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how do I tell what motor my 1974 fj 40 has?
Dumb question...1F v 2f
- Thread starter Rat Rod Rusty
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If you look at the engine number on the block it will start with either F or 2F and that will tell you which one it is.
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1. F [or 1F]
2. F [or F.5]
3. 2F
2. F [or F.5]
3. 2F
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What is the difference in a nutshell in these?
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It's not really that simple.
Your first picture is a F engine but not all F engine were the same this one if in a FJ40 is a F135. The FJ25 had both the F135 and earlier a F120.
Your second picture is a F engine but not a F155 from a 74. It is a F145 or F155 pre 72 model. Not really clear when the change was from F145 to F155. May have something to do with the carburetor. The 74 F155 would have a new oiling system that carried over to the 2F. The one you pictured has a oil fill tube on the right side. That went away with the 71 model. The easiest way to know if it a 74 model F engine the serial number will start with F not 2F and have a spin on oil filter in front of the distributor. 74 was also the last year of the steel valve cover but those could be changed with a 2F aluminum one. Starting with the 75 model the FJ4X had a 2F. Unlike the F which had sub numbers these were all just 2Fs even thought there were changes over the years. Believe the one you posted a picture of is from the eighties.
Progression of the F engine... and some pictures 
These are the ones I know... They based the number of the F engine on HP
the first pic is of the B engine 85 HP before that it was 82HP
F105
F110 pic#2
F120
F125 pic#3
F130 pic#4
F135 pic#5
F145
F155
74 model F155 the 'F and a Half' engine
2F
These are the ones I know... They based the number of the F engine on HP
the first pic is of the B engine 85 HP before that it was 82HP
F105
F110 pic#2
F120
F125 pic#3
F130 pic#4
F135 pic#5
F145
F155
74 model F155 the 'F and a Half' engine
2F
Last edited:
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Nice one lads! Turns out I learnt my engine type stopped in '71, making it an F145/155. Which makes sense as it's a '69. I'm gonna tell people it's an F145 cause it's a helluva lot cooler. 
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You guys rock...thanks ...mines a 1973 fj 40 1f just fyi...I've shown some folks my FJ and they always seem surprised it's 1 f? What's up with that?
Whats the engine number mate
F and a half, now that's funny. It sure feels like an f and half sometimes.
Progression of the F engine... and some pictures
These are the ones I know... They based the number of the F engine on HP
the first pic is of the B engine 85 HP before that it was 82HP
F105
F110 pic#2
F120
F125 pic#3
F130 pic#4
F135 pic#5
F145
F155
74 model F155 the 'F and a Half' engine
2F
View attachment 953785 View attachment 953786 View attachment 953787 View attachment 953789 View attachment 953790
Didn't realize Toyota had "F125" and "F130" in their line up. Although decal looks like "F139" in picture #4?
Can anybody identify this engine. It is a 1973 Costa Rican fj40 but it has four speed transmission
Real simple, F head doesn't have bolt holes at each end like 2F and later engines have. In other words, you can't bolt a header onto an F engine.
Looks like my engine...been researching till I’m blind. What engine is this.?? I still can’t tell if I have an F or 1.5F...
If you have a remote oil filter you are pre 9/73. If you have an oil filler tube you are pre 9/71. Since your pic shows a valve cover with no cap, it’s safe to assume you are pre 9/71.