[Vwdiesel] Not VW, but diesel and relevant

[Val Christian]

A piece of equipment that gets parked outside has rot through the exhaust 
manifold of it's 23 hp engine. I was wondering if I could blast it clean,
and then do something like shape a nickle or something to overlay the 
hole and brase it in place.  I would probably pre/post heat on a gas grill
with a target of 300 to 500F.

Any thoughts?  Oh, the engine is on a Ford 1510 tractor, which is a 3 cyl
NA diesel.  It is "young" with about 2200 hours on it.  Starts OK, runs OK,
smokes a little under load, and has the original injectors.

If there is an alternative fixing methodology, I am open to it.