[Cliff Claven]

What is the best way to remove studs from a 25-year-old 3.0 liter case. A few of them are totally stuck. Penetrating oil, heating, even heating and shocking with cold are not working. We're looking at opening the case and machining them out but I don't want to crack open the case unnecessarily.

[jpnovak]

What type of heat are you using? They are put in with red loctite. It takes a lot of heat to pull them. put a suitable stud puller on them. Heat the case inside the spigot hole next to the stud. Don't heat the stud. Keep the heat moving along the case while putting pressure on the stud. Once the loctite heats up the stud will turn. Keep the heat on it until the stud is out.

Propane will work but expect 20-25 min of heating for each stud. Oxy-acetylene should take about 5 min. Remember, the case is a large heat sink. It will take a while to heat it up.

[Charlie Stylianos]

Propane will work but expect 20-25 min of heating for each stud. Oxy-acetylene should take about 5 min. Remember, the case is a large heat sink. It will take a while to heat it up.

Never had luck with propane, myself. For stubborn studs, I used MAPP/OXY (buy kit at Home Depot) and heat the case like Jamie mentioned (not the stud). As you heat, keep constant torque on the stud and when the bonding agents melts, you'l feel the stud move. Some have been EXTREMELY stubborn where I thought the stud would snap due to excessive torque. They eventually came loose with enough heat and patience. Machining them is LAST RESORT IMHO (like if you snap the stud flush with the case) b/c there is much room for error and you dont want to destroy accidentally or widen/weaken those holes if you can prevent it. If there is whole/partial stud protruding, be patient and heat/twist it out.

[William Miller]

I have a big Oxy/Acetylene set-up at the house if you want to come play.
It's a little hard to transport, but possible.
I also have a weid looking cam action stud removal tool which should give you a good bite on the stud.

[Cliff Claven]

Thanks, I appreciate the input. You've given me new determination.