![]() ![]() I put little value on the additional parts. They stretch a bit, but you have to stretch and compress the new ones as well. BTW, it's usually possible to remove and reuse the sliding seals with negligible damage. But the existing part doesn't wear out, it's the o-ring underneath that stops applying pressure. The sliding seal is a semi-custom part that needs to be cut to spec. I don't think that anyone is sourcing something substantially better, and they probably aren't selling fake ones (e.g. The energizing o-rings are the part that fails. This along with our custom manufactured PTFE rings make sure that your performance is factory restored and will last the LIFETIME of the engine, not the manufacturers warranty period.I used several different types of kits over the years, from the high end to $15 eBay kits. The long term solution is to use our 'Vanos Seal Kit' to replace the OEM Buna o-rings with Viton o-rings which are more commonly found in the automotive industry and are able to withstand the environmental affects within the vanos units better. I6automotive has manufactured a cost effective solution. Louder idle, increase fuel consumption and poor cold weather starting.Īny P fault code relating to the vanos unit or exhaust valve cams. Loud ticking noises coming from the Vanos unit. There are no special tools required other than a waterpump pulley holding tool which can make life easier.however a mallet and some force can be used instead. ![]() These can be fitted by any competent mechanic or DIY- er. However both come with the same weaker buna o-rings which will lead to vanos seals failure in the near future again. It is not possible to purchase individual seals from BMW, instead they supply either brand new Vanos units or reconditioned vanos units. ![]() As the piston seals are removed the OEM o-rings can be found to be extremely hard and in some cases splitting. The OEM o-rings are made from Buna, a material that is not suitable to withstand the higher temperatures found in automotive engines. The seals over time leak oil due to deterioration with the manufacturers seals, which in turn causes the vanos unit to perform poorly and effect engine performance. Inside the vanos unit there are 2 pistons and in each piston there are four seals. The vanos unit is designed to vary the the engine intake and exhaust valve timing to help improve engine performance. ![]()
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