Re: Thrust bearing clearance too tight HELP!!
[Re: 375inStroke]
#583338
01/15/10 05:05 PM
01/15/10 05:05 PM
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Joined: Jan 2003
Posts: 10,931 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,931
North Dakota
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Before you get carried away sanding, set the insert in the cap, take a feeler gauge and make sure the flanges are tight against the cap. If not use a wood block and carefully massage the flanges to be tight against the cap. Do the same thing to the other bearing insert. The reason I mention all this is that I sanded a thrust for clearnace one time and near the end discovered the flanges had been 'cupped' at the edges.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Thrust bearing clearance too tight HELP!!
[Re: 6PakBee]
#583339
01/15/10 06:00 PM
01/15/10 06:00 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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What he said a good visual for anything abnormal and when (if) you sand have someone hold the piece of fine sandpaper on a piece of glass so you have both hands free to hold both halves together & sand them in a figure 8 pattern.
live every 24 hour block of time like it's your last day on earth
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Re: Thrust bearing clearance too tight HELP!!
[Re: draginmopars]
#583344
01/18/10 10:02 PM
01/18/10 10:02 PM
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Joined: Oct 2005
Posts: 9,031 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 9,031
Ontario, Canada
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Quote:
take the material off the side toward the front of the block. leaving the T/C or flywheel to thrust toward the factory surface..
Not contradicting this but wondering the reason why.
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Re: Thrust bearing clearance too tight HELP!!
[Re: Stanton]
#583345
01/18/10 10:17 PM
01/18/10 10:17 PM
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Joined: Mar 2003
Posts: 15,493 the boonies
aarcuda
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 15,493
the boonies
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because when they wear, they wear that side- like the torque converter is pushing the crank forward
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.
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Re: Thrust bearing clearance too tight HELP!!
[Re: Stanton]
#583346
01/18/10 10:58 PM
01/18/10 10:58 PM
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Joined: Jan 2006
Posts: 705 USA
rftroy
super stock
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super stock
Joined: Jan 2006
Posts: 705
USA
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Quote:
Are you measuring end play by moving the crank back and forth? If so, before you do ANYTHING check the clearances between the thrust and the crank with feeler gauges to be sure the bearing is the problem. Could be one of the other bearings is touching a filet and not letting the crank move as it should.
Reread the above. You need to first check the clearance out of the block.
Take the crank and put it on a workbench or table away from the block. Place the bearing caps, one at a time, on the #3 journal and measure the clearance with feeler gauges. If it is OK, then you have a problem that will not be fixed with sanding. Bob
AAR 4-speed 3.91, Tor-Red; 70 440 6 pack Roadrunner 4-speed 3.54, Plum Crazy; 68 Formula S conv 383 4-speed 3.23, Electric Blue; 69 Barracuda conv Slant 6 OD4 2.94, 71 B5 Blue; 78 Lil' Red Truck, Red; 70 Challenger S/E. 505 6 pack, Passon 5-speed, 3.55, B7 Blue
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Re: Thrust bearing clearance too tight HELP!!
[Re: ron-denny]
#583348
01/19/10 12:44 PM
01/19/10 12:44 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Some very good suggestions on this thread, but if all the suggested checks were made - and to answer his ORIGINAL question, wet sanding the thrust surfaces to gain clearance is ok to do - IMO.
Fastest 300
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Re: Thrust bearing clearance too tight HELP!!
[Re: R/T1968R/T]
#583349
01/19/10 04:50 PM
01/19/10 04:50 PM
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Joined: Jan 2003
Posts: 2,431 USA
SSAAHemiFan
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,431
USA
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Quote:
I tried reinstalling an old bearing and there was .006 so I miked the over-all width and found the new bearing was indeed wider by almost .005 maybe the plating was too thick???
Check with the manufacturer to be sure your new bearing is in spec.. You just want to make sure your old bearing isn't worn and that's why there is a difference.
99% sure the problem will be with the new bearing tolerance but theres always a chance !
Once the width is the confirmed problem - sand away!
The figure 8 on a flat surface mentioned above is the best way.
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