Constant oil pressure

[David Cochrane]

Many thanks for all the helpful suggestions, and apologies for the lack of response (mainly caused by taking the RP on holiday to Norfolk last week). The next things to be done are checking the oil jets, blowing back through the oil pressure pipe, dropping the sump and checking the oil pump vanes & springs, then trying to get at the oil pressure relief ball & spring without completely removing the engine (not sure if this will be possible until I try it). The engine has a full-flow oil filter and a magnetic sump drain plug, so I think it's unlikely that there's any debris floating about. I didn't time how long it was running when testing it, but probably about 5 minutes.