Sinceyouwasup engine swap question 1FZ-F

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ranchero7

ranchero7

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Location
Salida, CO
OK, so the troopy I bought has rod knock (1FZ-F). The troopy came with the 1FZ-F that @71harrison pulled from his troopy sitting in the back. Reportedly ran fine. I'm preparing to swap the motors over. Harrison's has no leaks other than PS pump. I'll definitely reseal that. I was planning on doing rear main and oil pan, but now I'm wondering if I should leave the pan alone since there are no leaks now.

I'm thinking if I like the Troopy I'll swap to an LS or LT, but....I keep hearing good things about the 1FZ-F and I might just like it. I never disliked the 1FZ-FE in my 80, but was planning on swapping for more power. If I like the 1FZ-F, I might wish I had resealed everything and perhaps checked crank and big end rod bearings.

I'm definitely doing all new coolant and vacuum lines. I bought a carb rebuild kit, but I'll hold off on that until I get the new motor running in the troopy.

What would you do if you had the 1FZ-F sitting on a stand?
 
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If you were seriously wanting an LS swap in your 80, why would you think, even for a minute you'll like a carbed version with less power and even worse consumption?

Don't ask me what I would do cause I don't want an LS swap and would be happy with an FZ.

My input for you would be to drop the good FZ in and just start planning the LS swap, then when your ready get in touch with me to buy your drivetrain.
 
Hello,

Off the top of my head:
  1. Replace the water pump.
  2. Replace valve cover seals.
  3. Check valve clearance.
  4. Replace coolant lines and hoses.
  5. Replace vacuum lines.
  6. Check the exhaust manifold for leaks. Replace the exhaust pipe and muffler if necessary.
  7. If your engine has a thermostatic valve, check it and make sure it is connected to the electrical system.
  8. Check and replace water temperature senders and their circuits.
  9. Check and replace the oil pressure sensor and its circuit.
  10. Clean the distributor. Replace the sparkplug cables.
  11. Replace the high-altitude compensator.
  12. Refurbish the carburetor with the carburetor rebuild kit and have it tuned. Hint: if your idle speed is 750-800 rpm, you are fine.
  13. Check the ground connections of the ignition coil and the carburetor.
  14. Have the radiator repaired or replaced.
Hope this helps.

If I remember correctly, the power of a 1FZ-F engine is around 180 HP. Not a ton by today's standards but enough to keep you going. Interestingly, it has a little more low-rpm power (at 1400 - 1600 rpm) than the 1FZ-FE at the same rpm range.

How thirsty it can become depends on your right foot.






Juan
 
You'll like the troopy if you want what is offers and don't need what a troopy lacks. It's top heavy, has long overhangs and the wheelbase is longer than the 80 so it won't wheel like one.

I would keep it all Toyota. You're already 3/4 of the way to a good Toyota engine at almost no cost to you compared to the LS, I'd stick with that. Take the thousands that an LS swap would cost you and take a nice long trip somewhere in the truck you have, with the power you have, and the time you have.
 
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Tennessee Jed said:
You'll like the troopy if you want what is offers and don't need what a troopy lacks. It's top heavy, has long overhangs and the wheelbase is longer than the 80 so it won't wheel like one.

I would keep it all Toyota. You're already 3/4 of the way to a good Toyota engine at almost no cost to you compared to the LS, I'd stick with that. Take the thousands that an LS swap would cost you and take a nice long trip somewhere in the truck you have, with the power you have, and the time you have.
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Hello,

x2.

You have a good set up. It is better to leave it as it is.





Juan
 
2x on swapping over the healthy 1FZ-F. get it a proper tune up, install some headers if more power is needed and move on. An inline 6 with it’s inherently balanced qualities is a fantastic powerplant.

I’m always bemused when folks buy a Toyota with an engine of legendary reliability and then consider putting in a V8 with all the headaches and questionable reliability that comes along with owning a frankentruck.
 
DrRock said:
2x on swapping over the healthy 1FZ-F. get it a proper tune up, install some headers if more power is needed and move on. An inline 6 with it’s inherently balanced qualities is a fantastic powerplant.

I’m always bemused when folks buy a Toyota with an engine of legendary reliability and then consider putting in a V8 with all the headaches and questionable reliability that comes along with owning a frankentruck.
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Absolutely disagree with this, even as purest as I am known to be.

