Does anyone know how much heat aluminum foil can hold? Will it talorate 300*+ F? I need to also know can it last at this heat for a long period of time.

Well, I'm no chemist or know much about the properties of aluminum, but I would have to assume that it can withstand the temps for a moderate amount of time. I mean, think about roasting in your oven at 450 degrees for hours on end (i.e. a turkey).

Well, foil can sustain temperatures in excess of 400F in an oven for a prolonged cooking time, so depending on what you are doing it should be fine.

We cooked steak and potatoes in foil while camping right into the fire...it was fine, made good steak too!

I got a call from my boss and he said that his exhaust pipe has crackd and its sepeated from the muffler housing or something. ANyway, I was thinking of ways to fix it till he is able to take the truck to the shop and I was thinking he can wrap the part up with aluminum foil and tie it down with some wire hanger till he get it fixed.

Can't he just run with it cracked until he gets to the muffler shop? Aluminum foil isn't going to stop much of the noisy anyway. :?

The Aluminum Foil will take the heat, but it won't take the pressure. The best "temporary" solution to this problem would be to support the muffler and tail pipe with some metal wire until he can get it to a shop. It'll make a little noise but that'* OK.

Its on the truck and he just don't want to get D.O.T'd.

Aluminum melts at 1220F which is lower than some cars exhaust gas. There are some repair kits he can pick up from parts stores that are fairly simple to use and only cost a couple bucks.