Crankshaft repair??
#2741365
02/09/20 08:32 PM
02/09/20 08:32 PM
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Joined: Aug 2009
Posts: 2,042 Mooresburg, Tn
'72CudaRacer
OP
top fuel
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OP
top fuel
Joined: Aug 2009
Posts: 2,042
Mooresburg, Tn
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I just purchased a used short block assembly (500ci MP crate engine) that had damaged the thrust bearing. The crank looks to be worn down on the rear of the thrust surface. (a new thrust bearing fits nice in the saddle, but still a lot of end play) I can measure it when I get the engine disassembled, but the crank looks worn there. I suspect the drive shaft was too long. Is this something that can be repaired, or is it junk? It is a 4.15 stroke crank, most likely a $1000 part if bought now. I bought this for the block (Mega block), but might use this rotating assembly if it can be repaired. Thanks, Brian
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Re: Crankshaft repair??
[Re: '72CudaRacer]
#2741373
02/09/20 08:52 PM
02/09/20 08:52 PM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
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Lots of good cranks out there for under 1000.00.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Crankshaft repair??
[Re: hemi-itis]
#2741466
02/10/20 02:46 AM
02/10/20 02:46 AM
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Joined: Aug 2003
Posts: 43,181 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,181
Bend,OR USA
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Maybe years ago, none now that I know of. Back before anti ballooning plates where added into converters it was not uncommon to loose the thrust surfaces on the bearings and crankshafts
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Crankshaft repair??
[Re: Cab_Burge]
#2741484
02/10/20 09:35 AM
02/10/20 09:35 AM
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Joined: Jan 2003
Posts: 13,365 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
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I've had a couple of cranks repaired by welding up the thrust surface and turning them back down and not had a problem. Not a big deal...local performance machine shop does it for me. Much cheaper than a new crank.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Crankshaft repair??
[Re: Twostick]
#2741693
02/10/20 06:43 PM
02/10/20 06:43 PM
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Joined: Aug 2003
Posts: 43,181 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,181
Bend,OR USA
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Me thinks that 6 bolt stroker crankshaft had issues on the wrong converter I.D. on the crank hub As far as I know Mopar has two different converter hub O.D. sizes, 727 and 904 size hubs
Last edited by Cab_Burge; 02/10/20 06:44 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Crankshaft repair??
[Re: Cab_Burge]
#2741715
02/10/20 07:35 PM
02/10/20 07:35 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,499
So. Burlington, Vt.
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Call Shaft Tech for a price to repair it if you can’t get it done locally.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Crankshaft repair??
[Re: fast68plymouth]
#2741806
02/11/20 01:38 AM
02/11/20 01:38 AM
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Joined: Jan 2003
Posts: 3,831 N.E. Ohio
6bblFLASH
master
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master
Joined: Jan 2003
Posts: 3,831
N.E. Ohio
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Call Shaft Tech for a price to repair it if you can’t get it done locally. That's who did mine. Absolutely no evidence of a repair..PERFECT!! However it was expensive, 700 bucks for thrust repair.
70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!
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Re: Crankshaft repair??
[Re: 6bblFLASH]
#2741813
02/11/20 04:20 AM
02/11/20 04:20 AM
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Joined: Aug 2003
Posts: 43,181 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,181
Bend,OR USA
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Call Shaft Tech for a price to repair it if you can’t get it done locally. That's who did mine. Absolutely no evidence of a repair..PERFECT!! However it was expensive, 700 bucks for thrust repair. Sounds like they really don't want to repair crankshafts to me
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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