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Old Apr 13, 2018 | 01:34 PM
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Default Engine movement

When I’m sitting at a red light, I can feel the car rockin’ back and forth. When I raise the hood, I see the beltt spinning and the engine rockin’ back and forth. Is this normal? I have a ‘97 automatic. I know it”s a big engine. It’s not a huge rockin’ motion but noticeable.
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Old Apr 13, 2018 | 01:58 PM
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Originally Posted by ADTvette
When I’m sitting at a red light, I can feel the car rockin’ back and forth. When I raise the hood, I see the beltt spinning and the engine rockin’ back and forth. Is this normal? I have a ‘97 automatic. I know it”s a big engine. It’s not a huge rockin’ motion but noticeable.
Thanks
With the engine running, open the hood, on the passenger side, look at your "harmonic balancer"....outside of spinning, should not be moving (much). If it is doing a wobble, you have a problem.
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Old Apr 13, 2018 | 02:10 PM
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What does the harmonic balancer look like?
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Old Apr 13, 2018 | 03:27 PM
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The lower one in this picture
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Old Apr 13, 2018 | 04:13 PM
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yes it's very common... the stock mounts don't do a very good job of keeping the engine stable which also contributes to wheelhop... put in a good set of aftermarket mounts and that will keep the engine solid
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Old Apr 13, 2018 | 04:16 PM
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Thank you everyone for your help. I will take a look the next time I drive. I don’t remember seing any movement from the part indicated. Thanks again
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Old Apr 13, 2018 | 07:34 PM
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Originally Posted by neutron82
yes it's very common... the stock mounts don't do a very good job of keeping the engine stable which also contributes to wheelhop... put in a good set of aftermarket mounts and that will keep the engine solid
I replaced mine with Hinson engine (and transmission) mounts and now very steady.
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Old Apr 13, 2018 | 07:40 PM
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Originally Posted by ADTvette
When I’m sitting at a red light, I can feel the car rockin’ back and forth. When I raise the hood, I see the beltt spinning and the engine rockin’ back and forth. Is this normal? I have a ‘97 automatic. I know it”s a big engine. It’s not a huge rockin’ motion but noticeable.
Thanks
A little bit of rocking of the engine is normal. If it is really moving a lot, the engine mounts may be bad.

Considering that your car is now 20+ years old. It may be time for a new set of mounts.

I would just stick with stock mounts. Aftermarket mounts tend to be much stiffer and will transmit more vibration to the cab and to you.
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Old Apr 13, 2018 | 09:11 PM
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my pfadt engine mounts didn't make any more noise than stock and are still doing their job after the past 7 years or so... I ran pfadt's diff mount as well and had the same results, I only removed it because I swapped in a c6 drivetrain and it wouldn't work anymore
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