experienced engine builders only.

[scheides]

rebuild, DSMLink, and a tune before you go beating on it again :)

I would just get a new crank, but pull it apart and inspect the damage. Before you do that, do as shane suggests above and look for signs of detonation on the spark plugs/pistons.

[v8klla]

I believe that crank was turned once before, so I don't know that I would recommend it again.

[Goat Blower]

I don't like turning cranks anymore, the only one I've ever had a spun bearing on was a .010" under crank, renitrided and everything. Some people have had great luck with them.

A half-quart high isn't going to make any real difference except maybe a few horsepower at high rpm. A couple extra quarts will.

I have a hard time believing you could knock hard enough to spin a bearing without breaking a ring land or something else. I'd lean towards some sort of oil blockage to that bearing.

[sleepydsm]

Yeah my friend found RTV pluging a bearing oil hole once, no good...

If you can get a new-to-you good condition crank, thats the best path. Check the bearing journals for the hell of it...

[iceminion]

what are the side effects of re-grinding cranks? I know they get slightly weaker.

Goat blower, logically, if you spun a bearing on a turned crank, how can you blame it on the machine work?

I get the impression that turned cranks get weaker, and the side effect is broken cranks.

If nobody has had turned cranks crack and break on them, then I am going to have the crank re-ground for ~$100

Last I checked 6-bolt 4g64 cranks go for upwards of $300, unless I can find a motor in a junk yard. (good luck with all you fuckers picking the junk yards bare, I know, I checked 6 months ago)

[iceminion]

Yeah my friend found RTV pluging a bearing oil hole once, no good...

If you can get a new-to-you good condition crank, thats the best path. Check the bearing journals for the hell of it...

I know you can get RTV all over the place if you use it on your front case and/or oil filter housing. But I didnt. The only RTV on my engine is for the water neck and the oil pan, I highly doubt that any RTV got picked up through the uptake tube, and somehow made it through the filter.

I might be able to have it taken apart on sunday, stay tuned for carnage pics!

[Andrew7dg]

Last I checked 6-bolt 4g64 cranks go for upwards of $300, unless I can find a motor in a junk yard. (good luck with all you fuckers picking the junk yards bare, I know, I checked 6 months ago)

:p

sold one to MAP not that long ago...

[Super Bleeder!!]

Take the crank over to Crankshaft Supply and have them take a look at it. You MAY be able to run the crank with only some polish work put into it if its not FUBAR.

[blageo23]

If nobody has had turned cranks crack and break on them, then I am going to have the crank re-ground for ~$100


$100 my ass.
To check for cranks, Grind, Recoat and balance my crankshaft was $355

[iceminion]

I think for a simple grind its pretty cheap, I know that if I want to re-nitride it I will need to spend upwards of $350

I am sold on using nitride, but its freaken expensive.