ReBlown47 Posted May 2, 2012 Report Share Posted May 2, 2012 So i got some headers installed in my monte. Took alot of massaging just to get them in. But the rear header seems to rubbing against the firewall right underneath the ac line. Causing random vibrations when driving, turning and turning AC on. Shop wasnt sure if its okay to pound there or not. Told me to wait to see if it settles after week or so then we'll see what else we can do. Front pic: Quote Link to comment Share on other sites More sharing options...
GtpKo Posted May 2, 2012 Report Share Posted May 2, 2012 I had that problem as well when I installed headers on my '00. I had to hammer away at the firewall/footwell corner. Just check whats behind where you need to make room just in case so you won't f anything up. Aside from being annoying it can cause false knock as well. I wouldn't wait to see if it "settles" Seems like headers will easily hit either the firewall or steering rack, you have to get it just right. Quote Link to comment Share on other sites More sharing options...
tornado_735 Posted May 2, 2012 Report Share Posted May 2, 2012 IIRC, didn't Bxx have to take an air hammer to Andrei's firewall so the headers would fit on his Regal? Then again, this is 1 vs 1.5 gen... Quote Link to comment Share on other sites More sharing options...
rich17 Posted May 3, 2012 Report Share Posted May 3, 2012 What vehicle is the headers on? Quote Link to comment Share on other sites More sharing options...
rich17 Posted May 3, 2012 Report Share Posted May 3, 2012 Nevermond just seen your for sale thread. Gen 1s and Gen 1.5s have the same firewall. Gen twos have different firewalls. To install headers most just beat back the firewall. But the betterway is to weld in new metal. I am actually surprised you were able to even bolt them together on the car. Quote Link to comment Share on other sites More sharing options...
ReBlown47 Posted May 3, 2012 Author Report Share Posted May 3, 2012 i just wonder is okay to beat the firewall underneath where the ac line goes into? Quote Link to comment Share on other sites More sharing options...
rich17 Posted May 3, 2012 Report Share Posted May 3, 2012 The AC line should be way further up then where you'll be beating... Quote Link to comment Share on other sites More sharing options...
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