Crank pulley nut removal during engine part out

[David T]

Do you know someone with and oxygen/acetylene torch? The higher heat can get the nut heated faster without heating the crank that much.

I agree you will get a lot more heat with an acetylene torch and an impact gun has a lot more shock than a breaker bar. You can try hitting the long pipe and breaker bar with a hand sledge but it isn't as good as an impact gun.

[nullset]

5 minutes straight of MAPP blow torch, 150 PSI on the compressor aaaaaaand - nothing.
5 more minutes of torching, breaker bar with 12 (!!!) foot pipe aaaaaand - nothing.

WTF now, lol?

What's the rating on your impact gun?

[opethmike]

What's the rating on your impact gun?

1,200 lb/ft

[DMC-81]

5 minutes straight of MAPP blow torch, 150 PSI on the compressor aaaaaaand - nothing.
5 more minutes of torching, breaker bar with 12 (!!!) foot pipe aaaaaand - nothing.

WTF now, lol?

You might as well try this:

-Heat the nut a bit, only the nut, not the shaft.
-Melt some candle wax into the threads. With the nut hot, the wax should be drawn into the threads
-spray some WD-40 or equivalent on the shaft
-Hit it with the impact wrench.
-Repeat if necessary

The idea is to lubricate to threads with the the wax and create a temperature differential with a hot nut and a cooler shaft so that the nut expands slightly on the shaft. I did this successfully on my rusty exhaust hardware.

I modified the procedure from this source: https://www.youtube.com/watch?v=KFdFsfSAuyc

Good luck.