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Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: Dyno1] #1610400 04/23/14 02:50 PM 04/23/14 02:50 PM
Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again Moparnut426 I Live Here
Moparnut426 I Live Here Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again	Like Mike said, I have a small block,and a big block cam with very sharp grooves cut at an angle to cut their way over the high spots in the bearings, Ive done thisto more than a dozen over the years and havent had any issues. SOme I have to cut, some feel great when I drive them in. I have 2 cam drivers, 1 is a OE mopar special tool, and the other is a after the market unit, and I have to say for mopars I like the OE one, you just have to wrap the drivers with black tape to keep from scaring the bearings.

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: Moparnut426] #1610401 04/23/14 03:45 PM 04/23/14 03:45 PM
Joined: Jan 2003 Posts: 25,750 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,750 Rio Linda, CA	Here's a pic of a cam cut to make it a "reamer. According to Rick Ehrenberg all Mopar cam bearings were align bored at the factory so i's unlikely you'll get a cam to fit without some scraping/reaming. 8122008-Cambream.jpg (155 downloads)

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: Clanton] #1610402 04/28/14 10:26 PM 04/28/14 10:26 PM
Joined: Feb 2009 Posts: 110 Grand Forks, ND cougar_cat_25 OP member
cougar_cat_25 OP member Joined: Feb 2009 Posts: 110 Grand Forks, ND	Quote: You may find that when the oil passage was drilled it created a hump in the cam bore and may cause a pinch in the bearing. This is looking like the case. Each oil passage has a pinch. I tried a razor blade and it helped, but I`m worried about a few shutter marks left by the blade when I started or stopped cutting. I have new bearings coming and I`ll try to track down a used cam.

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: cougar_cat_25] #1610403 04/29/14 01:02 AM 04/29/14 01:02 AM
Joined: Aug 2003 Posts: 43,127 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,127 Bend,OR USA	Don't wory about the cutting marks, the cam bearings are very soft for a reason. Once the motor runs for 3 minutes all the marks in and on the cam bearings will be gone, trust me on that Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: John_Kunkel] #1610404 04/29/14 01:08 AM 04/29/14 01:08 AM
Joined: Jul 2008 Posts: 361 Canada onig enthusiast
onig enthusiast Joined: Jul 2008 Posts: 361 Canada	Quote: Here's a pic of a cam cut to make it a "reamer. According to Rick Ehrenberg all Mopar cam bearings were align bored at the factory so i's unlikely you'll get a cam to fit without some scraping/reaming. Just did this on a SB this past weekend. New cam bearings and the cam would not even go in all the way. Used an old cam with diagonal cuts. Made a few passes, cleaning after each pass, then going back in. The new cam now turns with two fingers. I believe that the cam bearing manufacture, Dura-Bond, which probably makes them for everybody, builds them a little thicker. I have never heard or experienced this 20 or 30 years ago. Seams to be a common issue nowadays. Just my thoughts. Last edited by onig; 04/29/14 01:11 AM. 69 Dart

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: onig] #1610405 04/29/14 11:10 AM 04/29/14 11:10 AM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Do not remove and reinstall the same cam bearing,you may lose the "crush"fit value and have it spin or move out later.If you do and the fit feels loose use sleeve retainer compound and let it setup. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: B G Racing] #1610406 04/29/14 04:57 PM 04/29/14 04:57 PM
Joined: Oct 2012 Posts: 235 Gilbert AZ tsanchez enthusiast
tsanchez enthusiast Joined: Oct 2012 Posts: 235 Gilbert AZ	I keep an old cam around and smack on a 3/4 alum dowel thru the lifter holes to make the cam seat the cam bearing into the bore, sometimes when the bearing passes the holes it distorts, I hit them from both side at each bearing and from the crank area a few times and they spin up nice and clean without removing any material.

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: cougar_cat_25] #1610407 04/29/14 07:51 PM 04/29/14 07:51 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: Quote: You may find that when the oil passage was drilled it created a hump in the cam bore and may cause a pinch in the bearing. This is looking like the case. Each oil passage has a pinch. I tried a razor blade and it helped, but I`m worried about a few shutter marks left by the blade when I started or stopped cutting. I have new bearings coming and I`ll try to track down a used cam. You could take a fine file like a 1/2 round and just do a couple swipes with light pressure or a 1" dowl rod with sand paper stapled to it but I would go more with the file.You wont need to do much to get rid of the hump.Do what you can with the bearings in there and you have the new for a backup if you don't like your results.jmo. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: Clanton] #1610408 04/29/14 08:53 PM 04/29/14 08:53 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: Quote: You may find that when the oil passage was drilled it created a hump in the cam bore and may cause a pinch in the bearing. This is looking like the case. Each oil passage has a pinch. I tried a razor blade and it helped, but I`m worried about a few shutter marks left by the blade when I started or stopped cutting. I have new bearings coming and I`ll try to track down a used cam. You could take a fine file like a 1/2 round and just do a couple swipes with light pressure or a 1" dowl rod with sand paper stapled to it but I would go more with the file.You wont need to do much to get rid of the hump.Do what you can with the bearings in there and you have the new for a backup if you don't like your results.jmo. If this was the case you would ALWAYS see the bearing tight in that area... on my last build I seen it tight most of the way around.. better than half way... I used my cam sizer(old cam with the cuts) to correct the fit.. I just spray cutting fluid in while I spin it with my impact wrench(slow at first) then give it a full shot... I've never had a cam bearing failure

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: MR_P_BODY] #1610409 04/29/14 09:44 PM 04/29/14 09:44 PM
Joined: Aug 2003 Posts: 43,127 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,127 Bend,OR USA	I have seen cams that where bent, turned easy for half a rotation and not the rest of the way Lots of gremlins out there, check the cam first for straightness Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: MR_P_BODY] #1610410 04/29/14 10:25 PM 04/29/14 10:25 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	If he ends up yanking the bearings there will be a story mark on the bore also showing high/low spots. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: Cab_Burge] #1610411 04/30/14 12:53 AM 04/30/14 12:53 AM
Joined: Feb 2005 Posts: 4,884 Michigan MNobody master
MNobody master Joined: Feb 2005 Posts: 4,884 Michigan	Absolutly, i had a shop put bearings in my 440 years ago and the cam wouldn't fit when i got it home and tried to assemble it, took it back, they did them again and i had the same problem. I took them the cam both times but i guess they never thought to check it for straight, it was out .003 and was a used purple shaft cam.

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: cougar_cat_25] #1610412 05/29/14 08:15 PM 05/29/14 08:15 PM
Joined: Feb 2009 Posts: 110 Grand Forks, ND cougar_cat_25 OP member
cougar_cat_25 OP member Joined: Feb 2009 Posts: 110 Grand Forks, ND	Not to dredge up an old post, but I found a used cam and cut grooves into it. Installed new bearings and shaved them with the new tool. A++ idea, works great.

Re: New cam bearings, takes 24 ft lbs to turn cam. [Re: cougar_cat_25] #1610413 05/30/14 12:06 AM 05/30/14 12:06 AM
Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A. roadhazard master
roadhazard master Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A.	Quote: Not to dredge up an old post, but I found a used cam and cut grooves into it. Installed new bearings and shaved them with the new tool. A++ idea, works great. Good deal Never hurts to follow up on a thread

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