Modern American V8’s have proven themselves to be reliable engine swap options. Plentiful spare parts supplies OEM or aftermarket that are readily available. Adaptors and all of the conversion parts readily available.

The “unreliable” part of the equation is how it’s installed and systems integrated. That’s where they end up getting a bad name. Mainly because it’s either garage hacks cobbling things together or shop that are clueless on doing a swap or do a swap with shǐtty parts/systems integration.

While I 100% always advocate for Toyota engines, I think people should always consider the best powerplant for their intended uses and goals.

If one’s truck is going to live in North America, V8 options are great.

If one’s truck is going to travel the globe, a Toyota engine option would be much better suited for ubiquity of parts and knowledge for fixing globally.
 
OGBeno said:
Absolutely disagree with this, even as purest as I am known to be.

Modern American V8’s have proven themselves to be reliable engine swap options. Plentiful spare parts supplies OEM or aftermarket that are readily available. Adaptors and all of the conversion parts readily available.

The “unreliable” part of the equation is how it’s installed and systems integrated. That’s where they end up getting a bad name. Mainly because it’s either garage hacks cobbling things together or shop that are clueless on doing a swap or do a swap with shǐtty parts/systems integration.

While I 100% always advocate for Toyota engines, I think people should always consider the best powerplant for their intended uses and goals.

If one’s truck is going to live in North America, V8 options are great.

If one’s truck is going to travel the globe, a Toyota engine option would be much better suited for ubiquity of parts and knowledge for fixing globally.
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Hello Beno, from my side, I wasn’t calling out American V8’s which is why I didn’t state them specifically in my post. The broader issue is that many see dropping in a larger powerplant as a way to solve one problem but then don’t take the rest of the vehicles systems into account now that more power is available. As systems engineers we must have awareness of what else more power will impact. The obvious ones are braking, driveline and suspension. These two subsystems will need to be sized and updated appropriately in order to ensure vehicle safety and performance across all systems can match the added power output.

This is a great conversation and my hope is that by spreading this type of knowledge and education across our community, folks will gain an appreciation of how these systems impact one another and make good choices based on their budget and uses for their vehicle.
 
All - thanks for your replies so far. I definitely will install the 1FZ-F I have sitting here. When I was thinking of an LS or LT swap, I was using my 80 differently - lots of road miles. Instead, I bought a 100. The 75 will be for slower travel, and zero commuting , the 1FZ will probably be fine. If I do end up doing an LT/LS swap, to @OGBeno 's point, I would do it right with factory connect and cruise engine/tranny and all new parts.

@JuanJ 's list made me realize that I have no high altitude compensator on mine. I think this could be an issue as I live at 7000 feet and will use the vehicle between 0 and 11,000 ft, but mostly 7-10k feet. One thing I did not mention is that the engine in the truck now has a Holley Sniper fuel injection. I don't really trust that it works, so I plan to go back to the carb. I think I have most of the carb-related stuff that Paul took off of it, but it will be a little chore to figure out all the vacuum lines, fuel lines, etc. It looks like the carb that Paul had (I have it in a box), is a little different from the one that came on my swap motor. So even more fun there.

Would you all reseal an upper and lower oil pan that is not currently leaking?
 
If the Troopy has a 5 speed stick there will be a vast improvement in power over the 80s slush box
 
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ranchero7 said:
All - thanks for your replies so far. I definitely will install the 1FZ-F I have sitting here. When I was thinking of an LS or LT swap, I was using my 80 differently - lots of road miles. Instead, I bought a 100. The 75 will be for slower travel, and zero commuting , the 1FZ will probably be fine. If I do end up doing an LT/LS swap, to @OGBeno 's point, I would do it right with factory connect and cruise engine/tranny and all new parts.

@JuanJ 's list made me realize that I have no high altitude compensator on mine. I think this could be an issue as I live at 7000 feet and will use the vehicle between 0 and 11,000 ft, but mostly 7-10k feet. One thing I did not mention is that the engine in the truck now has a Holley Sniper fuel injection. I don't really trust that it works, so I plan to go back to the carb. I think I have most of the carb-related stuff that Paul took off of it, but it will be a little chore to figure out all the vacuum lines, fuel lines, etc. It looks like the carb that Paul had (I have it in a box), is a little different from the one that came on my swap motor. So even more fun there.

Would you all reseal an upper and lower oil pan that is not currently leaking?
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Hello,

The high altitude compensator is attached to the carburetor.

