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| Cam Button idea? https://slantsix.org/forum/viewtopic.php?t=58745 |
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| Author: | slantzilla [ Sun Nov 29, 2015 10:00 am ] |
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IIRC, the cam stop idea for Slants was originally to try and ward off the dreaded oil pump gear failure. My good motor has one. It's just a nut brazed to the outside of the timing cover and an adjuster screw from an old rocker arm. Grind the face of the cam bolt smooth and call it a day. 
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| Author: | Doctor Dodge [ Sun Nov 29, 2015 11:09 am ] |
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That is what I do... braze a nut to the front of the cover and use a rocker arm adjusting "ball screw" with a lock nut. I have a special "punch" that helps me find the place to drill the hole in the T. cover. DD   
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| Author: | Badvert65 [ Sun Nov 29, 2015 2:32 pm ] |
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Regarding oil pressure buildup in the rear cam pocket.  What would be the harm in drilling a pressure relief hole to prevent pressure buildup in the rear pocket? |
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| Author: | emsvitil [ Sun Nov 29, 2015 6:20 pm ] |
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The angle on the cam lobes to promote lifter rotation also tends to push the cam back into the block. Or is it The angle on the cam lobes to push the cam back into the block also rotates the lifters. |
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| Author: | Doctor Dodge [ Mon Nov 30, 2015 7:22 am ] |
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Quote: ...What would be the harm in drilling a pressure relief hole to prevent pressure buildup in the rear pocket?
The pressure relief hole should already be there... it is a large hole drilled thru the rear cam journal.DD |
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| Author: | Badvert65 [ Mon Nov 30, 2015 9:38 am ] |
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I will have to double check. I didn't see one in the pic. -Matt |
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| Author: | Greg Ondayko [ Tue Dec 01, 2015 11:32 am ] |
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In the rear of the cam journal on the cam itself - not on the engine block. These picture illustrate this. https://encrypted-tbn1.gstatic.com/imag ... lV9GBnY7jQ http://www.slantsix.org/forum/viewtopic.php?t=46756 Greg |
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| Author: | Killer6 [ Sun Mar 27, 2016 11:54 am ] |
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Quote: The angle on the cam lobes to promote lifter rotation also tends to push the cam back into the block. Or is it The angle on the cam lobes to push the cam back into the block also rotates the lifters. Yes. When efficient engineering reigned, the tapered lobe/convex-face tappet was designed to do both. Some better than others. My 1st cam was a crane 260/.440 unit, it had ridiculously wide lobes and solid/sided tappets, it killed my dist and oil pump gears. I like to drive very hard,and that means putting the frt. discs to the test w/decent tires.I was experiencing an idle drop, and that explained it. I replaced it w/a purpleshaft 276/.490 set,and riveted a plate to the t-cover,then machined a delrin puck to fit over the cam bolt. I cut a notch in the washer side, then welded a "key" on the washer,..... it's still in there after 10's of K mi.,and 8yrs. year 'round use. |
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