My subframe is aligned correct, & the tyre wear is even too. Mines 100% tempreature related, i hadn't driven the car since Monday & today went for a no where in particular drive (which i enjoyed) no squeak. The Tempreature was 12, on Monday it was 20 when they was squeaking
Ok cool, you sound like a "hands on" person like me
I may have a mod for you and existing owners to try.
I'm not aware of the evolutionary changes that have got this Bush to Mk4, but I've attached a couple of pictures to backup my claims that its the caster adjustment causing the biggest problem here, and now also the bush shoulder.
Please don't think this is a criticism though, I can see PowerFlex have been behind solving this problem for some time now which is great, and the work that Craig has put into the re greasing solution is ingenious! Did anyone notice the ribbed crisscrossing in side the bush, that's to help contain the grease a well thought out design I like.
So below are a couple of pictures of a top arm wishbone with adjustable bushes, one original pic and one I've drawn all over so a comparison can be seen better.
In the picture below you would expect to see a straight line between bolt and arm casting as would be the case with the std rubber bush.
Look at the red and yellow lines, they are both running off square, this is caused by the caster adjustment and opposing directions from the two adjuster (which is unavoidable when adjusting for camber and
This angling of the bush could also be causing the grease to be pushed out prematurely, its just like squeezing on the end of a toothpaste tube.
So look at the green arrow, this shows one of the pinch point where you would get stiction, this could well be the main contributor to the squeaking.
So what solutions are there?
1) Well as above posts, run the bushes square and adjust for camber and shim for caster, but that's old news now.
2) What I have noticed is that shoulder and pinch point highlighted with green arrow.
It would be nice to see that shoulder taper off, this may allow the arm to remain skewed and not squeek, but I know that's a bold statement as there have been many methods tried to date. See blue lines for revision.