Hi guys,
I swapped out my carburated 1FZ on my 1994 80 series with a 1HZ out os a 70 series TLC. It was more trouble than i thought.
First of all the engine mounts off the 1hz didn't fit cause they were from a 70 series chassis. If i had a 1hz or a 1hdt from an 80 series it should bolt right in. but i didn't so i had to modify the driver side mount ,Shorter< so it would line up with the fan cover and stuff like that.
Second of all the bell housing changes between 1hz and the 1fz motors. Luckily i had a 5 speed that fit the 1hz, so i simply swapped bellhousings.
I had to use an different clutch disk cause of the size difference. Izuzu i think, not sure cause i bought it using a sample.
But i eventually got a 1hdt flywheel and clutch .
I had to lengthen the wires to the alternator cause its on the other side of the engine now. Also the leads for the water temp and oil pressure units.
The tach was something else. Since the tlc the engine came from didn't have a tack, thus the inyection pump didn't have the sender. so i had no tack signal.
With no tach signal, th A/C doesn't work. Funny those toyota engineers. real funny
So i took the magnetic pickup out of the 1fz distribuitor and mounted it over the a/c idler pulley. Epoxied a strong magnet to the pulley, and voila, tach signal. By the way you have to retain the gassers ignition module and coil for this to work. or at least thats how i did it.
I even have a sparkplug connected to the coil and isolated using rubber tape. just so stuff don't burn out .
The A/C compresor pulley has a different offset between the gas and diesel engines. Since i didn't have the diesel a/c compresor pulley, i had to modifythe compresor mount. Which also means that i needed new hoses and all that other stuff. Did i mention that the a/c won't work without tach signal???
The exhaust ,all you need is connect the down pipe to the first exhaust junction under the passenger side door. piece of cake.
I took about 5 days to finish the swap. The first 2 days were 20 hour work days, and about $800 in nickel and dime s**t like hoses , Freon, clutches, exhaust ect... not including the cost of the engine.
I must admit it turned out really well. though the 1hz engine is quite underpowered compared to the 1fz engine. I would prefer a 1hdt swap to get equivalent performance out of the swap.
Which is why I installed a 1hdt turbo on the 1hz engine.
I also used the propane kit i had when i ran the 1fz motor and fumigate the engine constantly with very small amounts of propane.
It smells kind a funky at idle, but really wakes up the engine.
I would sum up the swap in 5 words, Royal Pain In The A**
But would i doit again? Yes for sure.
hope this helps
Cheers
