Hi, I'm reassembling my wm20 after an engine rebuild and noticed that the two fittings on the crankcase that connect the oil lines from the tank to the engine have a slightly different size inner diameter. Should the larger opening be on the engine return side or the oil tank return side? Any help would be greatly appreciated. Julio
Hi Julio
The fittings are 1/4" BSP and both pipes are normally the same size. If you have different sizes, put the larger one on the engine supply side since this is a lower pressure. (not engine return).
