Suspension Torque Specs - Bushing Reset Info **LOOK HERE FIRST**
#46
Intermediate
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These folks hit the nut with an impact gun on both removal (0:23) and installation (1:53). I am not personally comfortable with that.
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JT2MA71 (01-20-21),
lobuxracer (01-20-21)
#48
Tech Info Resource
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Learned this lowering Scion tC's in 2006.
Last edited by lobuxracer; 01-20-21 at 12:57 AM.
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ChpEng (01-20-21)
#49
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#50
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Any tips for getting to the Front Upper Control arms bolts (2x 14mm)? Access to the bolt heads is difficult, and they appear to be threaded into the shock tower/body directly (?). I should have broke these bolts loose when the shocks were out...only a 36 ft-lb rating means I could have tightened them by hand after shock installation with a 6pt box end wrench. Trying to figure out if I can break them free safely with the shock installed but my breaker bar and socket won't fit.
#51
Tech Info Resource
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No tips, but for sure the bolts thread into captive nuts welded on the shock tower. I haven't fought this battle yet, so no practical advice here.
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ChpEng (02-18-21)
#52
Lead Lap
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Any tips for getting to the Front Upper Control arms bolts (2x 14mm)? Access to the bolt heads is difficult, and they appear to be threaded into the shock tower/body directly (?). I should have broke these bolts loose when the shocks were out...only a 36 ft-lb rating means I could have tightened them by hand after shock installation with a 6pt box end wrench. Trying to figure out if I can break them free safely with the shock installed but my breaker bar and socket won't fit.
Since I can do this on stock tires size 17". Depending on wheel size. Turn the the wheels full lock. Before lifting will give some access to each bolt. Full lock depending left or right bolt you're trying to remove first. If not remove the wheel all together. Just be careful if full locking wheels while car is lifted on one side. Jack may slip out.
Last edited by MikeFig82; 02-16-21 at 05:35 PM.
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ChpEng (02-18-21)
#53
Intermediate
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Tekton WRN77107 is just over 12in long.
Access to forward bolt with spring installed.
Access to rearward bolt with spring installed.
I was able to reset all the Front bushings, but not all the Rears. Access to Rear Upper #1 body side is impossible on both Right and Left, or at least it is for me on jack-stands. Also had trouble with Rear Upper #2 body side on the Left (ride height sensor harness and bracket in the way), but got it on the Right.
Proved that the OEM rubber bushing spring effect is real. There was over a 1-inch difference in droop height after resetting, both Front and Rear.
Last edited by ChpEng; 02-21-21 at 11:41 PM. Reason: fixed typo
#54
Intermediate
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My 2-wrench skills are not finely honed, and I am no mechanical genius. But I did find a good tool for this job. Tekton WRN77107 is a 12mm/14mm 6-pt racheting box head wrench with flex heads. It seems rather flimsy, but was robust enough to break loose and tighten the 36ft-lb Front UCA 14mm bolts.
Tekton WRN77107 is just over 12in long.
Access to forward bolt with spring installed.
Access to rearward bolt with spring installed.
I was able to reset all the Front bushings, but not all the Rears. Access to Rear Upper #1 body side is impossible on both Right and Left, or at least it is for me on jack-stands. Also had trouble with Rear Upper #2 body side on the Left (ride height sensor harness and bracket in the way), but got it on the Right.
Proved that the OEM rubber bushing spring effect is real. There was over a 1-inch difference in droop height after resetting, both Front and Rear.
Tekton WRN77107 is just over 12in long.
Access to forward bolt with spring installed.
Access to rearward bolt with spring installed.
I was able to reset all the Front bushings, but not all the Rears. Access to Rear Upper #1 body side is impossible on both Right and Left, or at least it is for me on jack-stands. Also had trouble with Rear Upper #2 body side on the Left (ride height sensor harness and bracket in the way), but got it on the Right.
Proved that the OEM rubber bushing spring effect is real. There was over a 1-inch difference in droop height after resetting, both Front and Rear.
Also, is it just un-tightening and then re-tightening the bolts holding the bushing in place, when ride height and/or suspension component is replaced?
#56
2008 IS250 Rear Wheel Drive
What about the torque spec for the center nut on the top of the strut shaft - front and rear? I don’t think those are in the diagrams shared previously. Thanks in advance!!
#57
Intermediate
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Lock nut should be replaced with a new one. Aftermarket nuts are often Nylock types.
https://www.clublexus.com/forums/is-...l#post10867808
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Huevotoro (12-03-22)
#59