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Discussion Starter #1
Ok,

This is the next observation from my tear down of the recently built suspension to fix issues. I know this has probably been gone over loads of times but I did find it difficult to get answers regarding the difference in the top arms between the 2.0 and 3.0 versions and probably answers why around 12 years ago when I had a specialist replace my old bushes fro powerflex I suddenly had excessive camber around -4 degrees both sides.

I has suspected this for a long time but couldn't get a definitive answer on the difference between the two arms but hopefully the photo below explains.

As you can see there appears to be no difference in the main casting or the bolt on ball joint but the old one I removed had the holes drilled square in the middle of the flat and the brand new 3.0 version has the hole drilled around 4.5mm off center towards the outside lengthening the complete piece.

I know other owners have slotted these arms to reduce the camber but it's nice to know the root cause. I suspect there's a few cars out there in the same position as mine.

It is difficult to comprehend how much difference this actually makes to camber. I haven't had it 4 wheel aligned yet but is visibly different and looking what I would consider normal for these cars. I will report back with the actual figures once I get it aligned properly.

One other thing to note... on the old arms we replaced the bushes for Powerflex.. these were the black ones which were the only ones available.. I have suspected that something was binding in the setup which was stopping the suspension from settling in the correct position and this case lower than normal (33.5cm) from the center of the wheel to the lip of the arch. There was a real fight to get the arms out of the subframe and in our opinion this was overly tight, not normal and probably contributing to the ride height being lower. When the new arms were fitted with original bushings the ride height is now 36.5cm from the center of the wheel to the arch lip.

cheers
 

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Good work, thanks for posting the results. That's a big change in the ride height.

My car has quite a lot of negative camber judging by look alone. I haven't had it checked yet but will get round to it in the spring and your observations will be very helpful if I need to change anything.

As I don't have spares to compare with, could you post the measurement of one of those holes from the end of the arm?
 

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Discussion Starter #3
Good work, thanks for posting the results. That's a big change in the ride height.

My car has quite a lot of negative camber judging by look alone. I haven't had it checked yet but will get round to it in the spring and your observations will be very helpful if I need to change anything.

As I don't have spares to compare with, could you post the measurement of one of those holes from the end of the arm?
anglospider, yeah no worries, I'll only be able to measure the so called 2.0L version which is obviously off the car now.. if you look closely at the photo the 2.0L arm it looks to be drilled in the center of the oval flat, the brand new 3.0 version is off center towards the ball joint end 4.5mm from the center of the flat.. I think the only way to tell is with that ball joint off the arm..
 
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