The 3 changes in the FORD 'A' engine "28-31

Discussion forum for AA related activities, weekend outings, AA stories etc.
Post Reply
Posts: 752
Joined: March 9th, 2009, 8:06 pm
Body Type: 75-A
Model Year: 1930
Location: Sacramento, Ca.

The 3 changes in the FORD 'A' engine "28-31

Post by SHELBY MESSER » August 6th, 2016, 9:18 pm

DSCN0925.JPG (136.95 KiB) Viewed 9741 times
I use to know what the 3 changes that were made in the model 'A' engine. The only one I think I remember is a change in the rear main bearing oil flow. That may not be it. I don't want to stir any one wrong. But to the best of my knowledge there were 3 major changes. Anyone have any info on this. If you plan to build an engine this my be helpful to know. I have an early '31 engine I'm planning to build and put in my late '31. Talk about these new ' A' engines, They haven't proven themselfs yet. This engine has proven it's 85 yrs.and still running (well I pulled it from the original car(e'31 coupe) that I posted picture earlier. I'll have to do a major-major rebuild. It would run but not that great. I sold him a factory I had for $500. The I had with this fac. rb. was some times it would start right up. Other times I would run down the battery, and hand crank maybe 1/2 hr. before it would crank( the last time was in front of a local FORD dealer show room.) I had a good '30 engine engine that would in the first or second turn every time. Using the same carb. and distr. Something to read and enjoy :) Shelby, Sacramento.

Posts: 228
Joined: February 26th, 2007, 6:20 am
Model Year: 1930

Re: The 3 changes in the FORD 'A' engine "28-31

Post by Hayslip » August 10th, 2016, 10:34 am

The early engine had 5 camshaft bearings later reduced to 3.

User avatar
Posts: 361
Joined: October 21st, 2003, 1:38 pm
Body Type: None
Model Year: 1930
Location: Norwich, NY 13815

Re: The 3 changes in the FORD 'A' engine "28-31

Post by Brady » August 13th, 2016, 7:26 pm

Later blocks were drilled with oil access hole to the rear camshaft bearing

Posts: 478
Joined: June 3rd, 2013, 6:15 pm
Body Type: 186-B stake
Model Year: 1931
Location: SoCal

Re: The 3 changes in the FORD 'A' engine "28-31

Post by ModelAkid » August 16th, 2016, 9:50 pm

Later blocks had more stiffeners or braces cast in the block above the rear main.
Another difference is another hole for water circulation was added in the middle, with the head changed to match.
Also - this is not blocks - but there are 4 or 5 different types of oil pans.

Posts: 1206
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: The 3 changes in the FORD 'A' engine "28-31

Post by Stakebed » September 26th, 2016, 7:36 am

didnt the rear main cap drain pipe change diameters too?

Post Reply