Re: Hemi spun main bearing
[Re: 8pack]
#2620309
02/12/19 04:35 PM
02/12/19 04:35 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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You need to figure out why that bearing spun so you can fix that so it won't do that again Which one spun? How much use, miles on it, before it broke? I've never heard of larger outside diameter main bearings, you will need to have the block fixed before using it again Do you have a really good machine shop to use? If not find one They may need to metal spray the bad bearing cap and the block so they can align hone it when done
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Hemi spun main bearing
[Re: 8pack]
#2621005
02/13/19 10:34 PM
02/13/19 10:34 PM
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Joined: Jan 2012
Posts: 2,678 Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,678
Stuttgart, Arkansas
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I agree with Cab. Hemi blocks don't have a reputation for spinning main bearings. I would want to know why it did it. Or we could be right back here next month with the same questions.
2011 Drag Pak Challenger
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Re: Hemi spun main bearing
[Re: 8pack]
#2621013
02/13/19 10:53 PM
02/13/19 10:53 PM
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Joined: Jan 2003
Posts: 5,122 Chicago Blackhawks
hemicar1971
master
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master
Joined: Jan 2003
Posts: 5,122
Chicago Blackhawks
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Would like to see a few picture of what happened with the block and bearing and crank. Post some and you will likely get the answer or a direction you likely should go in to fix the problem. I agree with Cab and every one else does I would think. Need to find the problem before you can fix the problem.
1971 HEMI E BODY REGISTRY
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Re: Hemi spun main bearing
[Re: 8pack]
#2623656
02/20/19 12:42 PM
02/20/19 12:42 PM
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Joined: Apr 2007
Posts: 289 Lowes
steve660
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 289
Lowes
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If its an automatic i'd be checking if the converter is preloading the crank. Happens more than you think.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure. ..... Now its a door stop....
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Re: Hemi spun main bearing
[Re: DoubleD]
#2623771
02/20/19 04:23 PM
02/20/19 04:23 PM
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Joined: Nov 2003
Posts: 1,841 NW Indiana
fbs63
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,841
NW Indiana
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First thing I would check is how far the input shaft of the tranny goes into the crank - my guess is you are bottomed out against the crank - many aftermarket cranks are not drilled deep enough. This.
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