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Camshaft End Float #2684551
08/05/19 07:39 AM
08/05/19 07:39 AM
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Queensland Australia
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moparmacka Offline OP
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Just installed my new SB solid roller cam with a Milodon gear drive and after everything is buttoned up, I found it has 0.015 end play/float. The Mopar bible says 0.010 max. Anyone else had this amount? Am I stressing about nothing?
Cheers Macka

Re: Camshaft End Float [Re: moparmacka] #2684572
08/05/19 09:06 AM
08/05/19 09:06 AM
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Great Neck,LI,new york
hemi-itis Offline
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Are you using a button? Milodon cover has a boss for the button and the cover comes right off.Spec is spec................ whistling


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Camshaft End Float [Re: moparmacka] #2684603
08/05/19 10:19 AM
08/05/19 10:19 AM
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Washington
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Originally Posted by moparmacka
Just installed my new SB solid roller cam with a Milodon gear drive and after everything is buttoned up, I found it has 0.015 end play/float. The Mopar bible says 0.010 max. Anyone else had this amount? Am I stressing about nothing?
Cheers Macka



That's WAY too much. The way you correct that is by machining the back side of the hub in a lathe. That will take up what is essentially cam thrust.

FWIW, I been using that gear drive for decades and I keep the thrust down to .005 max and like it at about .003. It has that roller thrust bearing. It doesn't need all that play.

Also, look down the lifter bores and I'd bet when you correct the end play, the lobe will be more centered in the lifter bore.

I'd fix that.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Camshaft End Float [Re: hemi-itis] #2684737
08/05/19 04:40 PM
08/05/19 04:40 PM
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moparmacka Offline OP
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On a SB the thrust is regulated by the thrust plate?

Re: Camshaft End Float [Re: madscientist] #2684740
08/05/19 04:44 PM
08/05/19 04:44 PM
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moparmacka Offline OP
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I was thinking that machining the back of the hub would increase the distance. But the way it works by compressing onto the thrust washer and Torrington, it’s does the opposite to what I thinking. It actually decreases the distance.

Re: Camshaft End Float [Re: madscientist] #2684742
08/05/19 04:48 PM
08/05/19 04:48 PM
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moparmacka Offline OP
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P.S thank you for the tip.....

Re: Camshaft End Float [Re: madscientist] #2685051
08/06/19 05:27 PM
08/06/19 05:27 PM
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moparmacka Offline OP
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I take it this morning he area that needs to be machine down to close up the distance.

B3D7BE57-83E5-426B-AA6C-52583E0B4AC7.jpeg
Re: Camshaft End Float [Re: moparmacka] #2685068
08/06/19 06:16 PM
08/06/19 06:16 PM
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Originally Posted by moparmacka
I take it this morning he area that needs to be machine down to close up the distance.


It's a bit hard to tell from the picture, but you want to machine down the hub where it faces the cam, not the timing chain cover. Does that make sense? To get the lash out of the system, you want to pull the hub closer to the cam...or IOW's, you'll be pulling the cam forward in the block.

The inner ring is what you machine.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Camshaft End Float [Re: madscientist] #2685180
08/07/19 12:02 AM
08/07/19 12:02 AM
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moparmacka Offline OP
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Got it....thank you once again!

Re: Camshaft End Float [Re: moparmacka] #2685196
08/07/19 01:59 AM
08/07/19 01:59 AM
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Bend,OR USA
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Are you checking the end play with the oil pump and oil pump drive installed and the lifters preloaded like the motor will be ran like ? if not maybe you should up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Camshaft End Float [Re: Cab_Burge] #2685207
08/07/19 04:56 AM
08/07/19 04:56 AM
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Good call.

Re: Camshaft End Float [Re: Cab_Burge] #2685226
08/07/19 08:14 AM
08/07/19 08:14 AM
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Originally Posted by Cab_Burge
Are you checking the end play with the oil pump and oil pump drive installed and the lifters preloaded like the motor will be ran like ? if not maybe you should up


The lifters and oil pump drive do not control camshaft end play. The hub does.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Camshaft End Float [Re: moparmacka] #2685231
08/07/19 08:33 AM
08/07/19 08:33 AM
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I used a small piece of shim stock behind the button. Also, not all cover gaskets are the same thickness - the Superformance gaskets are WAY thicker than a stock gasket and of course if you use RTV instead of a gasket well, there is no thickness there at all. So getting perfect end play "out of the box" is highly unlikely.

Sorry, I'm talking big block and just noticed the OP is talking SB.

Re: Camshaft End Float [Re: madscientist] #2685381
08/07/19 03:55 PM
08/07/19 03:55 PM
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moparmacka Offline OP
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Just machined the hub and ended up with 0.004”.
Awesome.

Re: Camshaft End Float [Re: moparmacka] #2685414
08/07/19 05:02 PM
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Originally Posted by moparmacka
Just machined the hub and ended up with 0.004”.
Awesome.



Very nice. It doesn't get much better than that!!


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston






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