Quote:
Originally Posted by crispo-71
thanks guys... very helpful info.. this will be my 1st block i will be taking to a machine shop.. what should i ask for???
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It depends on how much you want to spend. I just had my 250 done. Here's what they did, some of it necessary, some of it nice to have:
1. They baked the block in a big oven to get rid of the grease/oil/coolant residue. Some shops use a hot tank.
2. Chase threads. This cleans out the threads so there's no junk in there (that falls out later in the build and ends up in your engine) and you get accurate torque readings on critical fasteners.
3. Overbore. Mine needed it.
4. Deck the block. This makes for a nice flat surface for the head to mount to. You want to take the minimum amount of material so it doesn't affect pushrods and whatnot.
5. Align-bore the main bearings. It should at least be checked.
6. Check the cam bearing alignment.
7. New freeze plugs.
8. New main and rod bolts.
That said, I tend to be a little paranoid about this stuff, so others may have different opinions on what is required.