Is300 coilover clunking noise - Lexus IS Forum
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post #1 of 3 (permalink) Old 06-06-2019, 04:26 PM Thread Starter
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Is300 coilover clunking noise

I have a 2002 is300 and i installed coilovers about 2 months ago. The car is fairly low (ill attach a picture) and the front end makes a clunking noise when i go over bumps. After some research online it seems like its probably the upper control arms hitting the strut. I know a few other people have made posts about this issue, but i still havent found a solution. If anyone has had this problem, what did you do to fix it? Ive been recommended jzx100 upper control arms a few times, so im looking into getting those. Ive also seen a lot about RCAs fixing the issue, but im not sure what brand to get. Any suggestions?
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post #2 of 3 (permalink) Old 06-07-2019, 09:42 AM
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how long have you searched for this issue in total? be honest.

Lucy; 04 manual sportdesign
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post #3 of 3 (permalink) Old 06-07-2019, 09:54 AM
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Quote:
Originally Posted by telesto View Post
I have a 2002 is300 and i installed coilovers about 2 months ago. The car is fairly low (ill attach a picture) and the front end makes a clunking noise when i go over bumps. After some research online it seems like its probably the upper control arms hitting the strut. I know a few other people have made posts about this issue, but i still havent found a solution. If anyone has had this problem, what did you do to fix it? Ive been recommended jzx100 upper control arms a few times, so im looking into getting those. Ive also seen a lot about RCAs fixing the issue, but im not sure what brand to get. Any suggestions?
The issue, If hitting the control arm. Is how far down you are making the control arm come up closer to the coil-over. So the best way is to shorten the knuckle arm. That will take the most angle away. Longer upper control arm will also. But not as much. Same with RCA spacers. But less angle change. Be aware there will probably be some alignment issues.

That is if you want to stay that low. I would just raise it up some.

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