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Discussion Starter #1 (Edited)
This is a guide on how to fix the notorious clunking noise (Shock Knock) that is generated from the rear on 5th Gen Preludes.

BACKGROUND: The clunking noise being addressed in this guide is caused by the shock collar found at the top of each rear shock assembly. It is commonly referred to as "Shock Knock" and is experienced by nearly every 5th Gen Prelude owner. This issue was addressed by Honda and suggested repair was released as TSB 00-090. In this TSB, Honda calls for the replacement of the shock collar by a new collar that is shorter in length. I purchased these new collars for around $10/each at my local Honda Dealer. The part number can be found below. You will need two new collars (same part number). After performing these steps, I experienced zero clunking noise from the rear.

DISCLAIMER: I am in no way, shape, or form, responsible for you screwing up your car, taking it apart to a point where you can't get it back together, or burning your garage down. It is up to you to diagnose what parts are causing your noise. This guide will only remedy the issue caused by the collars. Perform this task at your own risk. If you are not comfortable working on your car, find a friend to help you, buy a friend to help you, or spend your life savings at a certified Honda dealership for them to do it for you.

BASIC INFO:
Difficulty Scale ( 1 (easy) - 10 (difficult)): 2
Time Required: 25 - 35 mins
Parts Needed: Shock Collar 52728-S30-004 (Quantity x2)
Tools Needed: 5mm Allen Wrench, 14mm Wrench, Pliers, Flat Head Screwdriver, Vise Grips, Lube/Grease

NEW SHOCK COLLAR (TOP) VS OLD SHOCK COLLAR (BOTTOM)


NEW SHOCK COLLAR


TOOLS NEEDED


LETS GET STARTED:


STEP 1: Remove your trunk liner pad. You simply just lift it out.


STEP 2: Remove the plugs holding in your trunk liner. There are three plugs on each side of the trunk. Use the flat head screwdriver to pry them out a little bit. Then grab with pliers and pull them completely out. Once all plugs have been pulled, peel back the trunk liner till it's out of the way and you have access to the top of the shock assembly.



STEP 3: Place your 5mm allen wrench in the end of the bolt and use your 14mm wrench to remove the nut. The allen wrench prevents the bolt from turning in place when loosening the nut. It may take a bit of elbow grease to get the nut off. Place the wrenches as shown in the second pic below and squeeze to break it loose.



STEP 4: Once you have removed the nut, also remove the metal washer under it. You now have access to the rubber bushing. Use your flat head screwdriver to pry the bushing up and out. Work around from all sides prying it up a little bit at a time until it pops out.




STEP 5: Once the bushing is out, you now have access to the shock collar. Use your vise grips to clamp on to it. Move it back and worth while pulling up to remove it. The only thing holding it in at this point it the lower rubber bushing.



STEP 6: Now replace everything in the order in which you removed it. Grease/Lube the new shock collar and put it onto the bolt. Then place the rubber bushing and metal washer onto the bolt. Finally, place the nut back on and tighten everything down. Repeat this same process for the other side of your car.

If you have any questions, comments, or concerns, keep them to yourself. Seriously though, let me know if you do. I'm more than willing to help.
 

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Makes sense, I have that noise when ever I go over something on a angle and a slope, like turning into driveway. Nice to know its an easy fix and cheap. Thanks for the write up.
 

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swapped mine out today but I still have the clunking noise coming from the trunk. any other idea on what could be causing this?
 

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Does anyone know if the front suspension can have the same issue as the rear or is this just an issue on the rear suspension?
 

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Does anyone know if the front suspension can have the same issue as the rear or is this just an issue on the rear suspension?
Nope, this problem only affects the rear suspension and diy guides for these have been floating around various forums since the early 2000's.
 

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why not not just cut off 1/8 of an inch off the original and save the cash. This noise is pretty loud Thinking I also have some sway bar issues. Only 88600 miles but I think age has gotten to them.
 

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Sorry for reviving a decently older thread, but I am just curious to what vgeissler said.

"why not not just cut off 1/8 of an inch off the original and save the cash."

Would that actually work. I am not really worried about saving the extra 10 bucks, but I am trying to eliminate this stupid noise and would like to find out if that's it before ordering new parts.
 

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sorry for reviving a decently older thread, but i am just curious to what vgeissler said.

"why not not just cut off 1/8 of an inch off the original and save the cash."

would that actually work. I am not really worried about saving the extra 10 bucks, but i am trying to eliminate this stupid noise and would like to find out if that's it before ordering new parts.
yep.
 

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Okay so i was performing this after work, tired, and like a dope i managed to strip the allen key hole on the left shock. Suggestions?
 

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Okay so i was performing this after work, tired, and like a dope i managed to strip the allen key hole on the left shock. Suggestions?
this happened to me when i was replacing the shock, what i did was clamp some vise grips under the dust boot onto the shock and take an impact gun to the nut. (I had the whole shock/spring out of the car so you might have to do that too)
 

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First and foremost, the DIY post is much appreciated.
But it's about 15 years late for me. I had this issue back in '01 and no one could figure out what the cause was, including of course the dealer. Allegedly, they tested on rough roads but could not reproduce the clunking sound coming from the rear passenger side strut.
I've owned the car for almost 17 years, and at 157K mi, the sound is still there but not as prominent. Maybe the collar has worn down a bit. :eek:mg:

This brings me to another question to which I cannot find an answer.
How long do the struts last on the 5th gen? All four of mine are original and I love cornering on it even more now since I have been driving a Venza more recently. :dontgetit:
 

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My 5th gen Prelude has started doing this at 150 000km. It seems to be worse on a cold morning. Some days it doesn't happen at all.

I see the revised part is only listed under the newer 5th Gen Prelude on Hondapartsnow, like the 2001 model.

I hope to fit BC coil-overs soon and assume that they come with their own top hats which will solve the problem.
 
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