Originally Posted by livermoreb
If you look at the RROCA web site, Tee One Topics, edition 84 page 1143, you will see that it says - "I found that R A Chapman of Melbourne actually have an exchange service for the units at about a quarter of the price." I suggest you contact Chapmans direct ot the authors of the article if you disagree.
I am getting more an more confused as this thread progresses. You say you have a 1981 Mulsanne, which I believe is not equipped with active ride nor gas springs in the rear. Perhaps I am mistaken.
The struts in the article you refer to are clearly those that work along with the gas springs and that are actively fed hydraulic mineral oil. I can believe that an exchange exists for that strut type, but is that what is in your car? Do you have gas spheres in the boot?
At this point it would really help to have your VIN Number or the SZ Series Shorthand Chassis Derivation
(which is just much easier to deal with).
If you go to the Flying Spares web site, 1980 - 1988 Cars, then Suspension, then Rear suspension, Rear Dampers, Standard Rear Dampers (before 1990) - you will then see Rear Damper, (before VIN 13680) (GMF 1263) at £573.35 including VAT. I think these are the ones I need.
They may be quoting for Boge, which I believe were still the OEM dampers at that time and which are astronomically expensive. Or I could be completely wrong about when the switch-over to the gas-spring struts in the back occurred. If this is the case, and that's what's in your car, then any of the information regarding Bilstein shock absorbers/dampers is completely not applicable here.
Let me know if we're talking gas springs rather than conventional dampers.
Addendum if we're talking about struts and the leak is where the return hose fits to the strut:
If the leak is between the metal union and the strut where the nylon return hose fits to the strut, then the repair is simple and permanent. Pull the union from the strut, apply a smear of Loctite 638 and push it back in. The Loctite will cure in an hour or so, and overnight will reach full strength and will never bother you again.
If you replace only the rubber concertina boot at the lower end of the strut, the thread of the union adaptor often strips in the alloy strut housing as the union adaptor fits to the strut through a hole in the boot. Loctite 638 is the cheapest and best fix possible. Retapping the strut and fitting an oversized union adaptor thread is far less satisfactory.