I got mine opened up today and the crank has already been turned .010 on the rods and .020 on the mains. It needs to be ground again from the looks of the bearings. Can it be turned further or is time to toss it and get a fresh crank?


Thanks,
Mike

 

You can buy bearings up to 40/40.

john

 

well lets start a hornets nest i dont recommend turning past
20 there are lots of cranks out there and they are readily avalible

 

Agreed with Merc... There are an abundance of cranks out there, many of which can be found still in STD size... remember, the more meat you have round your mains, hte stronger hte crank will be... I mean, 10/10 doesnt significantly weaken the crank, considering the large portion of metal there already, but still.. More is better, any way you look at it.
Most of the cranks out there can be found for really reasonable prices, too... like under a hundred dollars, for example.. I know my local machine shop sells reconned cranks, already prepped and ground and polished for 190 bucks..10/10 under and polished. Look around, they are out there, but yea... definitely try and find another one instead of using that one AGAIN..
best of luck to ya....

J/.c

1965 Ford Galaxie 500 (okay, so not quite a truck)
ANOTHER 460/C6 @ 365hp/519 lb.ft.
14.36@100.4, 16-18 mpg AHHAAAHAAAHAAA!

 

The main and rod journals on a 460 crank are 3" and 2.5" respectively. If you can't take a lousy .040 off of that, then those cranks are total junk. A 428 crank has more stroke than a 460 and the main and rod journals are 2.749 and 2.438 respectively. So, by the ".030 is too much" logic, a standard 428 crank is way too thin. One other thing, they take a lot more than .040 off of a crank when they make a stroker. Just my .02
Kevin

 

I agree completely. Never seen a broken crank that didn't fail due to some other problem.

Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi

 

Hey, what about this....when you turn the rod journals .040, and the mains .040, doesnt this throw the entire rotating assembly out of balance? The thicker bearings wont make up for the lost weight because cast iron is denser (heavier) than the steel shells on the bearings. Just wondered
btw, I ran my truck yesterday for the first time since I built the new 460, I was proud to see a 11.17 on the very first pass, with no jetting, timing, no tuning at all! Talk about torque with a capital "t"...lol

 

Mavman, since all weight that is taken off any point the crank is matched by weight removed 180 degrees across, the center of gravity of the crank should not be changed. Hence no balance problems in turning rods or mains provided they are all turned equally.

I have seen some abortion rebuilt small blocks where some rod throws were turned .030, others .010. That is nuts.

 

oh, yea...why didn't I think of that before?? thanks cougar!