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Re: Crank tight
[Re: B1MAXX]
#3033620
04/14/22 05:16 PM
04/14/22 05:16 PM
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Joined: May 2005
Posts: 2,007
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 2,007
Apollo, PA.
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Bore gauge the torqued mains I bet you find out of round. A line hone will fix it up right. I had a 396 one time that the # 5 was almost .009 too wide at one position. You probably have a tight one. Without bearings.
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Re: Crank tight
[Re: B1MAXX]
#3033621
04/14/22 05:31 PM
04/14/22 05:31 PM
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Joined: May 2016
Posts: 630
Ct
Wirenut
OP
mopar
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OP
mopar
Joined: May 2016
Posts: 630
Ct
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Bore gauge the torqued mains I bet you find out of round. A line hone will fix it up right. I had a 396 one time that the # 5 was almost .009 too wide at one position. You probably have a tight one. But why would it show up now vs previously? Just being devils advocate!!!!
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Re: Crank tight
[Re: Wirenut]
#3033631
04/14/22 06:08 PM
04/14/22 06:08 PM
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Joined: Jun 2006
Posts: 427
saint paul mn.
johnzgarage
mopar
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mopar
Joined: Jun 2006
Posts: 427
saint paul mn.
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Did you change from bolts to studs ??? sometimes a bolt or stud will mess things up.
Last edited by johnzgarage; 04/14/22 06:15 PM.
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Re: Crank tight
[Re: johnzgarage]
#3033632
04/14/22 06:09 PM
04/14/22 06:09 PM
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Joined: Feb 2005
Posts: 20,197
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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Did you change from bolts to studs ??? And if so are the studs tight in the main caps.
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: Crank tight
[Re: pittsburghracer]
#3033663
04/14/22 08:34 PM
04/14/22 08:34 PM
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Joined: Jan 2003
Posts: 5,762
Hot Rod Ridge
FastmOp
master
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master
Joined: Jan 2003
Posts: 5,762
Hot Rod Ridge
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Did you change from bolts to studs ??? And if so are the studs tight in the main caps. Heat cycling over time can move and the old bearings wear. At same time. Then new bearings in old bore = oval 
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Re: Crank tight
[Re: Wirenut]
#3033721
04/15/22 07:47 AM
04/15/22 07:47 AM
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Joined: May 2005
Posts: 2,007
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 2,007
Apollo, PA.
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Bore gauge the torqued mains I bet you find out of round. A line hone will fix it up right. I had a 396 one time that the # 5 was almost .009 too wide at one position. You probably have a tight one. But why would it show up now vs previously? Just being devils advocate!!!! Because your main clearance wasn't at .002 with the old bearing/set-up. If your clearance was 1 or 2 thou. more you wouldn't have even noticed it. I'm not suggesting you do this but I bet if scotch-brite the tight but turn-able bearings it would go away.
Last edited by B1MAXX; 04/15/22 07:56 AM.
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Re: Crank tight
[Re: B1MAXX]
#3033735
04/15/22 08:48 AM
04/15/22 08:48 AM
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Joined: May 2016
Posts: 630
Ct
Wirenut
OP
mopar
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OP
mopar
Joined: May 2016
Posts: 630
Ct
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Bore gauge the torqued mains I bet you find out of round. A line hone will fix it up right. I had a 396 one time that the # 5 was almost .009 too wide at one position. You probably have a tight one. But why would it show up now vs previously? Just being devils advocate!!!! Because your main clearance wasn't at .002 with the old bearing/set-up. If your clearance was 1 or 2 thou. more you wouldn't have even noticed it. I'm not suggesting you do this but I bet if scotch-brite the tight but turn-able bearings it would go away. I think your right on here . I think this block may have had main bore alignment issues . As I mentioned it was hard on bearings until I went to a standard x then it all went away . We did measure the bores without bearings and they were spot on spec . Studs in 1 and 5 bolts in the rest and always has been . Called a local shop that can line bore and they can’t take it for a month. I have one more I can try . Thanks for all of the ideas. Just wanted to make sure I wasn’t missing something stupid .
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Re: Crank tight
[Re: B1MAXX]
#3034090
04/16/22 11:48 AM
04/16/22 11:48 AM
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Joined: Jan 2003
Posts: 7,498
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,498
Minnesota
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I suspect that the fore/aft location of the newly ground thrust journal on the crankshaft is off. So the crank is moved further forward or further rearward in the block than it is supposed to be. So the bearing shell is getting into the radius on the #2 crank journal causing the binding. You could put a very thin coat of Permatex Prussian blue on the radiuses of the #2 journal, making sure to not go past the radius with it. Then assemble it, and look for witness marks from the bearing hitting the radius.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Crank tight
[Re: Hemi_Joel]
#3034114
04/16/22 12:46 PM
04/16/22 12:46 PM
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Joined: Dec 2004
Posts: 10,558
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,558
Rittman Ohio
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I suspect that the fore/aft location of the newly ground thrust journal on the crankshaft is off. So the crank is moved further forward or further rearward in the block than it is supposed to be. So the bearing shell is getting into the radius on the #2 crank journal causing the binding. You could put a very thin coat of Permatex Prussian blue on the radiuses of the #2 journal, making sure to not go past the radius with it. Then assemble it, and look for witness marks from the bearing hitting the radius. I would also double check the radius on each journal. You might find #2 bearing will require some carving of the radius contact area. Something to check with an easy fix  Gus 
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Crank tight
[Re: Hemi_Joel]
#3034408
04/17/22 02:10 PM
04/17/22 02:10 PM
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Joined: May 2016
Posts: 630
Ct
Wirenut
OP
mopar
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OP
mopar
Joined: May 2016
Posts: 630
Ct
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I suspect that the fore/aft location of the newly ground thrust journal on the crankshaft is off. So the crank is moved further forward or further rearward in the block than it is supposed to be. So the bearing shell is getting into the radius on the #2 crank journal causing the binding. You could put a very thin coat of Permatex Prussian blue on the radiuses of the #2 journal, making sure to not go past the radius with it. Then assemble it, and look for witness marks from the bearing hitting the radius. I thought about this as well. So I put it all together without the upper or lower thrust bearing . Same result when torquing #2 . Didn’t use the dye . Maybe I should look closer at it .
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Re: Crank tight
[Re: fast68plymouth]
#3034409
04/17/22 02:11 PM
04/17/22 02:11 PM
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Joined: May 2016
Posts: 630
Ct
Wirenut
OP
mopar
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OP
mopar
Joined: May 2016
Posts: 630
Ct
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I’d be looking for a shop with a “line hone”. Yes, trying . Not many around and so far the two I spoke to can’t take it for a month or more .
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Re: Crank tight
[Re: Wirenut]
#3034412
04/17/22 02:18 PM
04/17/22 02:18 PM
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Joined: Aug 2003
Posts: 43,292
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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Last edited by Cab_Burge; 04/17/22 02:22 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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