have a one piece configuration but preferably has a two piece design and includes an upper bushing part 30 and a lower bushing part 32 in the assembled condition the bushing parts 30 32 are clamped together between the bolted bearing parts 26 28 so that no movement of the bushing 29 is possible the bearing bushing 29 and its parts 30 32 must be positioned during the assembly in order to prevent any rotation or sliding during the installation so that a correct fit is obtained and so that an unrestricted lubricant supply is assured a relief port 54 extends radially through bushing part 30 the upper bearing part 26 is formed from a portion of the cylinder block 12 and a lubrication channel 34 extends through part 26 channel 34 extends from the wall of bore 36 to a wall 38 of the bearing part 26 which faces the cylinder 14 channel 34 has larger and smaller diameter portions forming and separated by an annular shoulder 58 channel 34 is communicated through an opening 40 with the lubricating system not shown of the 10 so that lubricant can reach the lubrication channel 34 a hollow sleeve 42 is mounted in channel 34 sleeve 42 has a central bore 43 and has a spray tip.