Yes, the
Tail Pipe section is #10 (94700609) in the diagram below.
Interactive version here.
#7 is the
Muffler & Pipe (94738538) section starting at the engine side, ending at #11, the half burned out
Tailpipe Gasket (15036012) you can see in my first photo. That was shot from above looking outboard ~, so the top side burned out first.
With that break the tailpipe section will pivot up/down in line with the end of the muffler pipe. It doesn't seem to want to fall backwards more than the gap you see in those photos. Tried pushing it back further to get better photos of the bolt breaks. Maybe that #12 hanger is supposed to let it bounce around?
Why did you elect to turf the old tailpipe section? I'll look more closely at that entire section tomorrow but other than the bolts broken between the flanges and the destruction of the gasket...if the face of the flanges can be cleaned up I'll try to have it repaired.
Repair vs Replace: Trying to figure out if a properly motivated mechanic will even be able to get the right tools in there to remove the broken bolts and mate the two back together with a new gasket without having to remove it. Have a
FEL-PRO 61287 gasket in hand already. I'll band-aid it up to a point... Some kids toss the stock exhaust the day they bring the truck home...this one's given nine years and didn't even complain when it was hurting. I inspected the muffler section and it seems ok... I've never had to replace an entire exhaust system but it's always seemed like one of the primary parts that would wear out. Muffler shops must exist for some reason... Is there a replacement exhaust system for the H3T I should be excited to consider sooner rather than later?
In thinking about what caused that break... It's entirely possible (read: probable) that exhaust tip's been backed into snow and mud banks in it's lifetime; the 'mud' flap/wheel well lining a few inches from it is somewhat more flexible than the other side. Maybe contact with the tip translates into the tailpipe section being bent upwards at the join, creating a gap on the top side and promoting that sort of burn through?
I lashed it back together with a dozen or so loops of thin garden wire for the moment. Was -5 C here last night (23 F)...can see nearly all exhaust making it into the tailpipe section...there's still an air gap and the original gasket is more than 50% gone so not surprised to see it leaking from that area still. Wouldn't put a dog back there with it like that. Even if the flanges were cleaned up...this replacement part is so thin I can't see how the two sections would be ever be fully sealed...unless they just torque the hell out of it. But that would lead to...oh broken bolts. Maybe that's how exhausts systems work?
The "excessive vibration" I reported to a GM service center a month ago, which didn't go away after a $750 CAD tune up (~550 USD, new plugs/flush/etc.) That vibration I would feel at stop lights even when it was warmed up and shifted into neutral...is all but gone and the revs seem to have dropped back to 500, where I feel it used to be all the time. Would a tailpipe flange blocking a muffler pipe increase RPM and engine vibration?
Same parts on H3/H3T...so
if you've never done an inspection there...you might want to have a look see at the 15036012 Tailpipe Gasket all the way round and preemptively replace it.
