Rust problems :(
10-05-2011, 01:37 PM
#1
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Rust problems :( When I bought my bird a year ago, my mechanic said the exhaust manifold bolts were rusted in place. They didn't fix a leaking gasket because they were afraid the bold would break off inside the head. Any suggestions? The exhaust manifold gasket leaks but seals itself after the engine heats up. I want to get some headers on and replace the gasket.
10-05-2011, 02:12 PM
#2
If the bolt is really bad, you might end up snapping the head off, but it should be fixed, so you're going to have to deal with it at some point. Just spray them down with penetrating oil and let it sit for a while. That's about as good as you'll be able to do. If it breaks, you'll likely have to pull the head to extract it which is what the shop was trying to avoid.
10-05-2011, 03:09 PM
#4
You would ideally use a bolt extractor to remove what's left...as a last resort, you could use a drill and keep increasing the drill bit size until you can collapse the rest of it and pull it out that way. You could always drill the hole out and retap it with a heli-coil, but if you can get the bolt out using either of the first two methods, you won't have to go through that trouble.
A good penetrating oil will minimize this risk though.
A good penetrating oil will minimize this risk though.
10-06-2011, 10:52 AM
#6
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Are you talking manifold to head, or manifold to cat? The
latter, just some Kroil or whatever, for a few evenings
straight just keep hitting the threads, and then the
impact gun at a setting below bolt-shear letting it take
its time.
In the head, I'd be surprised if it was really rusted that
badly in the threads.
One thing that works for me is, tighten before you loosen.
Just enough to break it free going in, is sometimes easier
than backing out and you're griefing on the other side of
the face so a little rounding won't screw you (heh) as bad.
Sounds like your mechanic has a small tool.
latter, just some Kroil or whatever, for a few evenings
straight just keep hitting the threads, and then the
impact gun at a setting below bolt-shear letting it take
its time.
In the head, I'd be surprised if it was really rusted that
badly in the threads.
One thing that works for me is, tighten before you loosen.
Just enough to break it free going in, is sometimes easier
than backing out and you're griefing on the other side of
the face so a little rounding won't screw you (heh) as bad.
Sounds like your mechanic has a small tool.
10-06-2011, 08:03 PM
#7
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I'm talking manifold to head. He has one of the biggest shops in the area. I really want to get it taken care of though without dropping a ton of cash :/