power steering 'stop leak' products in the hood hydraulic system?

[Chris from Wales]

Good evening everyone. This evening I tried to top up the hydraulic reservoir with Lucas Oil Hydraulic Oil Booster Stop Leak. The Lucas additive is very thick and did would not easily feed through the filler hole. I managed to get about 20ml in but I’d need to get more like 75ml in to reach the desired 10% ratio with the hydraulic fluid in the system.

Any tips / ideas? Is there a breather bolt to undo as well as the filler bolt?

I’m thinking that I’ll wait for the level to drop again then pre-dilute the Lucas additive with the correct hydraulic fluid.