Location for oil holes on rocker arms?

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Make sure you have detail cleaned each and every rocker. Punch the junk out of the holes with wire and run a tap or notched cleaning bolt through the threads and then clean the hell out of them. Mine had clogged holes and other debris.
 
As you can see, the hole on the underside is offset to the side.
So it likely does not intersect the space between the bushings.
If that’s how it is, and the oil has to squeeze between the bushing and the shaft to get into the hole, then they’re employing that clearance as a way to meter the oil out to the valve.
To me, if that’s how it actually is....... I like it.
With the engine running and warmed up you would get oil coming out of the hole...... but very little while priming the engine.

That’s a similar situation as to how solid roller lifters meter the oil to the top for pushrod oiling.
 
The gap between the two bushing halves is pretty large. I'd bet the hole on the OP's rocker is in that void.

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harland sharpe rockers...I can only see one oil hole ....oiling the pushrod

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mopowers said:
The gap between the two bushing halves is pretty large. I'd bet the hole on the OP's rocker is in that void.

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I wish I had taken another picture before I put everything back together, but I don't remember the big gap being there. As PRH suggested, the hole is outside of the what groove there is.
 
DrEamer said:
I wish I had taken another picture before I put everything back together, but I don't remember the big gap being there. As PRH suggested, the hole is outside of the what groove there is.
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So you have two bushings but the hole breaks through the bushing?? Trying to make sure before I call PRW tomorrow and kick some ear.
 
yellow rose said:
So you have two bushings but the hole breaks through the bushing?? Trying to make sure before I call PRW tomorrow and kick some ear.
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Don't take my word as gospel, like I said, I should have taken a picture while I had everything apart. It SEEMS like the groove was much smaller then the then the one shown, and the hole was not in the groove. I was not really looking at that part as much as making sure I could get liquid flow through the hole though.
 
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PRH said:
Think about how many thousands of sets of those have been put into service in the last 30-40 years.

No hole to the valve spring side....... yet you don’t hear of any failures as a result.

The BB ones don’t have the hole either.
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Yeah, for most street/strip stuff you don’t need any hole. I think I mentioned that in one of my posts, but maybe I thought it in my head but didn’t type it out.

If they are going to put an oil hole in the rocker IMO it needs to blow oil Dora fly on the valve spring to help cool them. The rest will take care of itself.
 
You did mention it, and there were comments about how there “needed” to be a hole on the spring side.
I knew there were no holes on the HS rockers, which I why I asked the question.
To let people connect the dots........ that maybe a bunch of oil going to the valve side may not be necessary after all.

There is no direct oiling to the bearings or roller tip on most Jesel rockers either.
 
PRH said:
You did mention it, and there were comments about how there “needed” to be a hole on the spring side.
I knew there were no holes on the HS rockers, which I why I asked the question.
To let people connect the dots........ that maybe a bunch of oil going to the valve side may not be necessary after all.

There is no direct oiling to the bearings or roller tip on most Jesel rockers either.
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It may not be needed. I know the oil hole is an option on T&D stuff.

I know that changing oil made my spring life triple or better on my drag stuff. Especially when you have two or three springs running on each other the heat from that alone is a killer. That’s one time when I want pressurized oil on the springs. Will it cost some power. I bet it would. But for what I was doing the extra spring life was a good trade off for some windage loss, which I tried to mitigate with a crank scraper and full length kick out pan.
 
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