Engine Identification - 1937

Queries about model and year identification, engine and vehicle numbers, etc.
Post Reply
Dwight Bedsole
Posts: 57
Joined: Mon Jan 20, 2020 4:01 pm

Engine Identification - 1937

Post by Dwight Bedsole » Tue Sep 29, 2020 8:45 am

I have a 1937 Packard Convertible Sedan SN 1097-1175, chassis ID 120C and am trying to identify the engine. The only markings I have found are:
Cylinder Head - HC Packard, PMC 7 - 26, 367635 stamped in front of head next to water inlet.
Right rear (passenger side) low on crankcase 11 - 6 - 45, 373894
Left rear low on crankcase next to starter - 11 - 7 - 45.

It has a 1937 Auto-lite generator GCJ-4801 A, but a 1942-47 Auto-lite IGT- 4203 12A8 distributor.

Thanks
Dwight

Howard56
Posts: 1301
Joined: Mon Dec 24, 2012 11:35 am

Re: Engine Identification - 1937

Post by Howard56 » Tue Sep 29, 2020 9:58 am

The large visible numbers are casting numbers and generally of not much use in identifying a particular engine.

Engine numbers are usually stamped on a pad typically at the L side of the block but in varying places depending on year and engine. Here is a chart showing some typical locations and number ranges for the various engines in the 35-39 years. The sixes are noted and the 37 eights should be in the same general area as the 39 shows but if nothing is found in that spot look very closely at the block in front or back or even above the distributor. The stampings can be very faint and hard to see. If they are also covered in grease and dirt it may take a good cleaning to find them.

You can visit www.packardinfo.com to find the complete engine number information pages.
Attachments
engine numbers.jpg

Dwight Bedsole
Posts: 57
Joined: Mon Jan 20, 2020 4:01 pm

Re: Engine Identification - 1937

Post by Dwight Bedsole » Tue Sep 29, 2020 10:59 am

Thanks Howard for the response. I did first go to the packardinfo.com site but as you know they do not show engine no. location for a 1937 eight. I will continue to look - fortunately the left side of the block is clean but unfortunately freshly painted.
What does "HC" denote?

Dave Czirr
Moderator
Posts: 5404
Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: Engine Identification - 1937

Post by Dave Czirr » Tue Sep 29, 2020 11:18 am

"HC" on the cylinder head identifies it as the high compression (ratio) head.

The dates in November 1945 are casting dates, factory oversight that they don't match.

Howard56
Posts: 1301
Joined: Mon Dec 24, 2012 11:35 am

Re: Engine Identification - 1937

Post by Howard56 » Tue Sep 29, 2020 11:47 am

For a 45 casting date the engine number should be in the same location as the later 245 and 282s similar to the 21st series.
Attachments
engine location.jpg
engine.jpg

Dwight Bedsole
Posts: 57
Joined: Mon Jan 20, 2020 4:01 pm

Re: Engine Identification - 1937

Post by Dwight Bedsole » Wed Sep 30, 2020 6:55 am

I stripped all the paint off of the boss between cylinders 3 and 4 and there is absolutely no evidence of any identifying engine number. At this point I conclude that the engine in my '37 is not a 1937 120 but a 1945 engine. Is there a way of determining whether it is a Delux Eight or a Custom Eight ? does the HC cylinder head indicate one or the other ?

Thanks
Dwight

Dave Czirr
Moderator
Posts: 5404
Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: Engine Identification - 1937

Post by Dave Czirr » Wed Sep 30, 2020 7:14 am

If the engine replacement was done by a Packard dealer using a factory replacement engine, those engines were commonly supplied without a motor number. No special significance to the high compression head.

Post Reply