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UCA Adjuster Bolts

Started by 440SE, May 15, 2025, 10:53:12 AM

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440SE

Has anyone used Moog part number K8243A as replacements for their upper control arm (UCA) concentric adjuster bolts?  I installed the QA1 UCA's and the hardware they provide are grade 3 steel that stripped out the D slot in the cams on the first adjustment. My alignment shop said every QA1 hardware kit they have worked on has the same issue.  They advised I find a grade 8 kit because it will not keep alignment with this QA1 Chinesium hardware. 

A reviewer on Summit Racing's product page for the Moog K8243A said it is grade 8 quality, but I can't find anything to confirm that. 

ec_co

I'm looking at my Moog K7030 kit and this is the eccentric bolt for it, I can't tell what grade it is though - just has the big letter P on top. Not sure if this helps or not
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avatar_ec_co @ec_co  those are grade 8.

 I have sets of nice factory cam bolts for sale.
Clean, no rust, $35 a set, plus some shipping


LoneCabbage

Quote from: ec_co on May 15, 2025, 12:59:04 PMI'm looking at my Moog K7030 kit and this is the eccentric bolt for it, I can't tell what grade it is though - just has the big letter P on top. Not sure if this helps or not

The six radial lines on the bolt head is what tells you it is a grade 8 bolt. If it were grade 5 it would only have three radial lines.

440SE

Quote from: LoneCabbage on May 16, 2025, 06:55:09 AM
Quote from: ec_co on May 15, 2025, 12:59:04 PMI'm looking at my Moog K7030 kit and this is the eccentric bolt for it, I can't tell what grade it is though - just has the big letter P on top. Not sure if this helps or not

The six radial lines on the bolt head is what tells you it is a grade 8 bolt. If it were grade 5 it would only have three radial lines.

Great, thank you for reminding me of that! I just ordered two pairs from Summit.


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