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I'm new to the Packard Nation and having trouble with identifying engine application by the connecting rods that I have. The numbers are as follows:
1. 219686 - 9 1 A
2. 221639 - 4 D
3. 186646
Any help would be greatly appreciated.

The #s found on connecting rods are typically forging numbers and not part numbers; forging numbers are not listed in the parts books and I don't know of a cross-reference for them so I think identifying them will prove difficult. I've got some stray rods in the parts bin and will post again here if I find any matches.

If we assume for the moment that forging numbers, like casting numbers, are in close numeric proximity to their final parts numbers, your rods would seem to date to about 1936 and earlier. And don't forget for the senior eights, rods 1,3,5 &7 were different that 2,4,6 and 8 in most (all?) of those motors.

PS - are the rod caps finned or plain? Poured bearings or machined for shells? Center-to-center length? Main journal diameter? Center to center on the 320 engines is about 10-15/16, measured crudely.

This may be a case where a picture is worth a thousand words!

Hello - I sent an e-mail to your gmail account today. Please check your e-mail...
Thanks in advance.

Abel

G'day Abel,
Although a PackardInfo member for a while this is your first post, so

And I invite you to include your 36V12 in the Packard Owner's Registry here on PackardInfo!

Dear Babbitt

I hope these rods are loose stock and not part of an engine because these number indicate different series rods. If they are part of an engine then I assume that is why it requires service.

For motors with babbitt bearings individual rods could be purchased as replacements. Substitution of insert bearing rods was an authorized repair for 7th through 11th series cars, but they were sold in sets. Of course cheating would occur.

For cars with insert bearings, the numbers should thus match, but for cars with poured bearings they do not have to match. By matched set there are two number sets, one for odd cylinders and the other for even cylinders. On the twelve one number for left bank and one number for right bank. These numbers are different by one.

Things get even more foggy because Packard listed babbitt bearing rod assemblies for 12th series cars.

Now, if the car has babbitt bearings the casting numbers denote the original bearing size (std, .001, .002 etc), so they need only weigh the same and be congruent. When new the cars had matched sets as noted above.

If the car has insert bearings the numbers should be a matched set.

I assume in the case of bearing burnout the replacement would have the same number if purchased through Packard, but after WWII who knows what would have been going into those motors.

Hope this helps.

I've found some numbers that are close but no cherry yet. A 221630 fit a 35-37 Std. 8 and 38 8-1603-4-5. A 186650 fit a 32 Packard 903 and 904.
A 219686 fit a 35-36 Packard 12 Cylinder. That one is a solid match.

Gene