 Rear suspension knock., Searching wasn't helpful. |
 Jul 1, 2012 - 2:54 PM
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 Moderator  Joined Jun 29, '08 From Denver Currently Offline Reputation: 59 (100%)  |
I recently installed TRD coilovers on the Celica to replace the aged stock suspension. The struts weren't totally blown but they weren't great and the springs had to have helper blocks in them, but they were quiet. After lowering, we found that the rear started knocking quite badly. Based on recent threads, I replaced the rear sway bushings with 16 mm with Energy Suspension bushings and the end links with Racing Beat Miata end links. While this cut the knocking down by half, there is still a persistent knock. It only happens at low speeds and seems to be from the right side more than the left, but it isn't strictly on one side or the other. All nuts and bolts have been checked and are confirmed to be tight.
When I searched, the only potential suspects I can find are trailing or control arms or the exhaust hitting the car. I don't believe it's the exhaust since it only happens at low speeds and I've followed the Celica and the exhaust seems stationary. So what are the odds that I need new rear bushings and it didn't become apparent until I was lowered? Anything else I should check? Any help or advice is greatly appreciated. By the way, I'm intending to replace my rear bushings anyway, I just haven't done it yet. Procrastination is terrible. -------------------- "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others labored hard for." -Socrates. Even Socrates told us to use the search button!
 2006 Aston Martin V8 Vantage. 1998 Celica GT- BEAMS Swapped. 2022 4Runner TRD Off Road Prenium. 2021 GMC Sierra AT4. |
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Aug 25, 2012 - 2:08 PM
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Moderator Joined Jun 29, '08 From Denver Currently Offline Reputation: 59 (100%) |
Syaoran, that sounds like sway bar bushings to me. I've seen quite a few posts where people heavy a mystery knock and the bushings look good, but the sound went away with new bushings.
I suppose I could update my particular problem. The sound has mostly disappeared from the right side of the car and now primarily comes from the left. I can't replicate it at all. It's still the same noise but it's getting louder. I'll probably be selling the TRD coilovers soon in lieu of something softer, and I'm tempted to put the stock suspension back in just to see if anything changes. The struts definitely are not blown, nothing seems to be wrong with the coils, but all signs are pointing to the coilovers themselves being the culprit. I just find it odd that when I hit a bump, I get the one big thunk that is to be expected then I get three or four light knocks. -------------------- "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others labored hard for." -Socrates. Even Socrates told us to use the search button!
2006 Aston Martin V8 Vantage. 1998 Celica GT- BEAMS Swapped. 2022 4Runner TRD Off Road Prenium. 2021 GMC Sierra AT4. |
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Aug 25, 2012 - 2:47 PM
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 Enthusiast Joined Jan 4, '12 From US Currently Offline Reputation: 6 (100%) |
QUOTE (richee3 @ Aug 25, 2012 - 3:08 PM)  Syaoran, that sounds like sway bar bushings to me. I've seen quite a few posts where people heavy a mystery knock and the bushings look good, but the sound went away with new bushings. I suppose I could update my particular problem. The sound has mostly disappeared from the right side of the car and now primarily comes from the left. I can't replicate it at all. It's still the same noise but it's getting louder. I'll probably be selling the TRD coilovers soon in lieu of something softer, and I'm tempted to put the stock suspension back in just to see if anything changes. The struts definitely are not blown, nothing seems to be wrong with the coils, but all signs are pointing to the coilovers themselves being the culprit. I just find it odd that when I hit a bump, I get the one big thunk that is to be expected then I get three or four light knocks. I'll look into that, since they're easy to replace. I'm guessing any sway bar bushing as long as they're 16mm will work right? Or is that the wrong size? Kinda odd that your issue might be coils... being TRD and all... -------------------- 1993 Celica GT Coupe - sold
1994 Celica GT Liftback |
Posts in this topic
richee3 Rear suspension knock. Jul 1, 2012 - 2:54 PM
lagos It could be caused by your upper strut mounts. Whe... Jul 1, 2012 - 3:00 PM richee3 Thanks Art! I'll check into it. I just tho... Jul 1, 2012 - 5:25 PM trdproven retorque all nuts/bolts, check your sway bar bushi... Jul 1, 2012 - 5:28 PM richee3 So far, no luck. I haven't been able to replic... Jul 10, 2012 - 12:31 PM trdproven are the bump stops gone or are you bottoming out a... Jul 10, 2012 - 8:32 PM
richee3 QUOTE (trdproven @ Jul 10, 2012 - 8... Jul 10, 2012 - 9:06 PM trdproven did you remove the coilovers or just adjusted it? ... Jul 10, 2012 - 10:33 PM RabidTRD Ok if you figure this out, I really need to know. ... Jul 11, 2012 - 2:12 AM Galcobar Symptoms sound quite familiar.
Worn-out bushing i... Jul 11, 2012 - 4:43 AM richee3 ^^ Thanks! I'll have to test that next wee... Jul 11, 2012 - 10:51 AM trdproven seen that diagram to replace those bushings and ar... Jul 11, 2012 - 5:57 PM azian_advanced that's the diagram i made a while back. i not... Jul 11, 2012 - 8:22 PM richee3 QUOTE (azian_advanced @ Jul 11, 2012 - 8... Jul 11, 2012 - 8:46 PM Galcobar The problem's actually fairly common. It spark... Jul 11, 2012 - 11:32 PM richee3 Thanks guys. I've got some stuff to test for s... Jul 12, 2012 - 3:04 PM jordisonjr ^ Yea those bolts also look like a royal pain to g... Jul 12, 2012 - 4:04 PM richee3 bloodMoney has a set of rear suspension bushings t... Jul 13, 2012 - 2:55 PM jordisonjr If you're dropping the gas tank, and are looki... Jul 13, 2012 - 3:21 PM azian_advanced i got somebody else to remove the one bushing on t... Jul 13, 2012 - 5:04 PM richee3 QUOTE (jordisonjr @ Jul 13, 2012 - 3... Jul 13, 2012 - 5:49 PM trdproven the one I am trying to get over, which is for many... Jul 14, 2012 - 7:03 AM Galcobar If the pop is due to the arm binding, there are tw... Jul 14, 2012 - 1:32 PM trdproven makes sense, would the bind be more likely due to ... Jul 14, 2012 - 5:54 PM Galcobar The suspension arm would bind because the bushing ... Jul 15, 2012 - 4:35 PM trdproven i might have to get to this point one day, cus i k... Jul 15, 2012 - 11:08 PM richee3 Little update, I've got the bushings now, so I... Jul 26, 2012 - 3:25 PM Syaoran Having a similar issue:
Low speed bumps causes a ... Aug 24, 2012 - 5:18 PM jordisonjr Is it only when you hit bumps unevenly? And no noi... Aug 25, 2012 - 12:21 AM Syaoran QUOTE (jordisonjr @ Aug 25, 2012 - 1... Aug 25, 2012 - 10:22 AM 955SFE Did OP ever find the solution?
I am having almost... Apr 20, 2013 - 6:32 PM richee3 QUOTE (955SFE @ Apr 20, 2013 - 6:32 ... Apr 20, 2013 - 7:34 PM travisxcore Check your caliper pins. When they dry out they te... Apr 20, 2013 - 6:50 PM 955SFE QUOTE (travisxcore @ Apr 20, 2013 - 7... Apr 21, 2013 - 6:25 PM |
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