For several years our shop Mporium BMW Service has offered a permanent solution to the failure prone plastic VANOS spring covers. Until now these components have only been available internally for our own shop's engine work and in-house customer repairs. In light of the increasing interest in vanos repairs we have decided to make our humble product available to the world.
The original adjusters have a plastic cap which serves a simple function- to cover and retain the adjuster’s coil spring. This spring helps returns the cam position to its end point when oil pressure is absent so that it may lock in place for correct startup timing. It also serves to buffer and smooth cam movement when in operation and augment adjustment performance against cam drag in timing advancement. It is important to maintain this spring’s function.
As these engines age and the original VANOS adjuster plastic caps become brittle and fall apart, this causes several critical concerns. Most obvious is the debris from the original caps falling into the oil sump and causing blockage of the oil pump pickups. In the worst cases this can cause oil starvation and engine failure. With the cap covers missing from the VANOS adjusters, the springs are no longer retained properly against the adjuster body and risk “walking” forward on their locating pins and eventually coming free. This may not always result in faults or obvious running issues but has been proven to be the cause of broken internal VANOS rotors and spring contact with the engine timing case and valve cover which results in additional metal shavings being introduced into the engine. It is critical to maintain spring retention and unfortunately these plastic caps are not available separately from BMW.
Our design is simple but unique when compared to clip-on solutions in that the "cup" is held completely captive under the VANOS’ central bolt. Completely streamlined, it is impossible for it to come loose or break apart. There are no clips to ensure are installed correctly or which might come loose. For this application, a captive design is absolutely preferable for long term reliability as it leaves no chance that the spring cover can come loose, vibrate free, or fatigue and fail as has been observed multiple times with clip-on caps. More refined than oversize washer discs, our "cup" design fully encompasses the VANOS spring in a more OE fashion. We believe our solution is the best option available for this application and is ideally installed during engine assembly or top-end work such as camshaft replacement or valve cover service.
*Customized laser engraving is also available. This is often requested if you’re installing custom cams and want the specifications engraved.
Details:- Original design only from Mporium in Texas
- CNC lathe cut from hardened Chromoly steel.
- Replaces original plastic cover AND central bolt washer.
- Does not interfere with factory internal parts or valve covers
- Inherently prone to perfect balance due to precision center bore interface with central bolt.
- Streamlined and low drag - does not leave spring parts exposed.
- Customized laser engraving is available.
NOTE: This permanent fix requires releasing the VANOS central bolts with the cams locked while at #1 TDC. Timing must be checked after installation, and we recommend considering this job during renewal or replacement of the valve covers. Luckily, the S65 is one of the easiest BMW ///M engines in which to set cam timing.
The following OEM parts must be replaced during installation:
(4) 11367840998 Central Bolt
(4) 11367839292 Vanos O-Rings
(2) 11317507432 Crush washers (at tensioners)
(2) 11127838162 Access cover gaskets
We offer this upgrade in two ways:
VANOS cups only: Four (4) cups for $379 shipped (standard/ground). Worldwide FedEx express shipping is available.
VANOS cups with install kit: Four (4) cups, + required OEM parts (listed above) for $489
USA orders can be made on our site. Worldwide Priority shipping is $50. Please email us or send me a PM and we will forward an invoice.
Order on our site:
https://mporiumbmw.com/product/vanoscups/
TOOLS:
We also offer rental of the S65 timing tools for $99 per week (7 calendar days). We have several tool sets available on a first come first serve basis. $200 tool deposit is refunded with timely return. Tool rental not available for international orders. 7 day rental period starts on day of tool delivery as verified by tracking number. Return shipment of tool must be confirmed as in the possession of shipping service via tracking by end of next business day after day 7 to avoid assessment of additional rental period and/or forfeiture of tool deposit. Tool rental includes printed and laminated instructions for engine timing/checking from BMW’s TIS documents. We do not accept any liability for incorrect use of tooling or improper installation resulting in any property damage. We do not offer technical support for installation by unqualified individuals.