Pontiac Montana Shock Tower Clunk

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SUTHSW
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  • 1 POST
I just had the front bearings replaced in my Montana. The mechanic says that the "shock towers" were making a "clunking" noise and also need to be replaced. Well, not until he got his hands on the van! Does this sound like he may have "forgotten" to tighten everything and/or could he be looking for more business?
Jun 1, 2006 at 12:22 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Shock towers never have to be replaced. There is a bearing on top of the strut that makes some noise. Sounds like a tire store trying to sell a job.

Take it too a different mechanic not a tire or muffler shop. It is typical of their actions. Good luck
Jun 1, 2006 at 8:53 AM
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KB42
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[quote:19d1c60887="losone"]Shock towers never have to be replaced. There is a bearing on top of the strut that makes some noise. Sounds like a tire store trying to sell a job.

Take it too a different mechanic not a tire or muffler shop. It is typical of their actions. Good luck[/quote:19d1c60887]

But when he said front bearings, were those the shock tower bearings, or the wheel bearings/hubs.
You can only replace the entire hub in the wheel.
Also many aftermarket strut bearings are pure garbage. You have to make sure you get a full replacement, as I replaced them on my Grand AM and they rubbed causing the clunking noises when you turn the wheels in say a parking lot. That's because the springs are being stressed, if the bearing does not work right. Not a fun job as you have to compress the springs to disassemble the strut tower... A very dangerous task if not done properly, you can kill yourself or cause serious injury.
:shock:
Sep 16, 2007 at 5:49 PM

Suggested Repair

Shock towers themselves do not need replacement. The clunk is more likely from the upper strut bearing or mount. Have an independent mechanic, not a tire or muffler shop, inspect those parts and confirm the recent front-bearing work before authorizing more repairs.

Conversation Summary

The owner of a Pontiac Montana had the front bearings replaced and was then told the shock towers were clunking and needed replacement. The expert said shock towers are not a replaceable wear item and that the noise typically comes from the bearing on top of the strut. A second opinion from an independent mechanic was recommended rather than accepting the tire or muffler shop's additional work. Another commenter distinguished wheel hub bearings from strut bearings and noted that poor aftermarket strut bearings can also cause clunking.

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