My F20B motor had been in an accident. (In Japan) well I ended up buying the motor unknowing of damage to the block. Anyways it had some broken bolts, and a major crack at the driver side motor mount. So here is the aftermath....

 

How many amps did it take to pull that off?

 

I know on a 1' x 1' section of 3/8" thick aluminum I was pushing 350 amps with a preheat. I'm sure if you let the arc sit there for a while you can do it on a lower amperage with a preheat on something as large as a block. Never tried though, for the simple fact that it should still be machined flat, not ground down with a hand grinder. Hope you don't get any leaks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedinnovations &raquo;</TD></TR><TR><TD CLASS="quote">How many amps did it take to pull that off? </TD></TR></TABLE>

180 amps Pure Argon, no helium mix. AC of course...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by backpurge &raquo;</TD></TR><TR><TD CLASS="quote">I know on a 1' x 1' section of 3/8" thick aluminum I was pushing 350 amps with a preheat. I'm sure if you let the arc sit there for a while you can do it on a lower amperage with a preheat on something as large as a block. Never tried though, for the simple fact that it should still be machined flat, not ground down with a hand grinder. Hope you don't get any leaks. </TD></TR></TABLE>

If it were on the other side of the block we would not have done it. Because of the location were confident it is going to seal fine.


**Head is in final stage of being torqued down. **

 

i hope you used some copper spray at least.