Talking of suspension reservoirs for the 6.9s, one item that can be of a real nuisance value is the leaking of hydraulic oil from between the tank and the body of the pressure regulator.
There is a very special jelly like type of seal that will swell and become quite inaccurate to re-install......
....
and I have on occasion taken to placing it in a freezer to reduce its size. This seal is pretty special because....because...it costs $A56.00 plus, and has to make the long journey across the seven seas from Germany. So, the price has got to be right, right ?
Anyway, you can't always wait for the Teutonic product, can you, so I went through some of the hundreds of 'O' rings, flat rubber seals, lipped seals in order to cobble up a temporary cure - it may only be that. So, I found a lip seal that fits servo pistons for some gearbox (honestly don't know which) in an effort to 'build up' the sealing surface and, so far, it seems to work.
This type of leak is not overly important, but more of nuisance value. Another tip - if for some reason you have to remove the pressure regulator, disconnect the cable from the distribution valve, remove the braket that holds the cable, move the disc to the 'M' position, disconnect distribution valve (the small square alloy unit) that is secured by two long 10 mm bolts, but DO NOT JACK UP CAR - I guarantee that you will hardly get any high pressure hydraulic leaks when you start loosening up or remopving some of the lines.
Also, if your system works well, but if there is no pressure that can be felt when moving the disc, starting the engine will restore pressure almost immediately - each and EVERY time - you should not have to rev it for God knows how long. Regards Styria
