Sup HT, got a weird issue going on with my brake pedal. So sometimes when I press on the brake pedal it makes a knocking sound on the firewall??? It doesn't do it ALL of the time, but once it does it I can make it do it just by BARELY tapping the pedal. I stuck my head down there and looked around when I press on it and I can see the pedal pushing into the firewall and the knocking is coming from INSIDE the firewall......its not on the pedal assembly inside the cabin area. And its ONLY the brake pedal......gas/clutch pedals work fine with no funny noises.

So my question is this: is there a bushing or grommet or plug that is on the firewall that the brake pedal goes thru that may have come loose or wore out or something? I couldn't find anything on the exploded parts diagrams under the pedal assembly or the grommet/plug sections? Anyone ever have this problem before?

ANY help/advice/opinions would be GREATLY appreciated!!!

 

Any ideas......ANYONE???

 

Sounds like the 4 bolts that hold your booster/MC may have vibrated loose. Make sure all 4 are there and tightened

 

Yeah they're all there and tight......had it replaced a while back, but it was making that noise even before I replaced the MC.

 

This is all that holds your pedal to the brake booster.
A little pin goes through that hole and that's it.


There are 2 nuts that hold your MC to the booster


There are 4 nuts that hold the booster to the firewall/pedal assembly.


After the 4 nuts for the booster, there are a few more that hold the rest of the pedal assembly to the firewall.



Something sounds loose.
Go dig around and take a look at all the nuts and make sure they are tight.

 

Yep that is correct. I believe they are all 12mm nuts if I'm not mistaken. Had this issue a long time ago. Easy fix just make sure u check each one

 

Thanks guys!!! I'll have to go check whenever I get some extra time......I'll let you know what I find out.