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Packard 12 rod beating inserts
#1
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R H
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Anyone know why Packard put the oil hole off center

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jpg  20211128_193928_HDR.jpg (5,936.38 KB)
4498_61a7e13c18878.jpg 4624X3468 px

Posted on: 12/1 15:55
Riki
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Re: Packard 12 rod beating inserts
#2
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64avanti
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Bet you meant bearing insert?

Posted on: 12/1 18:58
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Re: Packard 12 rod beating inserts
#3
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Ozstatman
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Don't the bearings cop a beating anyway?

Posted on: 12/1 19:10
Mal
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====

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"Out of chaos comes order" - Nietzsche.

1938 Eight Touring Sedan - SOLD

1941 One-Twenty Club Coupe - SOLD

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Re: Packard 12 rod beating inserts
#4
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BDeB
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The off centre hole is for the oil squirt orifice in the connecting rod

Posted on: 12/1 19:18
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Re: Packard 12 rod beating inserts
#5
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R H
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I had new rods made and they put it in the center.

Thew me off drilling holes in bearings.

Picture is new rod

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jpg  20211130_192930_HDR.jpg (5,818.29 KB)
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Posted on: 12/1 20:55
Riki
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Re: Packard 12 rod beating inserts
#6
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Owen_Dyneto
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Typically the center hole is to feed oil to the wrist pin and the off-center one sprays oil to the thrust-side cylinder wall prior to the piston downstroke. Of course when installed in the rod cap, they are non-functional.

Posted on: 12/2 9:12
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Re: Packard 12 rod beating inserts
#7
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Packardbarry
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1937 PACKARD Instructions state to face all 12 squirt holes to the starter side. Guessing they gave up on what they were gaining and just relied on the splash system which most engines were designed to.

Have seen these holes blocked off. Assume they were reaching for higher oil pressure.

Posted on: 12/2 13:16
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Re: Packard 12 rod beating inserts
#8
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Tim Cole
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As the crank rotates the squirt hole will line up with the connecting rod oil feed. For the eights the oil squirt is directed at the camshaft and the piston slot. This is critical for the earlier cars with stamped cam roller carriers.

On the V-12 then where the oil is directed is determined by where the crankshaft hole is located.

Blocking off the squirt hole is total bone head on motors with long connecting rods. I can image the conversation on that one: "We don't need no holes cuz I saw on the TV that small block bowties don't have no hole in them. Let's do what we seen on the TV."

Posted on: 12/2 19:12
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Re: Packard 12 rod beating inserts
#9
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R H
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Carrillos. Made the rods. Besides racing rods. They make old car rods as well.

So I know they know what's up.

They had the Packard rod as an example..

The new rods are a lot lighter.

Attach file:



jpg  20190207_194909.jpg (2,009.69 KB)
4498_61a9d3747e1b6.jpg 3264X1836 px

Posted on: 12/3 0:11
Riki
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Re: Packard 12 rod beating inserts
#10
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Packardbarry
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1935 up Motor's Manual
'PISTON & ROD ASSEMBLE'

Page 67
1936 Shop Manual (1407-08)

Page 53 - 1937 Twelve section
1937 Shop Manual

Page 120
https://packardinfo.com/xoops/html/dow ... /1937-1938_ShopManual.pdf

Page 4 in '12' specifications
https://packardinfo.com/xoops/html/downloads/1939_DataBook.pdf

WOOPS - Looks like they started specing it in 1935
1937 PACKARD Instructions state to face all 12 squirt holes to the starter side. Guessing they gave up on what they were gaining and just relied on the splash system which most engines were designed to.

Posted on: 12/3 11:30
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