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Roller cam end play #553587
12/14/09 09:47 AM
12/14/09 09:47 AM
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Clinton Township, Michigan
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Dartin Offline OP
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I'm curious about the different methods you guys with big blocks are using to set the end play on your roller cams. I'm using a cam button with a stock timing chain cover. I learned the hard way that the cover has too much flex. I had an aluminum "puck" epoxied to the water pump housing that put some pressure on the cover, but that came loose somewhere along the way and the cam gear bolts started eating the cover.

Re: Roller cam end play [Re: Dartin] #553588
12/14/09 10:27 AM
12/14/09 10:27 AM
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Eighty Four, PA
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That's why I like aluminum covers,but welding a extra layer of metal inside or outside the stock covers usually cures the flexing problem.

Re: Roller cam end play [Re: B G Racing] #553589
12/14/09 11:36 AM
12/14/09 11:36 AM
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Davenport, IA
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I drilled and tapped a small hole in the water pump housing in line with the cam. Then installed a set screw and adjusted it to about .002 clearance between it and the front cover. I sealed the set screw with teflon pipe dope. I have about 2000 miles on it with no problems.


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Re: Roller cam end play [Re: Dartin] #553590
12/14/09 11:39 AM
12/14/09 11:39 AM
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Hughes Engines has billet covers that fit under a stock water pump. The center section is removeable so you can easily set the end play. They also have a three piece roller button that fits the cover.

5667009-406cover.jpg (74 downloads)
Re: Roller cam end play [Re: AndyF] #553591
12/14/09 11:44 AM
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Close up of the button

5667016-button2.jpg (73 downloads)
Re: Roller cam end play [Re: AndyF] #553592
12/14/09 11:45 AM
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Setting end play is easy. The cover comes with a set up plate that has a large hole in it for the dial indicator.

5667019-button3.jpg (55 downloads)
Re: Roller cam end play [Re: AndyF] #553593
12/14/09 04:22 PM
12/14/09 04:22 PM
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Clinton Township, Michigan
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Dartin Offline OP
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That is a beautiful piece but looks pricey. I'm using a motor plate and probably have room for a cast aluminum one. Who makes/sells them?

Re: Roller cam end play [Re: B G Racing] #553594
12/14/09 04:26 PM
12/14/09 04:26 PM
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Dartin Offline OP
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Quote:

That's why I like aluminum covers,but welding a extra layer of metal inside or outside the stock covers usually cures the flexing problem.





Bob, about how thick on the outside do you think would eliminate the flex?

I also like the idea of drilling and tapping the housing.Hhhmmm...

Re: Roller cam end play [Re: 70shaker] #553595
12/14/09 04:45 PM
12/14/09 04:45 PM
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Quote:

I drilled and tapped a small hole in the water pump housing in line with the cam. Then installed a set screw and adjusted it to about .002 clearance between it and the front cover. I sealed the set screw with teflon pipe dope. I have about 2000 miles on it with no problems.



I to you for coming up with a simple effective way to solve it.

Re: Roller cam end play [Re: blownzoom440] #553596
12/14/09 05:19 PM
12/14/09 05:19 PM
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Richmond Va, KeislerTKO 60...
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how did you measure the 0.002" between the pump and the cover?

Re: Roller cam end play [Re: Dartin] #553597
12/14/09 06:58 PM
12/14/09 06:58 PM
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Eighty Four, PA
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Quote:

Quote:

That's why I like aluminum covers,but welding a extra layer of metal inside or outside the stock covers usually cures the flexing problem.





Bob, about how thick on the outside do you think would eliminate the flex?

I also like the idea of drilling and tapping the housing.Hhhmmm...


Add a strap of 1/16 steel inside or out and tackweld it in numerous spots to stiffen the cover.Indy makes a cast aluminum cover as well as others mentioned.Indys cover runs between $110 and $125 depending on who you buy from.

Re: Roller cam end play [Re: B G Racing] #553598
12/14/09 07:12 PM
12/14/09 07:12 PM
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with these alum. covers will the balancer hub be different? i have an ati.

Re: Roller cam end play [Re: 68roadrunner] #553599
12/14/09 07:44 PM
12/14/09 07:44 PM
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The billet cover that I posted pictures of fits with stock water pumps and stock dampers. The Indy cast cover doesn't. The Indy cover also doesn't have an adjustable TDC pointer and it doesn't have the removeable center section. But it is fairly inexpensive.

Re: Roller cam end play [Re: AndyF] #553600
12/14/09 08:11 PM
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Quote:

The billet cover that I posted pictures of fits with stock water pumps and stock dampers. The Indy cast cover doesn't. The Indy cover also doesn't have an adjustable TDC pointer and it doesn't have the removeable center section. But it is fairly inexpensive.


Your correct Andy.The Indy cover takes a longer hub or use a spacer.The Indy has a cast timing tab and we usually find absolute TDC at the #1 piston and mark the tab accurately.

Re: Roller cam end play [Re: B G Racing] #553601
12/14/09 08:16 PM
12/14/09 08:16 PM
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Davenport, IA
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I set the .002 clearance using a feeler gage. Of course I had to take the pump on and off a few times to get this set. Then I set a precision parallel across the water pump flanges and depth miced to get the dimension, took the set screw out, coated it with teflon paste and reinstalled it to the dimension. I work at a tool and die shop so I can borrow parallels and depth mics easily.

After some thought this can be set without the use of precision tools as follows:

Drill and tap hole in W/P housing in line with camshaft with the pump out. Bolt housing to engine. Install set screw with loctite or teflon paste from the front of the housing using a feeler gage between it and the front cover to set the gap (I used .002). Bolt water pump in and you are done.

Last edited by 70shaker; 12/15/09 02:19 PM.
Re: Roller cam end play [Re: 70shaker] #553602
12/14/09 08:49 PM
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The Hughes cover looks great but it's pretty many dollars. Indy is a definite NO do! Is there anything in the middle?

Re: Roller cam end play [Re: sg66mopar] #553603
12/14/09 09:03 PM
12/14/09 09:03 PM
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Mine's a little backyard-ish.

I welded to the back of the waterpump enough to actually touch the cover. I measured the thickness of the cover. With the waterpump on, but not the cover I measured the gap between the button and the waterpump, and shimmed the button accordingly, subtracting the thickness of the cover for the actual end-play.

5668104-Waterpump1.jpg (30 downloads)
Re: Roller cam end play [Re: sg66mopar] #553604
12/14/09 11:19 PM
12/14/09 11:19 PM
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Quote:

The Hughes cover looks great but it's pretty many dollars. Indy is a definite NO do! Is there anything in the middle?




Not really. Muscle Motors tooled up a cover but evidently their vendor couldn't make the parts. MagnumHP used to make a cover but I'm not sure if they are available any longer. 440Source has a fabbed cover.

Re: Roller cam end play [Re: AndyF] #553605
12/15/09 12:16 PM
12/15/09 12:16 PM
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Well, bummer deal dude, as my wife always says. Maybe the Hughes piece will be in my Christmas stocking if I can figure out a way to get my wife reading this forum.







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