The front radius arm to axle bolts were not very tight at all!!! (Thanks to whoever suggested that!) Could move them easily with a regular spanner! Have to use large torque wrench to tighten them. I only polybushed the vehicle a couple of months ago and they are loose already!! I replaced all the nuts and bolts with new ones at the time. I will replace them again. Still gonna put new front shocks on today anyway.
This is a popular misconception. Nyloc nuts have nothing to do with keeping a bolted joint tight - all that they do is stop the nut falling off the bolt once the joint has failed.
In a normal bolted joint the bolt is stretched and keeps all the components tightly clamped together by virtue of its elasticity (provided, of course, that the joint has been correctly designed in the first place).
Among several things that could have happened in your case are that the joint was compromised from the start by having paint/rust on the joint faces, joint faces that were not flat, holes were worn so that the already small contact areas were even smaller, lower than desirable specification for the steel material for the nuts/bolts etc., etc..
In the longer term you may find yourself having to reclaim the holes in the axle brackets so that the bush inner sleeves seat fully on one side and the nuts/bolt heads seat fully on the other. It also helps if the holes are not excessively large in relation to the bolt diameter.
AFAIK suspension and bushes nuts and bolts have to be re-tightened after a while and especially after the bushes have been installed.
Actually during the camel trophy events it was always recommended that the crews should tighten as many of the suspension and bushes bolts as possible at the end of each day.
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