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Old 02-04-2012, 02:36 AM   #1
jflores55
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Default bad firewall flex

So today I found out that I have very bad flex in my 09 wrx and it keeps me from fully engaging the clutch. Is this a common issue with 08+ wrx's? Is there any way to reinforce the firewall to keep this from happening?
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Old 02-04-2012, 02:52 AM   #2
XanRules
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Turn in Concepts clutch brace.
Yaaaaaay
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Old 02-04-2012, 04:26 AM   #3
HinshawWRX
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Define "firewall flex"
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Old 02-04-2012, 02:10 PM   #4
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Yes, define what it is.
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Old 02-04-2012, 03:58 PM   #5
jamal
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I don't think the firewall is causing your problem.
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Old 02-04-2012, 11:34 PM   #6
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Quote:
Originally Posted by jflores55
So today I found out that I have very bad flex in my 09 wrx and it keeps me from fully engaging the clutch. Is this a common issue with 08+ wrx's? Is there any way to reinforce the firewall to keep this from happening?
Umm no.
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Old 02-05-2012, 01:33 PM   #7
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Quote:
Originally Posted by jflores55 View Post
So today I found out that I have very bad flex in my 09 wrx and it keeps me from fully engaging the clutch. Is this a common issue with 08+ wrx's? Is there any way to reinforce the firewall to keep this from happening?
Who diagnosed this and how?
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Old 02-05-2012, 03:05 PM   #8
jflores55
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Took it to AWDtuning. Whenever I step on the clutch the entire pedal assembly moves and the firewall, specifically the area around the clutch master cylinder, moves. They told me most WRXs have thin firewalls and flex when an upgraded clutch is installed. I might have a non OEM clutch installed and that may be whats causing this. I really don't know since I bought the car used and was told by the dealership that it's completely stock.
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Old 02-05-2012, 03:24 PM   #9
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Your physical firewall is not flexing, the clutch master cylinder does have movement, which is common for WRX/STI's. They make a brace that will stiffen this up and fix the problem. But, once again, your firewall is not literally flexing.
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Old 02-05-2012, 03:42 PM   #10
jflores55
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Thanks a lot. Is there any specific brand that you might recommend me?
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Old 02-05-2012, 06:33 PM   #11
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Quote:
Originally Posted by jflores55 View Post
Thanks a lot. Is there any specific brand that you might recommend me?
grimmspeed.
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Old 02-05-2012, 08:35 PM   #12
jflores55
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The more I look into the issue, I keep finding other people that have the same problem. People have found 2 or 3 spot welds that break which is also the reason for the squeaky pedal that I have.
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Old 02-05-2012, 08:41 PM   #13
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Quote:
Originally Posted by jflores55
The more I look into the issue, I keep finding other people that have the same problem. People have found 2 or 3 spot welds that break which is also the reason for the squeaky pedal that I have.
Firewalls don't flex. Master cylinders do.

For accuracy, take it to a more reputable shop than whoever you originally went to and see what they think.
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Old 02-05-2012, 09:12 PM   #14
HinshawWRX
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If a firewall was flexing, your car would be flexing. The firewall is the single strongest point of the vehicle.

I do have the squeaky pedal though.
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Old 02-06-2012, 12:21 PM   #15
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I don't get the idea that the firewall does not flex. It's just sheet metal. Cars flex.

For the add-on brake booster, the flex comes from the firewall, not the brake cylinder components. The brace adds bracing between the firewall and the strut tower.
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Old 02-06-2012, 02:15 PM   #16
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Quote:
Originally Posted by wobbletop
I don't get the idea that the firewall does not flex. It's just sheet metal. Cars flex.

For the add-on brake booster, the flex comes from the firewall, not the brake cylinder components. The brace adds bracing between the firewall and the strut tower.
It doesn't flex from depressing the brake pedal.......
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Old 02-06-2012, 05:53 PM   #17
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Quote:
Originally Posted by sc00by4life View Post
It doesn't flex from depressing the brake pedal.......
Ok, what do you attribute this movement too?

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Old 02-06-2012, 06:02 PM   #18
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It's a little of everything moving.

Get yourself a brake master-cylinder brace.

http://www.grimmspeed.com/catalog/pr...roducts_id=213

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Old 02-06-2012, 06:53 PM   #19
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Quote:
Originally Posted by Big-E View Post
It's a little of everything moving.

Get yourself a brake master-cylinder brace.
Yes, yes. But I doubt the piece of cast aluminum (cylinder) is flexing, compared to the sheet metal (16ga?) of the firewall.
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Old 02-06-2012, 07:25 PM   #20
jamal
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uh, these master cylinder braces everyone is talking about are for the brakes, not the clutch. I suppose it might still help a little bit, but I still have a hard time believing that the firewall is deflecting to the point of the clutch not working right. Warranty?
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Old 02-06-2012, 08:04 PM   #21
wobbletop
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I agree that the firewall should not flex enough to cause the clutch to not work, but my point was that the firewall does flex a fair amount, especially when you're putting all your weight on the brake pedal.
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Old 02-10-2012, 03:32 PM   #22
jflores55
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Subaru has let out a notification to all technicians notifying them that some welds might be broken on the newer model (08+) WRX and STi. I took it to a dealer and they wanted to charge $500 to take off my dash and look at the damage. I'd then have to pay for whatever they have to re-weld. I'm at 58K and this repair does not fall under the 60K warranty.
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Old 02-11-2012, 12:45 AM   #23
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How on earth is anybody arguing that the firewall does not flex? The single strongest part of the vehicle? Please, it's a piece of thin sheet metal. Do everyone a favor and pop your hood, then watch the firewall while you have somebody push the brake pedal, case closed.

Yes the firewall flexes
Yes it's significant
No it's not the strongest part of the vehicle BY FAR

Does the firewall flex when pushing in the clutch? I doubt it, at least not significantly and not with the stock clutch, but with an upgraded clutch I wouldn't be surprised if you would start to see some noticeable flex. It wouldn't be enough to keep the clutch from disengaging though, more of a consistency and pedal feel kind of problem. Now if there are broken welds on the firewall it could be more significant than I've seen, and maybe cause disengagement problems with the clutch, but I'd be more inclined to blame the master or slave cylinder or air in the line.
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Old 02-11-2012, 12:50 AM   #24
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Quote:
Originally Posted by jflores55 View Post
Subaru has let out a notification to all technicians notifying them that some welds might be broken on the newer model (08+) WRX and STi. I took it to a dealer and they wanted to charge $500 to take off my dash and look at the damage. I'd then have to pay for whatever they have to re-weld. I'm at 58K and this repair does not fall under the 60K warranty.
call SOA
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Old 02-11-2012, 03:39 PM   #25
jflores55
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Called SOA. Basically let me know the same thing that the dealer told me. I'll be taking off my dash tomorrow and will see what the damage is. I took a couple of courses back in high school for welding however I'll probably pay a buddy of mine to do the job. I just can't believe that I'm going to have to go through all this when the car is not even that old. It's even worse since I haven't even owned it for even a year.
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