I forgot your 75 Series is a Middle East spec truck. It does not have a thermostatic valve, nor a high altitude compensator. You can add the latter to the carburetor setup. The 1FZ-F has no problem operating at the altitude you mentioned, provided it is properly tuned.

Get an engine manual for more information on the vacuum lines setup.

Regarding the oil pan seals, it is worth replacing them. You will be in the neighborhood anyway.





Juan
 
I am a big LS guy but I do think it would be neat to retrofit the 80 series 1FZ-FE with OBD2 functionality, with a mild turbo setup. They do great in 80 series.
 
^^ this,
i vote force fed 1fz, however you conceive of achieving that
go through everything on the engine while its out, without it being a full rebuild
and it is possible to turbo a carbed engine, ive done it in the past, built everything, tuned it myself, drilled the jets out for fuel flow etc
 
Rear main for sure, I wouldn't reseal the oil pan unless i was going to reseal the timing cover also. the timing cover has two rubber o-rings that seal oil pressure that can leak, from what I've seen those are more likely to give you trouble then the oil pan form in place gasket.

i vote put the carb engine in for now and then swap to factory EFI with turbo/supercharger. Will help out with your altitude.
 
JuanJ said:
Hello,

The high altitude compensator is attached to the carburetor.

I forgot your 75 Series is a Middle East spec truck. It does not have a thermostatic valve, nor a high altitude compensator. You can add the latter to the carburetor setup. The 1FZ-F has no problem operating at the altitude you mentioned, provided it is properly tuned.

Get an engine manual for more information on the vacuum lines setup.

Regarding the oil pan seals, it is worth replacing them. You will be in the neighborhood anyway.





Juan
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Juan,

You happen to have a PN for the high altitude compensator?

Thanks!
 
TheBussman said:
Rear main for sure, I wouldn't reseal the oil pan unless i was going to reseal the timing cover also. the timing cover has two rubber o-rings that seal oil pressure that can leak, from what I've seen those are more likely to give you trouble then the oil pan form in place gasket.

i vote put the carb engine in for now and then swap to factory EFI with turbo/supercharger. Will help out with your altitude.
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Numerous posts on this by far more knowledgeable people, but I understand from turning your 1FZ-F into a 1FZ-FE is not at all as straightforward as just bolting on a few OEM EFI bits, so if that’s a motivating desire of yours, check out elsewhere on Mud and determine what will be required to inform your expectations.
 
To be sure a professional installation of an LS is a dead solid, reliable, high performance option that has no down side other than (to me) the eye watering cost. I can't do this kind of work myself so that figures into my math.

I love my humble 1HZ but if it ever goes I'm going to put in a 5VZ-FE which is all the engine that the workin' man needs. 🤠
 
As the previous owner of that motor, I wouldnt do to much to it and just run it as it only had 170k km but obvious bias!

I'll likely cruise out to your neck of the woods some time in the next year (buddy lives there) so when I'm around I'll ping ya if you want to give the LS a spin.

As one of the crew who has actually owned and driven both sides, the only space I'd say is a serious large improvement is in fast freeway flying, and even that is only an improvement because I swapped the trans at the same time so I have a much taller high end w/ the torque to move it. I took that motor out to CO and went over all the passes and whatnot, it wasnt fast but it never gave me any sort of issue. A troopy was never made to have 400+ hp/tq, and realistically none of us ever actually need that. I did my swap primarily because it seemed like a fun idea and it has been, but anyone who says its "practical" is lying to themselves.

Long term reliability I'd say is a wash, both are reliable, parts are a bit easier to get from the LS in the states, but its not hard to get parts for the toyota motor in my experience? You're just talking a chance of picking up same day vs needing to get it shipped almost always. Truthfully I dont think 95% of us abuse or use these things so much that other reliability concerns are top need 🤷‍♂️

IMO if you havent lived with a troopy yet, throw the motor back in and try it for a bit. After you've used it you'll know what you want to do. I got mine from someone who was in love with the IDEA of a troopy, and realized in practice they're kinda dumb. A lot of us just happen to like that kinda dumb
 
71harrison said:
IMO if you havent lived with a troopy yet, throw the motor back in and try it for a bit. After you've used it you'll know what you want to do. I got mine from someone who was in love with the IDEA of a troopy, and realized in practice they're kinda dumb. A lot of us just happen to like that kinda dumb
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so true,,,, Troopy's make no sense owning in America and Toyota knows that, but, dumb is what we enthusiasts do so well isnt it?
 
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