I have a Erson cam from their most recent production run and just got my cam bearings today so I decided to check the oiling hole and found that the bearing will end up covering about half of each hole.Am I correct in thinking that this will not be sufficient for oiling the valve train? I can see light through the hole with the bearing slipped on the cam but like I said each side of the hole is about half covered.
My question is which way is the best for fixing this problem:

1.Have the journal grooved to provide constant oiling.

2.wallow the hole to match the bearing.I believe Doc has used this method.

If the first method is chose,how wide and deep should the groove be?
Thank you for all suggestions and help.

HyperValiant

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1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress

I wallowed the hole on mine not because the hole might be off, but to give it some more "window" while rotating by at high RPM... I think if I had to do it over again I'd have to match the "grooved" cam bearing that comes in the "set" (or buy two sets and use one in the rear journal, and drill the hole to match...)

But that's just me...

-D.Idiot

That will not work. The grooved cam bearing that comes in the set, is for the front journal. Each cam journal has a different diameter, and the bearings must be used in the correct location, or the cam will not fit. Using the front bearing in the rear location, will result in excessive bearing clearance. I just take a die grinder, with a cutoff wheel, and grind a groove around the rear cam journal. It does not have to be pretty. I make it about half the width, and depth of the groove in the front bearing.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

2.wallow the hole to match the bearing.I believe Doc has used this method.

That is what I did on my similar setup. Plenty of oil up top. Easy to do.
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Yeah....Im the one who destroyed this rare, vintage automobile.....

The method I use is to center punch, then drill a new, shallow hole in the correct location, then connect the 2 holes.
As stated, fast & easy to do with common tools.
DD

Thanks alot fellas,
I thought that there was a diameter difference in the bearings but not sure. I am going to use the "wallow"(or if you live where I do,its pronounced ,"wawler") method.
Also,what is the reasoning for a full grooved front bearing?I surmise that it is because of the load of the timing chain but Im only guessing.

Thanks
HyperValiant

_________________
1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress