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Thrust bearing clearance too tight HELP!! #583332 01/15/10 02:02 PM 01/15/10 02:02 PM
Joined: Oct 2007 Posts: 735 New York R/T1968R/T OP super stock
R/T1968R/T OP super stock Joined: Oct 2007 Posts: 735 New York	I installed the crank in a 440 set the thrust bearing then measured the end play and it came up too tight..002 I checked for interference and found none. Can I safely wet sand the thrust surfaces down to achieve.006???

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583333 01/15/10 02:07 PM 01/15/10 02:07 PM
Joined: Jan 2003 Posts: 2,928 Canada R RobR master
RobR master R Joined: Jan 2003 Posts: 2,928 Canada	Give it a poink on the end of the crank snout a couple of times with a heavy dead blow hammer (hard) before you do anything...

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583334 01/15/10 02:18 PM 01/15/10 02:18 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	if your using ARP studs or bolts they'll reduce the movement of the #3 cap.

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583335 01/15/10 02:41 PM 01/15/10 02:41 PM
Joined: Oct 2007 Posts: 735 New York R/T1968R/T OP super stock
R/T1968R/T OP super stock Joined: Oct 2007 Posts: 735 New York	Im using stock bolts. I already tried the hammer method!! Still at .002

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583336 01/15/10 03:01 PM 01/15/10 03:01 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Sand away. No problem. Fastest 300

Re: Thrust bearing clearance too tight HELP!! [Re: Crizila] #583337 01/15/10 04:40 PM 01/15/10 04:40 PM
Joined: Mar 2005 Posts: 1,545 Seattle, WA 3 375inStroke Special needs person
375inStroke Special needs person 3 Joined: Mar 2005 Posts: 1,545 Seattle, WA	Try hitting the crank in one direction, then the other while you pry on it. Then torque while prying.

Re: Thrust bearing clearance too tight HELP!! [Re: 375inStroke] #583338 01/15/10 05:05 PM 01/15/10 05:05 PM
Joined: Jan 2003 Posts: 10,730 North Dakota 6PakBee I Live Here
6PakBee I Live Here Joined: Jan 2003 Posts: 10,730 North Dakota	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".

Re: Thrust bearing clearance too tight HELP!! [Re: 6PakBee] #583339 01/15/10 06:00 PM 01/15/10 06:00 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	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

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583340 01/15/10 06:29 PM 01/15/10 06:29 PM
Joined: Oct 2005 Posts: 8,879 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,879 Ontario, Canada	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.

Re: Thrust bearing clearance too tight HELP!! [Re: Stanton] #583341 01/15/10 07:15 PM 01/15/10 07:15 PM
Joined: Mar 2003 Posts: 8,850 Central Coast, Calif. S Snoopy master
Snoopy master S Joined: Mar 2003 Posts: 8,850 Central Coast, Calif.	Excellent suggestion.

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583342 01/15/10 08:02 PM 01/15/10 08:02 PM
Joined: Oct 2007 Posts: 735 New York R/T1968R/T OP super stock
R/T1968R/T OP super stock Joined: Oct 2007 Posts: 735 New York	I checked the end play with a dial indicator. I used 4 different areas to be safe. As far as the feeler gauge goes there was zero room. I put marking dye on the bearing ends to check against a filet rubbing...nothing.I then 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???

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583343 01/15/10 08:26 PM 01/15/10 08:26 PM
Joined: Jan 2003 Posts: 1,490 smyrna,tn D draginmopars pro stock
draginmopars pro stock D Joined: Jan 2003 Posts: 1,490 smyrna,tn	If all parts aren't original to each other take the thrust bearing out, make sure one of the other bearings isn't binding somewhere. should have excessive clearance. If you end up modding the thrust bearing, take the material off the side toward the front of the block. leaving the T/C or flywheel to thrust toward the factory surface..

Re: Thrust bearing clearance too tight HELP!! [Re: draginmopars] #583344 01/18/10 10:02 PM 01/18/10 10:02 PM
Joined: Oct 2005 Posts: 8,879 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,879 Ontario, Canada	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.

Re: Thrust bearing clearance too tight HELP!! [Re: Stanton] #583345 01/18/10 10:17 PM 01/18/10 10:17 PM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	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.

Re: Thrust bearing clearance too tight HELP!! [Re: Stanton] #583346 01/18/10 10:58 PM 01/18/10 10:58 PM
Joined: Jan 2006 Posts: 704 USA R rftroy super stock
rftroy super stock R Joined: Jan 2006 Posts: 704 USA	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

Re: Thrust bearing clearance too tight HELP!! [Re: rftroy] #583347 01/19/10 01:38 AM 01/19/10 01:38 AM
Joined: Jan 2010 Posts: 3 middleport ohio 45760 R ron-denny member
ron-denny member R Joined: Jan 2010 Posts: 3 middleport ohio 45760	i had same problem ,take bearing out of cap and seeif the cap has a champher on each side and that the bearing is fitting cap correct it may be spreading the bearing, may have to do some fileing on cap!

Re: Thrust bearing clearance too tight HELP!! [Re: ron-denny] #583348 01/19/10 12:44 PM 01/19/10 12:44 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	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

Re: Thrust bearing clearance too tight HELP!! [Re: R/T1968R/T] #583349 01/19/10 04:50 PM 01/19/10 04:50 PM
Joined: Jan 2003 Posts: 2,431 USA S SSAAHemiFan top fuel
SSAAHemiFan top fuel S Joined: Jan 2003 Posts: 2,431 USA	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.

Re: Thrust bearing clearance too tight HELP!! [Re: SSAAHemiFan] #583350 01/19/10 05:41 PM 01/19/10 05:41 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	You have to set the crank first hit it on the back and on the nose with a big ass rubber mallet! then re measure

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