Join Date: May 2003
Location: Tinton Falls, NJ
Yes that is a firewall crack. Just welding it won't work because it makes the metal brittle, and it will crack again. To prevent it from going any further, drill 1/4" holes at the ends of any points (it looks like you have 3 on that crack, 2 on the left side and one on the right), then weld across the crack, and finally plug weld the holes you drilled.
-91 Cougar LS, coming soon, complete overhaul
with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad