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Old 04-13-2012, 11:50 AM
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Removing Rusty Bolts

Has anyone ever tried (Aero-Kroil) to loosen and remove rusted out bolts from an exhaust manifold with out breaking them in the heads ? What method do any of you fellows use will be very helpful , I don't want to break any bolts in the head.

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Old 04-13-2012, 12:26 PM
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This would be my first suggestion:

http://youtu.be/KwKHSvKfnHI

Heat is your friend here-
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Old 04-13-2012, 01:11 PM
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My old trick that has worked for me for years is to heat up the bolt with a torch, then quench it with water. Heat it, then cool it, do this a few times. The bolt expands and contracts and breaks loose from the rust. It works magic for me.

Brian
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Old 04-13-2012, 05:09 PM
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I have some aero-Kroil but don't think it is much different than other penetrating oils. Use the heat as suggested but it won't hurt to spray some oil on it after it cools enough to be safe The heat may help pull some of the oil in. If it starts to bind as you screw it out heat it again before you break it off. Good luck.
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