PART NO.  SPL.PAGE  DESCRIPTION                                                           
1H922     15.A.10   Adapter for oil pipe [Com(E)GB11298] (was 1H762)
1H922     TC.A.14   Adapter -oil filter connection -(oil.filter, engine, Twin Cam)
1H922     sup.10    Adapter -connection -filter -(oil, engine unit, sup)
1H922     16.A.10   Adapter -full flow filter connection -(oil, engine unit, 1600)
1H922     16.A.30   Adapter -full flow filter connection -(oil, engine unit, 1622)

This adapter is used at the right rear corner of engine block where the rear cross drilling brings out pressurized oil from the oil pump (after the pressure relief valve). Purpose of the long narrow tube extension is to block oil passage from the rear drilling into the main oil galley, so oil must come out into the external oil pipe routing to the oil filter. With installation of an oil cooler, this fitting connects to a flex hose running to the oil cooler, and after the cooler another flex hose going to the oil filter.

The fine thread on the outboard end is for the AN hose connector. The thread on the engine side (with the seal washer) is a BSP standard thread.

Early production cars used adapter 1H762 which does not have the extended neck between bottom mounting thread and the wrench hex. The later fitting makes it easier to use two wrenches when attaching (or detaching) the connectiong pipe or hose.

For more information on the external oil pipe and hose installatino see Engine OF-110A