|Originally posted by Patrick:|
I'm curious then... were the original bushings that were installed at the factory also made in this manner, so that the position of the LCA made no difference when the mounting bolts were tightened?
Bushing will self adjust to load after car is built and after.
This myth was maybe true for some cars and/or some bushings many years ago.
Is much easier, cheaper, likely safer too, to make the suspension on the factory floor. Car makers wants as few steps and few tools to make a car to save money. Many suspension bolts use "Lock Nuts" that needs a wrench. GM want full torque every time a wrench is used.
In normal travel on ok roads the bushing will act in Torsion mode and can wind up w/o issues and no wear. (Unlike Polly and others.)
Cover this in my Cave, Bushings
Big Front LCA can take a bit longer to self adjust because bushing rubber is just big.
Front upper and rear CA need to be "floating" inside the shell because if you hit big bumps etc then the small size of rubber will tear fast if they bonded the rubber. Front UCA are very small... Many time just jacking up to change tires will make UCA to float to new position a little then float to normal after.
Edit to add.... I dug thru FSM and said I wrong for OE Upper and Lower CA... Torque bolts w/ car loaded. 87SM 3C-6. Could be OE Bushing is really bonded or maybe other reasons to say this. Moog parts don't care.
I would like to find GM factory did same thing as FSM or not. Would need more info how GM made front cross member assembly. Is possible FSM have obsolete data. GM likes Copy/Past as mush as possible and often have old/wrong info. (Like 84-86 rear brakes have "wrong" drawings from another model.)
[This message has been edited by theogre (edited 04-13-2015).]