Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#444417 06/28/20 06:47 PM
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Wilson Offline OP
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Can anyone point me to a picture of the center of the rocker arm assembly?
In spite of having two books and a parts manual, I'm not confident I remember how the oiler and spring thingy are held between the two shafts.
Thanks,
Wilson


Wilson
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Wilson, I hope these help. The engine is a 1934 Master.

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Engine out of car001.jpg Engine out of car026.jpg Engine out of car027.jpg

Bill Masters
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Wilson Offline OP
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Bill, that's terrific!
That's what I was thinking, but it seems a little flimsy.
It's also odd that that bushing thingy has a small (1/16") restriction, whereas the other side is wide open!
I don't understand that.
Thanks very much!
WL


Wilson
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Because of the angel of the engine, oil more easily flows to the rear shaft, and the restrictor is needed to ensure some oil flows forward.


Bill Masters
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Wilson Offline OP
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WOW, I sure had my blinders on for that one!
I wonder if they ever got plugged by gunk or trash?
It's a small hole, so I'll be sure the rockers are well oiled before starting!
Thanks,
Wilson


Wilson
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The explanation I got from my Grandfather was that when the car is running forward, the movement forward, was thought to make pressure of the oil greater on one side more than the other. Thus the smaller hole allowed for equalization of the oil pressure. I have never had one plug up on either of my two 1936 Chevy's .And, Yes, the small hole side produces a delayed oil flow when first starting up and idling. Over 100,000+ miles on both and still good.

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Chevrolets explaination in 1933 was to reduce oil flow at th back of the head to reduce oil leaaks at the valve cover.


Gene Schneider
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Wilson Offline OP
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Believe it or not, there is "some" truth behind that statement.
Not enough to make it "true", but some.
Was your grandfather an oceanographer, or meteorologist?
https://www.nationalgeographic.org/encyclopedia/coriolis-effect/
Note that the effect will be greatest when traveling due north or due south, but not a factor if driving due east or due west.
Wilson


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Just make sure the restrictor is to the rear half of the shaft.
Tony


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My Grandfather, Dad, and myself were all Engineers.

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Wilson Offline OP
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Great heritage.
Once an engineer, always an engineer!
WL


Wilson

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