[Healeys] tensioner oil supply

[john spaur]

The new Rolon (Country brand) tensioner has a tiny oil supply hole 
that I presume provides hydraulic oil pressure to the spring loaded 
part that presses against the timing chain. The oil supply hole is 
much smaller than the original part.

Does the tensioner work on hydraulic and spring pressure?

Should the oil supply hole be enlarged to match the original?

Thank you,
John Spaur
BT7