18-02-2019, 09:26 PM
Hi Charles,
Vintage engine rather than PVT I take it. Mag engine ?
I suspect your build is like my current engine 1934.
It is still worth putting a metering orfice into the camshaft feed and either making a new bearing without the oil groove or tinning it and filling it with solder, oil will still find its way to the cam drive gears.
I have made a brass reducing bush which is an interference fit it has a 1.5 mm drilling for the oil feed to the camshaft.
If you look inside the camshaft bearing housing on a lot of crankcases you will see where the oil has scoured the alloy away from the oil feed drilling.
The external O rings stop oil from going round the outside of the camshaft bearing ( I suspect you will still have oil at about 60 to 80 PSI )
What feed are you using to the crankshaft nose ?
Brass bush type or lip seal type ?
The brass bush type will help feed oil to the timing cover and lubricate the gears.
Vintage engine rather than PVT I take it. Mag engine ?
I suspect your build is like my current engine 1934.
It is still worth putting a metering orfice into the camshaft feed and either making a new bearing without the oil groove or tinning it and filling it with solder, oil will still find its way to the cam drive gears.
I have made a brass reducing bush which is an interference fit it has a 1.5 mm drilling for the oil feed to the camshaft.
If you look inside the camshaft bearing housing on a lot of crankcases you will see where the oil has scoured the alloy away from the oil feed drilling.
The external O rings stop oil from going round the outside of the camshaft bearing ( I suspect you will still have oil at about 60 to 80 PSI )
What feed are you using to the crankshaft nose ?
Brass bush type or lip seal type ?
The brass bush type will help feed oil to the timing cover and lubricate the gears.