Newbie question: what exactly is a 1.5F engine?

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Pistorman

Pistorman

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I have a 1970 FJ40, built 6/70 but mechanic says mine is really a 7/70 because it uses a dual brake mc, etc.

I am trying to decide in rebuilding a good working F engine or to switch for a 2F, however I've read here there is actually a 1.5 F? If so what is it? when was it out, would I have it? and if so, is it still worth to swap for a 2F?
 
Im not positive, but i dont think the 1.5 is in a 70. I have a 74 with the 1.5. They started putting the 2F in 75's i believe, and the only difference between the 1.5F and the 2F is a little displacement. I think they only did the 1.5 for a couple of years. I have read good things about the 1.5F, alot of guys prefer them. Again im not positive, just trying to remember what i have read on here. Someone far more knowledgeable than me will chime in.
 
The 1.5F was only put in the 74 model, and it was a transition between the F and the 2F. It is the F displacement, with all of the oil flow and other improvements that arrived with the 2F in 1975.

Some here are of the opinion that it is the best landcruiser engine made. I have one in my 74 Pig and love it.

That being said, just due to the scarcity of parts, I would not seek out and put one in my 40. If the F is in fairly good shape, go with it. If it is old and tired and has already been bored and rebuilt multiple times, go with a 2F.
 
I have the original F in my 71. My previous '68 fj40 had the original F for 247k miles.....still ran great when I sold it in '79 and the only thing we did was change the oil every 3k miles (mobil 1), new water pump and 2 fuel pumps over 14 years. I think they made the F for 20 years or so...parts are cheap and plentiful...can't beat the old reliable tough as nails F.
 
The quick way to spot the 1.5F is that the oil filter is not remote mounted. It's mounted to the block like on the 2F.
 
I have a July 1971 FJ-40 that someone put a November 1974 F engine in. It is definitely a 1.5F. Thanks for all of the information.
 
I have a 1974, with what looks a lot like a 2F, except for the intake and carburetor. (not sure how different the intake is, but does not have the heat shield / insulator)
Aluminum valve cover (might not be original, does not have 2F stamped on it).
Original air cleaner was gone, don't know what it looked like, but there is no threaded hole for a stud to mount anything in the carburetor.
Alternator is on the driver's side, low, mounted near the bottom of the block.
Oil filter on the passenger side, near the distributor, mounted on the block.
IMG_20200811_221452.webp


I think a 2F would have a slightly larger displacement and like 20 more HP? A few other things are in different places, like the alternator. And the air filter. But either should fit fine under your hood.

I have a carburetor off a newer 2F that I am also considering swapping to, there's a few key differences that are pretty obvious (but really I'm likely to buy a holley EFI kit soon).

But everything else that I can compare between this and a 2F without taking the valve cover or oil pan off all look the same.
 
I have an original 9/74 build FJ40, with the original F engine. It's a great engine. Simple and easy to work on. I also love the simplicity of the carburetors from this era. Just for clarity to the PO, Toyota never called this engine a 1.5 F. That's a term that Landcruiser folks in the US have made up as a way of distinguishing between original oiling systems and the updated oiling system of this short era of F engine. Incidentally, mine is even more unusual as only 9/74-12/74 are the only F engines that have the updated 2F style diaphragm clutch as well.
 
kerplunk said:
I have a 1974, with what looks a lot like a 2F, except for the intake and carburetor. (not sure how different the intake is, but does not have the heat shield / insulator)
Aluminum valve cover (might not be original, does not have 2F stamped on it).
Original air cleaner was gone, don't know what it looked like, but there is no threaded hole for a stud to mount anything in the carburetor.
Alternator is on the driver's side, low, mounted near the bottom of the block.
Oil filter on the passenger side, near the distributor, mounted on the block.
View attachment 2445968

I think a 2F would have a slightly larger displacement and like 20 more HP? A few other things are in different places, like the alternator. And the air filter. But either should fit fine under your hood.

I have a carburetor off a newer 2F that I am also considering swapping to, there's a few key differences that are pretty obvious (but really I'm likely to buy a holley EFI kit soon).

But everything else that I can compare between this and a 2F without taking the valve cover or oil pan off all look the same.
Click to expand...
September 1973 F engine. Maybe POs modified the F.
 
kerplunk said:
VIN TAG ( in the door) is 10/73.
pretty close, might be original?
Click to expand...
Your engine was made just before the rest of the vehicle. I think my original engine for my July 1971 body was made in June 1971 but I’d need to look at the tag in the engine bay on the inside of the passenger Side front fender.
 
With the oil filter on the passenger side and the engine block number starting with F, you have the Late F, or 1.5 F if you prefer.
The block number on a 2F would start with 2F.
 
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