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I just wanted to know if a crank gernal thats around .070 out of round is worth having repared , or would I be better off to find another crank & rods. The bearings already say that thier .010 over.This is a 1961 261 motor . Thanks Don

.070"??? Are you sure? My sparkplugs aren't gapped at .070". Now .007" is a different story.

Since you can turn that crank a maximum of .030" under and its already .010",
.030"-.010" is .020" meat left on journals.
So .020"-.007" is .013" extra, so you're OK if runout/wear is .007"

If you actually have .070" runout, you've got a 80 lb boat anchor.

Somebody check my math.

Chiphead

There has got to be a decimal place error here for in order to create wear, the engine had to be running. I don't think you could get to .070 out of round without it going to pieces.

Exactly. Last year I dismantled a '67 Poncho 400 motor that had a .070"-.100" gouge on a rod journal... When it barfed a rod through the oil pan. :o

Chip

Gentlemen , this is the measurments I found , I already talked to a fellow inlinner , and he told me I was sunk . The good news is , "if there is any", I still have a couple of motors to dissasemble to find a usable crank. I am trying to to do this as inexspensive as posible, like evry body else. This motor is the cleanest I have worked on yet. I sure hope the block is good.I plan on making this motor a little hot rodded, so if I have to find good parts , I will. I took these measurments in my garage , with my tools , there is room for error. thanks

Hope you can salvage a crank out of the other engines. When you finish, post the parts you don't need on the swap meet. That's what I'm going to do when I finish my 235.

Good luck

Chip

Hey Jr. do me a favor and save all those worn out cranks, I need fence posts for the back yard. Seriously, I think you can use a 235 crank in that 261 just fine.

I am planning to make a table lamp out of worn 302 crank and flywheel. Also thought about making a coffee table using a 302 block for the base with a glass table surface. Can't stand to get rid of this stuff but can't afford to use it.

I hope you plan to beef up your floor, that will be one heavy coffee table, and who wants a 100 lb lamp? You could use a big ol air filter for the shade.

I am sure glad I made every body laugh. This is the first engine I will be doing myself. Someone told me I could have the crank built back up and returned , without any problems. And that's why I come here, I get several responses to a single question . When all the answers are the same , it's pretty simple. I figured that this crank was a wash when I first saw thaat it took alot of crank movement to make the #6 piston move , when I first took the head off. Thanks a lot guys for the humor. I will send the crank to "JiMerit", for a fence post. Don