got some time this afternoon to start on exhaust. I was going to order from Columbia River Mandrel Bends, but found a place down here on socal called Performance Tube Bending in Irwindale that has a good stock of mandrel bends at good prices, so drove over there on Friday and picked up a handful of bends.
There have been a few LOUD backfires. Better tune this truck up to cut down on backfires I guess!
one stud joining exhaust manifold to exhaust collector was replaced with something that had a nut on both sides. As soon as I got the threads loose, the bolt/stud shifted sideways. Turns out someone in the past drilled a hole and a half. The metal off to one side of the hold is fairly thin now.
There's enough material there to still hold a bolt, but not ideal.
The stud on the bottom/middle of the flange started out well enough, but tightend up after a few turns, and got that soft feeling halfway through a turn. So, one drilled out hole that's a mess, and one broken stud still stuck in the end of the manifold. Ugh.
The third stud also felt pretty tight after removing the nut about halfway and after the other two, I might just be paranoid, but the stud didn't look straight to me when under the truck. I soaked the shit out of these with pb blaster, but didn't use heat. I also doused all the other manifold bolds in pb blaster before wrapping up, in case I'm pulling the manifold off tomorrow.
So, 2 things that aren't good on the current exhaust manifold. Would it be better to drill out the stud, drill oversize and use bolts? Get that ragged hold welded and re-tap holes? shop for another manifold?