1uz swap

[Hachibill]

started this project awhile ago. figured id make up a thread about my progress. the donor is a 97 v6 automatic 4runner sr5. pretty clean. got it off a kid who took it mudding and threw a rod out the side of the 5vz. so me and my buddy went in on this project, i bought the 4runner, he supplied the 1uz and associated. we tried to keep it as simple as possible. no mods to the chassis or suspension. and everything is going to work. p/s, a/c, cel, all the gauges.. ect ect. we started with a jdm ls400 1u, which means we had to switch to a sc400 rear sump pan and oil filter housing to clear the front x member. one of our goals was to utilized the 5vz a340e transmission. i work in a machine shop and made adapters to bolt the 5vz tq converter to the 1uz flex plate. that and a stock 1uz bellhousing took care of that.

once we got the motor sitting in the with tranny bolted up to the stock mount and crossmember we noticed the motor was to far forward. so we modified the tranny x member, reused the stock mount and moved the whole thing back a coupe inches. no it sits perfect. we used the stock 5vz motor mount on the 1u mount bracket. the only real fab we are going to run into is the exhaust manifolds/ exhaust and a/c line (the 1u compressor is on the oposite side of the motor to the 5vz). the power steering lines bolted up, the throttle cable and heater hose's bolted up. the only big obstacles left are sorting out the wiring, exhust manifolds that fit, and getting a 4cyl radiator to make the radiator hose's a little bit closer to lining up. ill get more pics but here's a couple so far..

 

[BrianSD_42]

I'm ignorant on the details of the 1uZ engine.

What is it from and what are its specs?

 

[TheeMikeB]

Isn't that the V8 that would be in the Lexus SC400 but that would be badged as a Lexus, this one has a Toyota badge. Is this from Japan?

 

[NachoPitt]

Every other 1uz swap I have seen required a body lift. Any lift on this one? I am really digging the use of all the stock parts.

 

[Whitson Metalworks]

I love this project!! For some reason I like the idea of the 1uz for a swap over the 4.7 because i , like you, want to use the stock tranny and bypass any transfer case and drive line problems. The huge roadblock I would have is the wiring, I would want everything to function as if it were stock as well, but have mediocre wiring skillzz. Keep updates coming and make another adapter for the torque converter!

 

[Skidmarcx]

Looks like it fits like a glove! Nice project!

 

[Atrox Caeda]

That looks awesome! Anytime I get to the wiring on a project I hate it. If you have time then it's ok, but sometimes it's worth it just to ask Painless Performance to get it done.

 

[hearno]

Isn't that the V8 that would be in the Lexus SC400 but that would be badged as a Lexus, this one has a Toyota badge. Is this from Japan?

If you read the original post, you can see where he said they used a jdm motor.

 

[TheeMikeB]

Guess it helps to read the fine print.

 

[Whitson Metalworks]

I want to do this bad. Mines got 260k on it, would be a sweet upgrade...

 

[Bad Obsession]

Love this project, man. Thanks for posting!

 

[cdrewferd]

Following for sure. This is the swap I've wanted to do for a couple years. Gonna wait till my 3.4 dies though.

 

[Willhickey]

weve got a 90 ls and a 94 sc the 1uz is an amazing motor and can be had for pennies on the dollar... if this works out and you can help me with the wiring i would love to do this to my runner as long as i can get it obd2 compliant as well good luck

 

[Ed_C]

I love this project!! For some reason I like the idea of the 1uz for a swap over the 4.7 because i , like you, want to use the stock tranny and bypass any transfer case and drive line problems. The huge roadblock I would have is the wiring, I would want everything to function as if it were stock as well, but have mediocre wiring skillzz. Keep updates coming and make another adapter for the torque converter!

The 4.7 is a UZ series engine,except it's cast iron and has 4-bolt mains as opposed to aluminum with 6-bolt mains in the 1UZ and 3UZ (4.3 liter VVTi). Flexplates/flywheels are interchangeable among all three engines and so are bellhousings. I had a bellhousing off a Lexus LS430 transmission and it mated right up with a 2UZ (4.7 engine). Dave at Lextreme.com has swapped the existing 1UZ shortblock with a built 2UZ in his SC400 while keeping the rest of the components (engine top end,transmission,etc)

 

[Whitson Metalworks]

Saweet! Now I need to find a 4.7 at a yard sale lol

 

[Hachibill]

Every other 1uz swap I have seen required a body lift. Any lift on this one? I am really digging the use of all the stock parts.

One of our goals was for no body/ suspension mods. And with the sc400 oil pan it fits perfect. 4x4 would prolly need a 4x4 tundra pan to make it work. But ours is 2wd. No no lift required. And everything stock will work including all the gauges.

 

[cdrewferd]

We need more pics man.

 

[NOT ME OR SOMEBODY]

I'm Jealous

The 1uZ engine is sweet.

I have a 1996 ls 400 with 110,000 miles on it that I use as my go back and forth to work car with the 1uz. It will get on down the road and never seems like it is working hard at it.

I often wish the 4runner had that kind of power. I wish I had the time and the place to do this kind of swap.

 

[ryhi]

nice! i miss my 1uz.

 

[TegoXR]

The 4.0 L (3,968 cc or 242.1 cu in) all-alloy 1UZ-FE debuted in 1989 in the first generation Lexus LS 400/Toyota Celsior and the engine was progressively released across a number of other models in the Toyota/Lexus range. The engine is oversquare by design, with a bore size of 87.5 mm (3.44 in) and stroke of 82.5 mm (3.25 in).[1] It has proved to be a strong, reliable and smooth powerplant with features such as 6-bolt main bearings and belt-driven quad-camshafts. The water pump is also driven by the cam belt. The connecting rods and crankshaft are constructed of steel. The pistons are hypereutectic.

Its resemblance to a race engine platform (6 bolt cross mains and over square configuration) was confirmed in 2007 by David Currier (in an interview with v-eight.com), vice president of TRD USA, stating that the 1UZ platform was based on CART/IRL engine design. It was planned to be used on GT500 vehicles, however its subsequent use in the Daytona Prototype use was not planned.

In its standard, original trim with 10:1 compression, power output is 191 kW (256 hp), torque of 353 N·m (260 lb·ft).[1]
1UZ-FE

The engine was slightly revised in 1995 with lighter connecting rods and pistons and an increased compression ratio to 10.4:1 resulting in peak power of 195 kW (261 hp) and torque of 363 N·m (268 lb·ft).

In 1997, Toyota's VVT-i variable valve timing technology was introduced along with a further compression ratio increase to 10.5:1,[1] bumping power and torque to 216 kW (290 hp) and 407 N·m (300 lb·ft). In the GS400 application, output was rated at 300 hp and 310 lb·ft of torque.

The 1UZ-FE was voted to the Ward's 10 Best Engines list for 1998 through 2000.[2][3][4]