BMW M2/M3/M4 VANOS Problem – Aluminum Sprockets and Metal in Oil - Video

Original BMW VANOS units in N52, N55 and S55 engines have several serious weak points. One of the biggest problems is the aluminum timing sprocket, which can wear, flake and create metal particles inside the oil system.

This problem can affect many popular BMW models, including the 1 Series, 3 Series, 5 Series, 6 Series, X3, X5, Z4 and M cars. In practice, this topic is especially important for owners of cars such as BMW E60, E82, E87, E90, E91, E92, E93, F10, F20, F22, F30, F32, F80, F82, F83, F87, and also BMW M2, M3 and M4 with N52, N55 and S55 engines.

Metal flakes visible in the oil filter do not always mean bearing failure. In many cases, the source of the problem can be the original aluminum VANOS sprockets.

In this video, we show the differences between pre-facelift and facelift VANOS units, the problem with aluminum bolts, poor casting quality, worn plates, cracked rotors, and the compatibility between both versions when the correct impulse plate is used.

It is also worth mentioning that the aluminum bolt issue was serious enough for BMW to run service campaigns related to this problem. Service recall document numbers: **RCRIT-14V176-2716** and **RCRIT-14V176-8370**.

We also show the MEHENKER solution. Our VANOS units are the only ones in the world with a hardened steel timing sprocket and steel conical bolts. This eliminates two major weaknesses of the original BMW parts: the wearing aluminum sprocket and the aluminum bolts, which can loosen or break while the engine is running.

Our components are turned and milled, not simply cast. Because of that, we have much better control over dimensions, sealing and the overall quality of the whole VANOS unit. We also test our solutions regularly on special machines using hot engine oil.

In the video, we also talk about camshaft sealing rings. These rings are very important because they supply oil to the VANOS units. Worn sealing rings can cause VANOS errors even when the cam phasers themselves are working correctly. That is why it is worth checking or replacing them during VANOS repair.

If you have an S55 engine, you should also take a look at the MEHENKER crank hub. It is the strongest crank hub in the world and it does not require drilling or any other modification of the crankshaft. This is a huge advantage, because the installation is plug and play, while significantly improving timing system safety in powerful and modified S55 engines.

Always check the exact fitment before ordering or contact us if you are not sure.

???? Products from the video:

Steel VANOS cam phasers BMW N51 / N52 / N55 / S55:
https://mehenker.com/en/bmw/409-camshaft-adjusters-vanos-bmw-n51-n52-n55-s55-set-5903796606867.html

BMW N55 / S55 / M3 / M4 crank hub:
https://mehenker.com/en/bmw/337-bmw-n55-s55-crankshaft-hub-5903796606645.html

MEHENKER Motorsport 1000 HP kit – crank hub + VANOS units BMW S55 / N55:
https://mehenker.com/en/bmw/463-mehenker-zestaw-piasta-walu-kola-faz-rozrzadu-vanos-bmw-s55-n55-motorsport-1000km-5903796606638.html

BMW camshaft sealing rings N12 / N42 / N52:
https://mehenker.com/en/bmw/44-camshaft-sealing-rings-bmw-n12-n42-n52-5903796606249.html

⏱ CHAPTERS:
00:00 Aluminum VANOS sprockets in BMW
00:35 How does VANOS work?
01:15 Pre-facelift VANOS units
02:20 Facelift VANOS units
03:20 Aluminum bolts and BMW service recall
04:15 Metal flakes in the oil filter
05:00 Pre-facelift and facelift compatibility
05:45 VANOS filters in the N52 cylinder head
06:30 MEHENKER solution
07:40 Camshaft sealing rings
08:30 S55 crank hub
09:15 Summary

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???? Contact:
E-mail: [[email protected]](mailto:[email protected])
Phone: +48 733 355 555
Company: MEHENKER Manufacturing Sp. z o.o., Poland
Website: https://mehenker.com

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