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Old 12-15-2018, 12:09 PM
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edevinney edevinney is offline
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OK - tips and tricks for stuck exhaust studs? 6 came out, six did not. The remainers are rusted and in no condition to be reused, so really must come out.

To date, I've tried and failed with:
  • days of PB Blaster, with hammer tapping
  • heating the stud
  • heating the head from the exhaust port
  • welding on a nut and trying to remove when warm
  • welding on a nut and letting it cool
  • welding on a nut and heating the head from the exhaust port
In each case I've tried gentle turning R and L, sometimes with light impact. I support the tool and stud while applying force, to avoid bending forces. The studs just laugh at me and snap, usually right above the twisting point. I'm a fat, out of shape computer guy usually using a 3/8 ratchet, so there's something going on here besides my Hulkish strength.

The motor is coming out, so I could pull the heads to have the studs removed and have the valves done While I'm In There, but as noted I'm trying hard to avoid Shipwright's Disease.

Maybe the studs have gotten brittle with age and heat cycles? Regardless, I'd really like to get them out safely and move on to bigger things - hints and tips are most appreciated
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