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By Fred Scheuing - 10 Years Ago
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Can any one out there tell me what the cam grove depth is for a 312 Y-block, I have been told that aftermarket cams dont cut the grove deep enough, And I have a new build on a 312 with good lower end oil pressure, super clean and no oil going to the heads, Yes I have checked all the normal, rocker holes and head gaskets, It did get oil to the rockers when it was first fired up, now no oil to heads now, bearing did not spin, So all the normal stuff is good, So I,am thinking that the grove in my cam is not deep enough, does any one know the proper depth for the cam grove.
Thanks Fred
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By NoShortcuts - 10 Years Ago
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I've seen .035 as the recommended depth in several articles, Fred.
Hope this helps. 
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By 2721955meteor - 10 Years Ago
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did you remove the tubes from the ends of the rocker shafts. on my 57 292 i blocked the tubes off and taped the end stand made a bolt re the site. since then i get good oil to rockers with standerd groove in cam. i use 10/30 oil and it takes a good min to have proper oil coming from holes in rockers. do you have new rocker shafts,and rocker holes cleaned?
on a recent block i was not hapey with cam bearing hole lineup so bought a long drill bit and made sure the holes where properly aligned.this is a little trickey,i put a piece of wood (round) so when drill broke threw no scars on the cam bearing.some of the guyes ar using a came bearing with the grove on the out side,sounds like a good plan,tho i have not got the source yet. good luck cliff
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By NoShortcuts - 10 Years Ago
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This is a follow-up to what Cliff was suggesting regarding the availability of a y-block camshaft center bearing that has an outside diameter oil feed provision. This is IF you find that you have to fix an oil hole alignment problem, Fred.
Vern Schumann, a reputable source of y-block parts, is marketing cam bearing sets for the Ford y-blocks that have a center bearing that provides 360 degree O.D. oil flow. This was a design that Vern originated in 1959 and was a U.S. government military issued part. Vern's design cures mis-alignment of machine shop installations, cures spun bearings from dry start-ups, and cures index oil hole mis-alignment problems from bearing installation. It also cures cam journal oil groove depth issues, assures quick normal machine shop installation, and requires no special machining.
Vern's offering is a Dura-Bond cam bearing set No. F-9A with the center cam bearing Schumann modified with the 360 degree O.D. machined groove. Current cost is $52.50/set plus shipping.
Contact information is
Schumann's Sales & Service, Inc.
P.O. Box 128
Blue Grass, Iowa 52726
phone 563-381-2416
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By PF Arcand - 10 Years Ago
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Fred:Can you be specific? You had some oil to the top end on start up. Was that on both sides? Then it just stopped..What time frame are we talking about?
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By Y block Billy - 10 Years Ago
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Hi Fred, welcome to the site! I am with Paul, this shouldnt happen on a new rebuild, were all the passages cleaned properly?
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By Ted - 10 Years Ago
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In recent times, there have been an inordinate number of fresh built Y’s that have as few as 200-300 miles on them that experience the oil supply to the top end simply quitting. As a general rule, the oil to the right hand bank (U.S. passenger side) shuts off first and then if run long enough, the other side then quits also. In tearing those engines down, it’s simply a combination of ‘soft’ cam bearings and not enough depth on the oil groove in the center cam journal being the problem. I’ll add that modern valve spring pressures simply exasperates the problem.
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By PF Arcand - 10 Years Ago
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Ted: The soft bearings, are they made "overseas"?. What brands are satisfactory?
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By Ted - 10 Years Ago
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PF Arcand (3/1/2015)
Ted: The soft bearings, are they made "overseas"?. What brands are satisfactory?
I haven’t dealt with any cam bearings made on the other side of the world so I can’t say how those compare. The Sealed Power cam bearings for the Y appear to be the softest of those that are currently available and those are the ones I see giving the majority of oiling problems for the current crop of fresh built Y engines. While Durabond offers a much harder cam bearing for performance applications, that particular bearing is not available for the Ford Y engines. The Durabond offering for the Y is still harder than the Sealed Power bearing though so that’s the one to use if some new old stock bearings are unavailable. Here’s a picture of a Y block with brass cam bearings installed which at this time is the ultimate fix.
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