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BlueScooby's 06 STI - 03/16/19 Track Day Synopsis
BlueScooby's 06 STI - 03/16/19 Track Day Synopsis
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Old 11-05-15, 09:27 AM   #421
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

so I have got a strange clunk coming from, what sound like, the front right suspension/wheel area. It only happens when turning right, it only happens if its a harder turn, and I think it only happens under power (although that could be wrong).

I just crawled under the car again, during lunch all the bolts seem to be tight, nothing is loose or moveable (by hand) there are no visible signs of any scraping/things touching/movement...

It kinda sounds like something hitting sheet metal (fender) but the fender is clean/dent free/etc.

I suppose it could be the CV joint, but it doesn't sound anything like the CV joint noise I'm used to hearing... The axel nut appeared to be tight, the pinch was still in the slot.

Brakes arent loose or anything. It could be one of the bushings I guess, but nothing is moving when I push on it (although I guess that doesnt eliminate that possibility since its only hard turns that produce the noise...).

I'm really at a loss for what to look at next...

any suggestions?
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Old 11-05-15, 10:21 AM   #422
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

endlinks and swaybars?

Check the top nut on the strut as well, it might not make noise until it's unloaded/loaded.
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Old 11-05-15, 10:37 AM   #423
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

I will check those, but Ive actually had both happen to me before and Im doubtful thats the source of the noise

Any other ideas?

After leafing through the multitude of "clunking" threads, the nut/bolt through the rear LCA joint (where my ALK is) could be loose...
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Old 11-05-15, 12:43 PM   #424
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

I had the exact same thing and it ended up being an end link.
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Old 11-11-15, 06:07 PM   #425
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

Welp, I had a similar issue. I thought it was a bad axle as I had a boot torn but it turned out to be a blown strut. I've had to have a strut rebuilt on numerous occasions now and am pretty in tune with the noise now. I hope it's something that's just loose but anything's possible.
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Old 11-12-15, 05:07 AM   #426
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

Quote:
Originally Posted by xirallicGDB-F View Post
Welp, I had a similar issue. I thought it was a bad axle as I had a boot torn but it turned out to be a blown strut. I've had to have a strut rebuilt on numerous occasions now and am pretty in tune with the noise now. I hope it's something that's just loose but anything's possible.
its funny that you say that, because the strut in that corner is the only one that doesnt have a Feal Revalve... I had to replace the revalved one in a pinch and just put a used factory strut on there... I wonder if thats my issue.
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Old 11-12-15, 06:06 AM   #427
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

Quote:
Originally Posted by BlueScooby View Post
its funny that you say that, because the strut in that corner is the only one that doesnt have a Feal Revalve... I had to replace the revalved one in a pinch and just put a used factory strut on there... I wonder if thats my issue.
If I we're a betting man...
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Old 11-16-15, 11:25 AM   #428
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

i had been meaning to do something about that strut, in terms of getting a "matching" one installed, for about two years now. After this latest clunking, I figured I'd finally do it. I called Feal this morning, and they actually had two front cores in stock! Pretty sure they don't normally have ANY cores in stock, so that is awesome. I was going to just get the one, but Odi recommended I do all 4, or at least in pairs, so I'm getting a "new" set of front struts from them

I had wondered if it was possible that the noise was related to the engine mounts (which is unlikely) but this past week, I've noticed the engine shaking a bit more on startup and making some clunks like the engine is shifting/bouncing on startup... So I ordered some Group N engine mounts and a Kartboy Pitchstop I was going to go with the Group N Pitchstop but apparently its not really a worthwhile upgrade.

Between the two, of these, i better not have any more unwanted noises up front...
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Old 11-23-15, 04:58 AM   #429
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

A lot of news!

Installed Group N engine mounts and a Kartboy Pitchstop. Things are much firmer/connected, which is great, but man those engine mounts are noisy! Pitchstop made basically no NVH difference though.

I have been plauged with coolant leak issues with my upper/lower radiator hoses on and off for the past year or two, so I bought some Mishimoto T-bolt clamps thinking that was the solution. Little did I know that T-bolts don't work well in smaller sizes. I had dropped the car off at the shop to do the engine mounts because I didnt want to mess with them and asked them to swap out the T-bolt while they were there. They found my water pump discharge elbow had corrosion/pitting so they replaced that. In the process they found the timing cover was loose and missing bolts. So they pulled that apart to fix, and found my timing belt tensioner and one or two pulleys needing to be replaced, and potentially never were (even though I paid the dealer to do that...). And my timing belt was off a tooth on one of the cam gears.

I'm glad they found all that, but the cost of my "little" trip to the shop was now quadrupled...

Now back to the fun stuff.

I pulled the rear diffuser off and the "phase 3" panels to trim about an inch off the right side. Ever since Ben noticed it wasn't even, it has been driving me nuts! It's not perfectly even, but now its much closer and not noticeable. I also hit the two end-fences with some black spray paint so they don't look so crazy driving down the road.

I still need to cut the two middle strakes and get everything welded up...
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Old 11-23-15, 11:53 AM   #430
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Default Re: BlueScooby's 06 STI - Underbody Panels Phase 4 (rear diffuser)

Heres a couple of pics of this weekends work. Its harder to see the end-fences now that they are black


I'm not sure if you can tell or not, but the width of each side is MUCH more even now. I think I might not have been directly behind the center of the car though, as it still looks a little skewed in this pic though...


I still need to cut out those middle strakes. One of these days.... lol
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