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Old 05-29-2018, 05:45 PM   #1
nmtmev
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2011 Wrx STi
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Default Help with 11' STI suspension proplem.

So to keep this short.. 45k miles, stock suspension. I took the car off-road a few times this year and now everything rattles. I'm okay with that part, but it seems since the last time we went dirt roading the suspension seems to be really harsh now. I had the car aligned afterwards just as a precaution. It was not like this as far as i can remember. Nothing looks broken underneath. Do you guys have any tips

The problem is when at normal cruising speed the car hits a bump and the bump and the rebound is really harsh. Even little junction cracks on the freeway are unpleasant. Like you can hear the tire hitting too. I dont wanna call it violent but it almost is. I also have a floatyness problem but I'm pretty sure that's my all season tires. How do I go about diagnosing what could be the problem, before I start replacing stuff.

I also have a 17' C7 vette, with no magride. I drive the same highway route in the same lanes with it and it's nowhere near that harsh at all. If anyone can tell me where to start I'd greatly appreciate it.
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Old 05-29-2018, 08:00 PM   #2
A-man07
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Sounds as if you blew a strut.
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Old 05-30-2018, 05:01 PM   #3
nmtmev
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Quote:
Originally Posted by A-man07 View Post
Sounds as if you blew a strut.
How do I verify?
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Old 05-30-2018, 08:24 PM   #4
A-man07
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You likely should take it to a reputable shop that should be able to diagnose for it you pretty easily, my first choice would be a performance Subaru specialty shop, but a Subaru dealer should also be able to tell you. You could always look at the strut body and see if you see oil that has overflowed onto it but if it is dry wont necessarily rule it out. Where do you live and someone should be able to point you in the right direction...I haven't looked specifically but youtube might be worth a search as well
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Old 05-30-2018, 08:28 PM   #5
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Old 06-08-2018, 03:39 PM   #6
nmtmev
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I'm gonna look right now, the car is going up in the air in a few min. What's up with this though? both fronts are like that?
https://drive.google.com/file/d/11lC...w?usp=drivesdk
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Old 06-14-2018, 01:53 PM   #7
BlackFighter
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Those are your top hats, they are made out of hard rubber. What year is that car? Prob old and need replacing. Get the Grupp-N top hats, they are better. If those are 2011 that really sucks. My 2004 OEM STi once still look good.
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Old 09-17-2019, 10:13 AM   #8
nmtmev
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Default Updating old thread

It's been well over a year so I figured I would update this thread I started as life gets in the way sometimes. Right after the last post I was sent out on work duties and have only been home for a few weeks at a time/ seldom driving the vehicle. Just a recap from last time. The top hats as pictured are still on the car. The shocks seem to be working properly as I just had them inspected during a recent tire change ( old ones were rotted, so I picked up a full set of michelin pilot sports) after the tire change the car rides a little better. Still the ride is harsh, the bumps are harsh.

Now that I have returned to a normal state of life I can focus on repairing stuff and replacing things. Over the coming weeks I will try to post pictures of what's going on just incase anyone finds this thread and runs into similar issues.

This vehicle will be now delegated to daily driving duties as I have acquired a couple new whips for pleasure weekend driving.

I will be pricing out top hats/ bushings/ anything else that is needed in the coming weeks to replace on the stock suspension. The thinking was to maybe do a set of coil overs and replace the stock bits. I've heard a lot of good and a lot of bad when it comes to coilovers and daily driving.

I appreciate the help above and if you guys have any more suggestions about brands and things like that or in general, feel free to post them in this thread. Thanks!
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Old 09-19-2019, 09:03 PM   #9
nmtmev
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Default Update Eibach lowering springs

I was poking around online today and Eibach has their Pro Kit performance springs on close out (2008-2014) model year STi wagon for only $122 with free shipping for a set of 4. I mean for that price I jumped on it and if I hate them I can always put the stock springs back on and sell those at a little bit of a loss. I'm not gonna complain about the price.

So far I also ordered replacement strut mounts which should be in this saturday. Looking at getting the Whiteline Front bushing package. I just gotta see how the fronts are looking if they are cracked or warped or anything like that then I guess it's a go.
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Old 09-19-2019, 09:25 PM   #10
Sour_K
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If you have a bad strut I'd be careful putting more load on it with lowering springs. Are you getting replacement struts or just using the stock ones? Koni makes good struts that work great for lowered cars. Typically the stock struts can handle the eibach springs, but they weren't designed to run that low constantly and it will make them go out sooner than at the stock spring height. I know because I did the same thing with my 08 hatch before swapping out completely to coil overs.

If it were me, I'd find the issue with the rough suspension before I started modifying it, best of luck and hopefully it works out.
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Old 09-19-2019, 10:14 PM   #11
nmtmev
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Quote:
Originally Posted by Sour_K View Post
If you have a bad strut I'd be careful putting more load on it with lowering springs. Are you getting replacement struts or just using the stock ones? Koni makes good struts that work great for lowered cars. Typically the stock struts can handle the eibach springs, but they weren't designed to run that low constantly and it will make them go out sooner than at the stock spring height. I know because I did the same thing with my 08 hatch before swapping out completely to coil overs.

If it were me, I'd find the issue with the rough suspension before I started modifying it, best of luck and hopefully it works out.
Thanks man. Im thinking its still just the top hats they are funked up... I'm going to assess the situation and go from there. I can't do anything till saturday anyways. For the price of the koni shocks it might just be worth it to go the coil over route. So far the alignment is still on point and the new tires are not cupping or wearing weird. They have a few thousand miles on them. I don't have excessive bounce or weird steering or anything like that. Coil-overs are still an option though. Who knows I'm pretty spontaneous. I'm also on the brake pads and brake fluid flushing thing while I got all 4 corners off. We will see. I may not even put the lowering springs on yet. I wanna see what replacing the top hats does first on the stock springs.
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Old 09-25-2019, 10:13 PM   #12
nmtmev
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Default Update

So I got to working today on the car. I had all 4 corners of the suspension out at one point. I installed the front top hats on the stock springs/struts and I dropped the car and took it for a spin. The passenger side top hat seems to be making a clunking/popping type of sound while turning. (Standing still I'm just moving the wheel around) and mind you these are brand new. So I took them out and off and installed the lowering springs all the way around. Same problem. While the car is on the ground the passenger side tophat bolt is tight against the Allen key nut... if that makes sense. But with a little bit of force I can move it with the 17mm socket and when I do I hear that sound?. What do you guys think I should do next? I know the stuff is installed correctly I verified that 2x already. So you think the strut is shot finally or did I get a defective part?
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