So I'm looking at renewing suspension bushes on my Mk2F breadvan... I'm confused over the front suspension control arm inner bush, Number 18 on this diagram.
https://volkswagen.7zap.com/en/rdw/polo+derby+vento-ind/po/1991-120/4/411-32000/
7Zap shows two versions (ignoring the G40), with different part numbers for #18
18
823 407 181
bonded rubber bush
2
HZ,2G,NZ,AAU
1W,3F,AAV,
ACM
(18)
861 407 181
bonded rub mount, adjustable
X
HZ,2G,NZ,AAU
1W,3F,AAV,
ACM
I manage to find both part numbers online
861 xxx xxx https://www.heritagepartscentre.com/uk/861407181-adjustable-front-control-arm-outer-bush.html
823 xxx xxx https://www.heritagepartscentre.com/uk/823407181-front-control-arm-outer-bush.html
and think "what the hell, I'll just order 2 of both types, that way I'm covered if I disassemble the old ones and find the car is currently using one type or the other"
Parts arrive, and the supposed 861- part, the genuine VW one, looks exactly as per the picture from the supplier but on the rubber bush itself is stamped the 823- number.
The supposed 823- part is smaller in both length and diameter, has no markings on it, and came in a bag that had BOTH part numbers on it.
Now clearly, these two parts are not interchangeable, and I'm confused. I think there's no way the smaller one could fit, but I can't tell for sure without taking the control arm off and removing (destroying) the old bushes = bad idea. The smaller one also looks less domed than it's online advert pic, so I'm not sure if it's been picked, or advertised, correctly. In addition, one of the big bushes has a chunk of its metal knurling missing, the casting or machining is defective enough to "tilt" the bush a few degrees which sounds like a bad idea for suspension components. So I'm probably going to have to return at least some of the parts.
My questions are:
i) What is a proper polo MK2F control arm inner bush supposed to look like? Any idea on dimensions?
ii) What is the difference between the two 7zap parts, what does "adjustable" mean in this sense? I thought the bush just presses into the control arm and then a bolt runs through the bush's metal tube and chassis mounts = no adjustment possible.
iii) Is the 861- part which has an "x" on 7zap defunct/superseded by the 823-?
iv) Even if I can source these bushes correctly, is it easier to just buy a whole new control arm with bushes pre-installed (I had just painted my existing CA's so had decided to just buy the bushes). My plan was to undo each bush in turn, press out with a suitable vice/screw press and tube adaptors, soap up and press in the new bushes, re-bolt to vehicle, undo other side and repeat etc. But a new CA comes with a new ball joint, might be best to refresh everything at once?
Thanks,
Bread