A65 1967 how to replace oil tubing.

[limeyrob]

Has it ever been OK since you owned it?  I ask because I once had a similar problem and it was an faulty oil pump.  It had been fitted with one of the gears missing!.  Unlikely in your case but if this failure to return persists it will be worth taking the pump off and checking the gasket, oil ways and anti sumping ballan and spring as its behind the pump 

[LIONELSMITH]

Latest
I have re-routed the return oil pipe and am getting good oil return to the tank. Having solved that the oil is coming out of the rocker box union. The new pipe is a little tight on length now, so if I cannot re-route I will replace. I am using 1/4" tubing is that about right? I also intend to lift the rocker cover to see if there any blockages inside.
Hopefully, I can still avoid stripping the timing side.

[rhyatt]

The rockers are fed from the return side pipe , the pipe that squirms in the oil tank.
This pipe has a T junction that takes some oil to the rockers.
Slacken the banjo nuts that hold the oil pipe to the rockers and see if you get oil weeping when the engine is running.
If so lock it up and forget it.

[Ian C]

Slacken the banjo nuts that hold the oil pipe to the rockers and see if you get oil weeping when the engine is running.
If so lock it up and forget it.

Not on any A65 I've dealt with 
To Lionel.. The oil feed to the head for the rockers should have a drilling all way through to the pushrod tunnel with a split pin fitted to help regulate oil feed to rocker shafts.

[rhyatt]

apologies, I was thinking of my C15 rocker feed