Re: [DMCForum] Re: Worst Case Scenario: The DeLorean Edition
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Re: [DMCForum] Re: Worst Case Scenario: The DeLorean Edition



I think the point is for a temperature difference between the bolt and
what it's screwed into.  Heat expands the block and the stud, and the
'freeze' is supposed to cool the stud to contract it, supposedly
increasing the space between the stud and the block.  

Jim

--- "checksix3" <jetjock11@xxxxxxxx> wrote:

>>Heat the area around the stud and cool<<

Where the heck did this crazy method come from? Just heat the area, 
don't cool it. There is no fastener that won't come out with heat but 
the block and manifold have great thermal mass and it takes a lot of 
energy to bring it up to temp. A whimpy propane toruch may not do it 
unless you leave it on there a long time.

The reason this works is that when you heat a fastener the entire 
assembly expands, not just the stud. The nut, bolt and the space 
between them expand together. Every mechanical engineer is taught this
principle in the first year of college. Cooling it will be 
counterproductive.




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