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Re: New cam bearings, takes 24 ft lbs to turn cam.
[Re: cougar_cat_25]
#1610383
04/21/14 10:19 PM
04/21/14 10:19 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
I've heard of tight or misaligned bearings but is 24 ft lbs too much torque too turn a 440 cam?
Absolutely to tight. But guess what, Very common with new bearings. The common fix is to scrape the high spots off with a bearing knife. Never saw one myself. The second common way is to take a used cam and cut a groove across each cam journal and spin it in the bearings untill you have them clearanced.
A third uncommon way is to have the blocks cam journals bored or honed to proper size/??? Most just clearance the bearings. It sucks, I know.
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Re: New cam bearings, takes 24 ft lbs to turn cam.
[Re: dvw]
#1610387
04/21/14 11:14 PM
04/21/14 11:14 PM
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Joined: Aug 2003
Posts: 4,676
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,676
On the parachute mount
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I made a bearing scraper out of a broomstick cut short, about 3 feet long.. Cut a small slit that a razor blade fit in. Worked real nice. As mentioned already, turn an old cam in there to make some shiny/visible high spots. Scrape them down, retry cam. Just keep doing it until you have it rotating freely. Just takes time and patience
....BAD A$$ STREET CAR.....
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Re: New cam bearings, takes 24 ft lbs to turn cam.
[Re: cougar_cat_25]
#1610388
04/21/14 11:20 PM
04/21/14 11:20 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I've heard of tight or misaligned bearings but is 24 ft lbs too much torque too turn a 440 cam?
24ft lbs is about 24 ft lbs to much... it should be
able to spin with your fingers... I dont even have 24
ft lbs to turn my engine without the rockers... I have
a old cam with the grooves cut in it to size the
cam bearings
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Re: New cam bearings, takes 24 ft lbs to turn cam.
[Re: cougar_cat_25]
#1610390
04/21/14 11:42 PM
04/21/14 11:42 PM
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Joined: Aug 2003
Posts: 4,676
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,676
On the parachute mount
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If you want tomminimize trash in the engine, put some grease on the razor blade and scrape in one direction only, the grease will catch all the scrapings,just go slow. It works well !
....BAD A$$ STREET CAR.....
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Re: New cam bearings, takes 24 ft lbs to turn cam.
[Re: Crizila]
#1610393
04/22/14 01:44 AM
04/22/14 01:44 AM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Quote:
Quote:
[ The second common way is to take a used cam and cut a groove across each cam journal and spin it in the bearings untill you have them clearanced.
diagonal groove(s). that'd be the way I would deal with this, & clean the shavings
Hey Robert .  thats what I do. Took and old cam and cut diagonal grooves in the journals. A couple of passes throught the cam bearings and your good to go.
Yep, diagonal groove  I didnt specify. It helps with the cut and the flow of the shavings for cleanup. It will take more then just a couple of passes though, in most cases.
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All kidding aside your deal is not uncommon, maybe one in ten blocks are that way 
Take it to a competent machine shop and have them fit the cam to the cam bearings as already suggested 
I bought a bearing knife for that reason so I can do them myself, I install one cam bearing at a time and then trial fit the cam, once the first journal fits and turns easily I do the next one and so on.
