance seals and O-rings are installed to restore lost power and increase the life of the unit. Our units are far stronger and longer lasting that standard and will take much more abuse.

Supply and Fit

We can either, recondition your unit after you have sent it to us, or supply and fit a unit, subject to stock availability.

We will come to you and fit a reconditioned unit. We complete this in a day and will include the following:

  • Full Vanos Test Before Removal
  • Fit Reconditioned Vanos
  • Cam Timing Reset
  • New Rocker Cover Gaskets
  • New Chain Tensioner Gasket
  • New Bolts & Seals for Vanos To Cylinder Head
  • Full Vanos & Road Test After Fitting
BMW Twin Vanos

If you would like to make an enquiry or require further information please contact us.