: I know I need valve work soon, my 633 sounds like a deisel, but the question i have is whether I should re-build my head, or buy a rebuilt head from elsewhere? : I see that bmp design has rebuilt heads for sale, but has anyone bought one? or heard if they are decent? : any suggestions, or info on where to get one for an '82 633csi would be greatly appreciated... : cheers! : Alex Stay away from Bavarian Auto Recycling, very bad experience. Buy from local shop!