Usage Tips:For V8 M62TU M62 VANOS New Auto Seals Repair/Upgrade Kit Range For V8 621-126026 WalkbeeThe vanos unit is designed to vary the the engine intake and exhaust valve timing to help improve engine performance. Inside the vanos unit there are 2 pistons and in each piston there are four seals. 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. The o-rings are made from Buna, a material that is not suitable to withstand the higher temperatures found in engines. As the piston seals are removed the o-rings can be found to be extremely hard and in some cases splitting. It is not possible to purchase individual seals from , instead they supply either Vanos units or reconditioned vanos units. Both come with the same weaker buna o-rings, which will lead to repeated vanos seal failure. Our kit can be fitted by any competent mechanic or DIY- er. There are no special tools required other than our waterpump pulley tool. Cam locking tool aren't required. Solution Material:rubber colour:black Package Contents: 10 * Seal ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.