Cat Replacement - Ran into a little problem
Have someone (Friend) drop the manifold off at any exhaust shop and say "Remove all the studs from these exhaust manifolds"
Pick it up when done and replace with your favorite stainless steel hardware.
Pick it up when done and replace with your favorite stainless steel hardware.
I went through this recently on my car. It'd probably take more like a half hour. As the studs are harder than the iron manifold, the drill bit will wander and the hole(s) will be way off center. You'll then need bigger holes to get bolts lined up with the cat flange.
Drilling can be done but it's a process.
Drilling can be done but it's a process.
Thread Starter
Teching In
Joined: Sep 2011
Posts: 23
Likes: 0
From: Beaver, PA
Well, it's done deal. The new one was ~$180 on my front porch. The GM one was ~$240 plus shipping and this particular source isn't very fast with shipping. The used ones that had pictures on eBay all still had the cat flange/bolts still attached. Didn't need to lose another battle.
Assuming the new one doesn't have fitment problems, this was the guaranteed way to get it done in the small window of time that I have on Saturday.
Assuming the new one doesn't have fitment problems, this was the guaranteed way to get it done in the small window of time that I have on Saturday.
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Brett Foote
Launching!
Joined: Feb 2010
Posts: 277
Likes: 1
From: Shawnee, OK
man i wish i wouldve seen this sooner ive got both manifolds sittin in a corner in my shop i wouldve let you have for cheap. sorry to hear your havin trouble with the car but the little bit of hassle now is worth all the fun later it really is. good luck.
Thread Starter
Teching In
Joined: Sep 2011
Posts: 23
Likes: 0
From: Beaver, PA
Everything is installed and I just got back from a ~12 mile test drive. Previously, the car had a stumble, sometimes very bad, when at idle in closed loop. Idles very smooth now. New exhaust manifold, cat, front and rear O2 sensors, driver's side plugs and plug wires. I have to wonder which if these really was necessary. I hope that the problems are gone now. I plan to put about 500 miles on it this coming week.
That rear O2 sensor connector couldn't have been put in a worse spot. I wish the GM engineer that approved the location and length of that harness connector was in the garage with me. I would have beat him senseless.
