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
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| Erson 280/270 cam oiling hole question. https://slantsix.org/forum/viewtopic.php?t=38796 |
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| Author: | HyperValiant [ Wed Jan 27, 2010 7:02 pm ] |
| Post subject: | Erson 280/270 cam oiling hole question. |
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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| Author: | DusterIdiot [ Wed Jan 27, 2010 9:06 pm ] |
| Post subject: | My 2 cents... |
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 |
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| Author: | Charrlie_S [ Wed Jan 27, 2010 9:17 pm ] |
| Post subject: | Re: My 2 cents... |
Quote: . 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...)
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.
But that's just me... -D.Idiot |
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| Author: | sandy in BC [ Thu Jan 28, 2010 5:41 am ] |
| Post subject: | |
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. [/quote] |
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| Author: | Doc [ Thu Jan 28, 2010 8:53 am ] |
| Post subject: | |
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
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| Author: | HyperValiant [ Thu Jan 28, 2010 6:32 pm ] |
| Post subject: | |
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 |
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