Need help! Exhaust stud removal., Got that sumbiatch out!! |
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Need help! Exhaust stud removal., Got that sumbiatch out!! |
KaptKaos |
Jan 2 2009, 06:31 PM
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#1
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Family Group: Members Posts: 4,009 Joined: 23-April 03 From: Near Wausau Member No.: 607 Region Association: Upper MidWest |
I snapped the top off of an exhaust stud a few days ago. There is thread left, but not too much. I have tried to double-nut it out, but there isn't enough engagement to get 2 nuts lined up and tight.
I tried some red lock-tite, and let it sit on a nut on the stud, but it came right off. I need some tips or tricks to getting that stud out. TIA |
HAM Inc |
Jan 3 2009, 11:41 AM
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#2
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Those ex studs are a real PITA. Sometimes even old ones that look good turn out to be brittle. Early on I would leave the original studs in when servicing heads for customers that wanted to save a buck. If they looked okay and the guy didn't want to spend the money... After to many broke during reassembly, I quit offering the stud replacement as an option and made it standard.
I remove the old ones with the head mounted in a fixture on one of my Bridgeports. And let me tell you, even in that ideal postiion with heat and PB Blaster some of them just flat won't come out! (IMG:style_emoticons/default/headbang.gif) Drilling down the middle of the stud is tricky but doable in the mill. Laying on your back under the car and trying to shoot down the middle of the old stud with a hand drill and a left hand drill bit... some really skilled/lucky people have pulled it off. And some really skilled/unlucky people have shot into the combusiton chamber! The row of studs that are closer to the crankshaft are the ones that cut right under the combustion chambers. These are the ones you really have to be careful with. If the bit drifts off center it can and often does run right into the chamber. I have seen many heads that came in for this secondary repair after a DIY nightmare. In one case a fellow working on one of the other studs actually drilled into the valve guide and didn't stop until he hit a valve! I sympathize with anyone attempting this while laying under the car. Heat, patience, PB Blaster and prayer! Good luck, and wear eye protection! |
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