How do I recognize when an engine was made other than serial number?

[Rusto]

Other than the engine number manufacturer date on the engine block and trying to match that up with what's on the SOR website, is there any way to tell if an engine came from the same year of the production date of the truck?

Are there differences from year to year that you can tell just by looking?

Does it matter when ordering parts and such?

Seems odd to me that we all have to go in the 40 community is a partial list from SOR.

Thanks.

 

[ToyotaMatt]

@65swb45

 

[bikersmurf]

Depends... what is the production date of the truck?
F have a remote oil filter on the intake manifold
F in 1974 have a filter on the block beside the distributor
2F 1975+ are more similar... other than differences in bolt on parts

 

[brian]

Are there differences from year to year that you can tell just by looking?


Thanks.

Yes but nearly everything on the outside of engine that might aid in determining what time frame it came from, can be un bolted.

 

[65swb45]

@65swb45

This is not going to be comprehensive, but here goes (off the top of my head). Note: cylinder head casting numbers are useful too. But a lot of those get swapped. I’m dealing with a swap right now, where I am supplying a customer a head that matches what came with the block, rather than what he has . Manifolds and crank pulleys get swapped even more often than heads, so I won’t go there. Besides, I already did a manifold FAQ.

The earliest F135s had a thicker steel plate behind the timing cover, a road draft tube on the oil filler and open vents in the valve cover.
@Cruiser_Nerd , @Splangy or maybe @Living in the Past can say when the thick plate ended. I’m going to guess it was 1961
1964-I would peg the ending of the road draft tube and the slitted valve cover with the introduction of the PCV system late in the year
1967 marked the introduction of the F145. No more Siamese port cylinder head. Passenger front of cylinder head had two threaded holes for the engine hook
1968 cylinder heads would have been tapped for air infection rail.
Mid 1969 would have marked the change from press on harmonic balancer to one that required the locknut
1971 should mark the start of three holes on the passenger front of the head
9/1971 should also mark moving the PCV from the oil filler to the lifter side cover
1972 should mark the elimination of the oil filler tube; filler cap on valve cover. Introduction of the F155
1973 is the return of air injection ports on the head
1974 marks the integration of the oil filter into the block, the F.5
1975-78 for the most part look the same. I basically look at 2Fs to see if they have the boss and threaded holes for the power steering pump mount.
1979 on- power steering boss
1986- threaded oil galley plugs

 

[Rusto]

Great information. Thanks.

 

[ToyotaMatt]

@65swb45

 

[Splangy]

I believe it was just the f105 and f120’s that had the thick motor mount plate behind the timing cover and that the f135 was the first engine with the “normal” motor mounts. F135 was introduced in late 1959 or early 1960 FJ25 models.

 

[65swb45]

View attachment 1790738 View attachment 1790739 View attachment 1790740

@65swb45

Is this a guessing game?

The large color pic shows an 81 and newer NON US spec’d 2F. Shorter valve cover, 4 bolt thermostat housing, non EGR intake, late model engine hook. Interesting that it uses the 75-80 valve cover nuts.

The smaller color photo is definitely a 1968 US spec’d F145. This is what @gurskey is working towards. Can’t tell it from the pic, but the nut on the air pump is copper plated, like the banjo fittings on the wheel cylinders. Obscuratum.