Help!! Scratched Crankshaft!!
03-25-2002, 07:04 AM
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Car: 1991 Firebird
Engine: 427 LSX
Transmission: Turbo 400
Help!! Scratched Crankshaft!!
Ok, I am an idiot. When I was removing the rods from my crankshaft (just turned 20 under) I put a small scratch in the journal. Can I just polish this out? Thanks
03-25-2002, 08:20 AM
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Car: 4
Engine: 6
Transmission: 5
Depends on how "small"...
I wouldn't run it. The cost of building up and installing a motor with a fornicated crank, then discovering it when it blows up, then having to re-do it, is so much greater than a regrind, it's not worth the risk.
I wouldn't run it. The cost of building up and installing a motor with a fornicated crank, then discovering it when it blows up, then having to re-do it, is so much greater than a regrind, it's not worth the risk.
03-25-2002, 09:12 AM
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Car: 1991 Firebird
Engine: 427 LSX
Transmission: Turbo 400
oh, if the bearings say ".020" does that mean 20 under or .010 under?? Like a radius or diameter thing??
03-25-2002, 09:13 AM
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IMO, unless this is going in a put around town vehicle i wouldn't even use anything more than 10 or 15 reground in anything i build. just me though. if the bearings say .020 then they are .020
03-25-2002, 09:57 AM
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Car: 92 Form, 91 Z28, 89 GTA, 86 Z28
Engine: 5.7 TPI, LG4
Transmission: 700R4, 700R4
Axle/Gears: 3.27, 2.73
Do you have a digital camera?
That would help these guys help you here. I had a scratch in my crank that the machine shop put there, and I still used it. 90000 miles later, it is still going. But, the scratch didn't stick out at all, and it was for an LG4, with no mods. And I see that isn't exactly what you're running.
If you have the cash handy, a new crank won't hurt.
Good Luck,
Jeremy
That would help these guys help you here. I had a scratch in my crank that the machine shop put there, and I still used it. 90000 miles later, it is still going. But, the scratch didn't stick out at all, and it was for an LG4, with no mods. And I see that isn't exactly what you're running.
If you have the cash handy, a new crank won't hurt.
Good Luck,
Jeremy
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