Morris Minor Owners Club

1970 morris 1098 engine.
Runs fine but....recently on tickover, a high-pitched whine (spelling?) Comes from engine.....and I cannot find it. Seems to be coming from centre line (in line with rocker cover).
When engine has warmed up sound disappears. I have tried engineers stethoscope still cannot find source of sound. I have oiled distributor including heel of points.
Any ideas.?
Garry

Try running(short period) without the fan belt. This will eliminate the water pump and dynamo or alternator, whichever is fitted.

Good idea thanks, will try tomorrow morning.
Cheers Garry

Often this can be the alternator (if it has one) when under load after starting. Goes away as the load drops.

Make sure that the fan belt is tight. If you have an alternator fitted the belt needs to be very tight. The correct tensioning should be a 8lbf applied to the belt at midway between crankshaft and alternator pulley should give a deflection of 6mm.
If it is the fan belt slipping a slight coating of talcum powder on the fan belt helps considerably.