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Old 10-06-2019, 08:03 PM   #1
Psycho
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1998 SL
Default Thumping noise in front end

I Have a thumping noise in my front end when I go over bumps I just changed out my struts on both sides its not as loud but its still there. I have new lower control arms, new outer tie rod ends, and now new strut assemblies. Only other thing I can think to change is my wheel bearing. Any ideas?
Thanks in advance

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Old 10-06-2019, 09:43 PM   #2
jpags729
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Default Re: Thumping noise in front end

Just had this issue and it turned out to be my splash shield...the retaining clip/hook part broke so I installed a new hole and fastener and that has since done the trick. I'd see if that was loose if I was you. Also check your stabilizer bar bushings and the bar itself. Good luck!

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Old 10-07-2019, 08:49 AM   #3
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Default Re: Thumping noise in front end

Could be the sway bar to engine cradle bushings. The OEM part number is 21011235 and they are only about $12 from RockAuto.

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Old 10-07-2019, 08:32 PM   #4
Psycho
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Default Re: Thumping noise in front end

@jpags 729: splash shield? Are u talking about the plastic peace under the front of the car?

Thank you all for the info I will change those check on those bushings.

Last edited by Psycho; 10-07-2019 at 08:39 PM..

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Old 10-07-2019, 09:06 PM   #5
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Default Re: Thumping noise in front end

Quote:
Originally Posted by Psycho View Post
@jpags 729: splash shield? Are u talking about the plastic peace under the front of the car?

Thank you all for the info I will change those check on those bushings.
I meant the splash shield on the sides that you see when you remove the tire. Basically the plastic cover that covers the transmission on the drivers side and on the passengers side the plastic cover that you remove when reaching for the oil filter. They hook into another plastic piece and on my the plastic hook portion broke leaving it hanging a little causing noise.

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Old 10-08-2019, 08:25 AM   #6
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Default Re: Thumping noise in front end

Drill holes and secure with black tie-wraps.

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Old 10-09-2019, 11:28 AM   #7
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Default Re: Thumping noise in front end

Quote:
Originally Posted by toggenburg View Post
Drill holes and secure with black tie-wraps.
I did that to the bumper on the drivers side

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Old 10-09-2019, 03:27 PM   #8
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Default Re: Thumping noise in front end

Check your motor mounts

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Old 10-09-2019, 04:48 PM   #9
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Default Re: Thumping noise in front end

They haven't found Jimmy Hoffa yet - so that's a possibility.....


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Old 10-09-2019, 06:01 PM   #10
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Default Re: Thumping noise in front end

Quote:
Originally Posted by onlinebiker View Post
They haven't found Jimmy Hoffa yet - so that's a possibility.....

Hoffa was in Colorado?

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Old 10-14-2019, 10:16 PM   #11
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Default Re: Thumping noise in front end

You probably need strut bearings. That's the plate on top of the spring that the strut goes through and gets the big nut screwed on the treads on top of the strut to hold it on. There's a bearing in there that allows the strut to rotate when you steer the wheels left to right and back.

This bearing "plate" then goes up in the body of the car, and has three nuts in the engine compartment that hold it up inside the wheel well. Those 3 nuts are where one bolts an aftermarket strut-tower brace to.

They should have been changed when you changed the struts. Last I checked, they were about $60 each. And you have to disassemble the strut assembly to change them!

Be diligent about your testing, and you can probably determine that you might only need one. Hit bumps / potholes with only the left front wheel, then only the right wheel. Faster / slower. See which one causes the noise, and replace that one.

My car only needed the right-side one (They're both the same).

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