I got this sbc for free,throw´d away the brocken rods and crank that did a big hole in the oilpan. is it possible to use this block anymoore? or is it a pice of s***? the block seems to be in good condission exept that it is missing small pieces of metal in the lower part of the cylider´s. so keep or throw away?
i have a sbc 350 thats bored .60 over and it has very very small pieces broken off like yours but not on every cylinder bore..the machinist said it should be ok b.c the piston doesnt go that far down
since it's just a 350 I'd junk it....but the 340 in the wife's dart has a similar chunk missing from one bore, was like that when I got the block, I rebuilt it and she's put a bunch of mile on it and still runs ok. The piston skirt does go down that far, and that piston won't be full supported, but if it's the only blockyou can find it might be ok for mild use. Like I said, it's just a 350 bellybutton....
Yea it´s only a 350 but idont like to throw away thing´s. I have a couple more. this one are gona go in my 52 p/u...................
Okay, the fact that you're in SWEDEN means this "belly button" Chevy 350 probably isn't nearly as common as most of the guys here are saying. I've seen engine build stories where the bottom of the cylinders were notched and the pan rail was notched to clear a big stroke crank... I'd like to see an opinion from some engine builders here about deburring the edges on that notch, mag checking the block, and running the engine in a street car. I don't have that much first hand experience, but it really seems to me that at the very bottom of the cylinder like that, if nothing else is cracked or distorted, and it'll clean up with a decent overbore, I'd run it. Again, it's in Sweden. What would we do if it were a Flathead, Nailhead or Hemi Head with the same damage? How many cylinders are nicked like that? -Brad
Have the block checked out before you build it. What else can you do? In the future if you do have a cracked piece in a place that doesn't matter structuraly get some cast iron stick rod knock off the fulx and tig it. We fixed a lot of blocks that way when I was racing.
I can't see enough in those dark pix for an intelligent comment.However it is as mentioned earlier very common to take fairly large bites out of the bottom of the cylinders and the pan rails for rod clearance on stroker or aluminum rod motors. T.OUT
Mag it and pressure check if possible. If it doesn't go into the water jacket it shouldn't hurt anything. I'd debur it and make sure the cylinders were still round.
Have it magged. If it passes, use a grinder to take off any ragged edges. As stated before. Stroker motors are cut just about as high in the cylinders. There is no danger of water unless cracked. Been building motors professionally since the sixties. LOTS of drag race motors out there with a cylinder or two like that. The stocker type piston skirts do go down that far but there is still plenty of support. Been there done that!!
Okay guys thank´s a lot for the info. yee im i sweden and it´s not every day i can pick up a block for free or for desant money either. so it gona be a keeper thanks.
I must live in the wrong place. I haven't been offered a free 350 SBC in years and while we used to pull them when we junked a family or friend's car, I haven't seen too many in the Cavaliers, Taurus's, Mitsubitchys and Hondas the family's had for the last several years. Next time you get one of those free bellybuttons, please send it to me. I'd take that Ho Hum Turbo 350 or 400 too. I'm fresh out of fresh bellybuttons. All I have left is the lint.
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