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How Hot Is Hot?

  • Thread starter Thread starter snackie
  • Start date Start date
S

snackie

Guest
I've got a couple snapped off valve cover bolts stuck in my head. I'm gonna use a heat gun to try and remove these guys. Question-What temperature should I set the heat gun to?

Thank you.
 
If they are already snapped off, how are you going to remove them even if you get them heated up? vise grips? if they are snapped off below flush in the hole this is where a left hand drill bit can come in handy..
 
Broncoman75 said:
If they are already snapped off, how are you going to remove them even if you get them heated up? vise grips? if they are snapped off below flush in the hole this is where a left hand drill bit can come in handy..
Click to expand...

Luckily, they broke with about 3 threads above the head. So, I'm gonna cut a slot in each and try and turn them out.
 
Try the heat gun first
I doubt a propane torch would damage the aluminum but to err is caution to avoid divine
or something like that.
 
You might be fine with the MAPP bottle, hotter than propane but not so much that you wreck the head. Aluminum expands at a greater rate than steel so heat around the bolt after soaking it with PB.

If its accessible, try your slot idea and an impact tool. Good luck!
 
JEEPRUSTY said:
Try the heat gun first
I doubt a propane torch would damage the aluminum but to err is caution to avoid divine
or something like that.
Click to expand...

I think that's some sort of record for mangled philosophical sayings :p
 
You won't hurt anything with propane, except maybe plastic or gaskets.
 
I just looked it up. the temperature of MAP gas is 5300 degrees F. The melting point of aluminum is 1221 degrees F.
 
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