I was about a hundred miles from the barn, pulling a full load up the mountain, but had lost power, Cummins 500. Hmmm, poor boost, only 20 psi. I made it to the dealer, he plugged in their computer, not finding anything, told me I needed a new /reman turbo, a variable flow type. At $35-3600. none in stock. This one only had about 30 thousand miles on it. So I went back to the barn, and looked everything over to be sure. I had a few short light runs to make. Next time out, I only had 10 psi boost. Kept watching the pyrometer to keep the temp down. Got back to the barn, Looked it over again, this time it was obvious, a hairline crack around the aluminum compressor housing clamp. Searched the 'net and found a used housing and ordered it. Put some vise-grips across the housing and good to go for a while. If used housing doesnt work out, and I need to spend the big bucks, at least my core will be OK, and I won't be charged for a new housing. Now I'm glad I wasn't in a hurry, hope I've saved some money.