Removing stuck fasteners
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(→General Advice) |
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*Keep in mind that fastening hardware stuck together by corrosion is stuck because the corrosion has expanded and tightly bound the fastener. This means a really stuck bolt will not allow penetrating oils in to do any good. | *Keep in mind that fastening hardware stuck together by corrosion is stuck because the corrosion has expanded and tightly bound the fastener. This means a really stuck bolt will not allow penetrating oils in to do any good. | ||
*There are two effective means to break the friction that corrosion has caused. One is through mechanical movement, a proper good whack with a hammer. The other is through differential heating. Making one part expand more than the other. | *There are two effective means to break the friction that corrosion has caused. One is through mechanical movement, a proper good whack with a hammer. The other is through differential heating. Making one part expand more than the other. | ||
| − | *With heating, bear in mind | + | *With heating, bear in mind axles and other important structures may lose their strength if they are heated much above 300 degrees. If you have the oil and grease starting to smoke, then you are in the 300-degree range. |
*When taking off cylinder head studs, look at the base. If you see erosion into the stud at the block surface, odds are pretty good you will break the stud. | *When taking off cylinder head studs, look at the base. If you see erosion into the stud at the block surface, odds are pretty good you will break the stud. | ||
| − | * Whatever system you use, once you have a hold of the bolt,stud, or whatever, try rocking it forward and reverse a little at a time. If you can get it to move, it is more likely to come out. An older mechanic said always try to tighten a little before you loosen. Remember, if it moves, you are half way home. Also, | + | * Whatever system you use, once you have a hold of the bolt,stud, or whatever, try rocking it forward and reverse a little at a time. If you can get it to move, it is more likely to come out. An older mechanic said always try to tighten a little before you loosen. Remember, if it moves, you are half way home. Also, brake fluid works great as a penetration oil. |
==Smack it with a hammer== | ==Smack it with a hammer== | ||
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