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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Car acting weird after M3 Front Control arms



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      02-03-2020, 03:42 PM   #23
Blackdog76
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New alignment sheet

Here’s the new alignment sheet. Not sure what they did to the front but I’ll get that sorted out after the new bushings are installed.
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      02-03-2020, 04:05 PM   #24
TheMidnightNarwhal
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Originally Posted by Blackdog76 View Post
Ok so back from the alignment shop and they are saying the rear was already out of spec and they can’t get it right because my rear subframe bushings are shot. I was already going to replace them anyway so not a big deal. But the more I searched similar handling issues the more tire pressure popped up. My tires are new (I decided to do M3 control arms and new tires at the same time to avoid 2 alignments). They had my rear at 45psi and my front at 38psi. I’m running m4 437m wheels so I dropped the pressures closer to m4 specs. Roughly 32 front and 38 rear. I’ll report back after my commute tonight.
I'm curious if your tire pressure affect anything. I personally run my pressures 40 front and 45 rear since I rather not crack a rim but I need to experiment this summer.
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      02-04-2020, 03:29 AM   #25
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During the one way trip to work, it already feels better with the lower pressures. Precision work’s aluminum bushings on the way.
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      02-04-2020, 09:52 AM   #26
bbnks2
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Originally Posted by Blackdog76 View Post
Here’s the new alignment sheet. Not sure what they did to the front but I’ll get that sorted out after the new bushings are installed.
You're first alignment was perfectly fine and now this sheet is all jacked up. Small tire pressure changes are not making this much impact. If something out back is loose it could be throwing off the front wheel as well (RL wheel is toed out causing the front right wheel to change slightly as well). Really can't help much at all without getting under the car and poking around. Trust that the shop actually sees a torn bushing that could be causing that much of a variance lol... Something is up with the rear left though that it swung from previous alignment of .2 toe-in to -.3* toe-out. Or, they are just trying to satisfy you with placebo affect.
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      02-05-2020, 04:04 PM   #27
Blackdog76
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The rear is definitely loose. I was able to get a lot of movement with a pry bar. The Precision Works bushings came in today. 1 piece, great quality.
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