BMW 2-valve Boxer cylinder heads – precision machining for the highest quality
Experience a comprehensive overhaul of your BMW 2-valve Boxer cylinder heads that meets the highest quality standards. Our professional machining begins with a thorough cleaning in an industrial washing machine, followed by a special ceramic blasting process that leaves a velvety, easy-to-clean surface.
Every step of this process is carried out with the utmost precision: old valve guides are removed, base bores for oversize valve guides and seat rings are precisely milled and honed to ensure an ideal fit. The components are inserted in their exact shape by heating and cooling them in liquid nitrogen, creating a particularly tight and durable connection. The final honing ensures a low-friction, smooth surface.
Using our modern Serdi valve seat processing, seat rings are individually milled based on almost 30 years of experience and specially developed contours. Finally, a vacuum test guarantees that the valves are perfectly sealed.
After the assembly of new valves, valve springs and valve cotters, your cylinder heads will be returned to you ready for installation – for optimal performance and long-lasting driving pleasure.
-Dismantle, clean and check the heads
-Blast the cylinder heads with ceramic balls.
-Remove valve guides
-Replace/shrink valve guides
-Honing valve guide to final size
-Mill valve seats to SERDI 100
-Check valve sealing with vacuum tester
-Mill cylinder heads flat on both sides (cylinder and valve cover side)
-Assemble valves, spring plates and valve springs
-Price applies per cylinder head
-Parts package included in price
Parts list (included in price):
2 valve guides
2 valves 8mm stem
4 valve wedges
2 valve springs
Note: the facing of the sealing surface to the cylinder can be booked directly with the cylinder. In this case, we recommend also machining the sealing surface to the valve cover. Often, it is this that shows a more severe distortion. If you plan the sealing surface to the cylinder with the bad valve cover side on it, you practically transfer the distortion to the cylinder side. Therefore, it is best to order the facing of both sides at the same time.
