What is my 1UZ out of originally?

[-Nemesis-]

This is one question I've never known the answer too, the problem is the engine characteristics contradict some of the 'usuals' of what's on a Crown or SC engine (the two main donors.)

First up, the original leads had 1992 on them, which gives away the engine age.

Now, using Rod's article as a reference (and the common knowledge from here) i'll show you the anomalies.

http://lextreme.com/1uzfe_variants.html

Engine badges/signage:
Crown - plenum has a “4 CAM 32” badge on the plenum and the plug covers say "Toyota".
SC400 - has the Toyota logo on the plenum and “V8 FOUR CAM 32” on the plug covers
LS400 - has an "L" badge on the plenum and "V8 FOUR CAM 32” on the plug covers.
Celsior - has the Toyota logo on the plenum and “V8 FOUR CAM 32” on the plug covers.

My engine has V8 FOUR CAM 32 on it and Toyota badge

= SC400 or Celsior

Engine mounts:
Crown (pre-96) - Traditional steel mounts with a rubber isolating block with 4 fasteners.
Crown (post-96) - cast Alloy "ears" that stick straight out with a rubber isolator with one stud each end.
SC400 - cast Alloy "ears" that stick straight out with a rubber isolator with one stud each end. Same as Crown (post-96)
LS400 - cast alloy "ears" that sweep forward and out with a rubber isolator with one stud each end.
Celsior – as per LS400

My engine mounts are alloy and sit square to the engine (if anything the ear looks like it 'sweeps' back)

= Crown or SC

Sump:
Early Crown - UZS131 has mid bowl without an oil level gauge. Dipstick runs down thru head to sump.
Crown Royal Majesta - UZS 141 & UZS151 has front sum like an LS400
SC400 -Rear bowl sump with oil level gauge. Dipstick in an external tube.
LS400 - Front bowl sump with oil level gauge and dipstick in an external tube.
Celsior - Front bowl sump with oil level gauge and dipstick in an external tube.
Oil pans are not interchangeable without the alloy intermediate plate. Swapping sumps requires the oil pan, intermediate plate, windage tray, oil pickup, oil level gauge (where fitted) and dipstick/tube.

Mine has a front bowl sump with external dip stick

= LS400 or Celsior

Intake:
All plenums are the same except for the badge on top.
Crown – all have traction control on Throttle body.
SC400 - may or may not have traction control depending on model in range.
LS400 - all have traction control.
Celsior - all have traction control.
Resonance chamber is different between all three engines.
Intake pipe is different between all three engines.

Mine has traction control

= SC, LS or Celsior

Air filter assembly:
Crown UZS131 - use round assembly.
Crown UZS 141 & UZS151 – uses rectangular assembly.
SC400 - uses rectangular assembly.
LS400 - use round assembly
Celsior – use round assembly

The intake that came with it (never used it) was rectangle

= Crown or SC

Fuel lines:
Crown and SC400 fuel lines enter and exit from behind the cam covers.
LS400 fuel lines enter and exit lower on the engine. They enter and exit under the exhaust manifold

Mine exit behind cam covers

= Crown and SC

Cooling fan:
Crown - has viscous fan driven from an idler above the crank pulley
SC400 - has hydraulic fan driven by a pump in the same location as the Crown idler.
LS400 – has viscous fan driven from an idler above the crank pulley
Celsior - has viscous fan driven from an idler above the crank pulley

Hydraulic fan via pump

= SC400

Oil filters mounting assemblies:
Crown UZS131 - has the filter mounted at the rear of the engine with a long rigid adaptor bolting to the front of the engine and supported at the rear.
Crown UZS 141 & UZS151 - same as SC400
SC400 - have filter mounted below air conditioning compressor
LS400 - have filter mounted below the air conditioning compressor like the SC400 but slightly further back.
Celsior – have filter mounted below the air conditioning compressor like the SC400 but slightly further back.

Filter mounts in line with the rear of the compressor, I assume that means:

= LS400 or Celsior

Power steering:
Crown UZS131 - p/s pump has the reservoir attached to it.
Crown UZS 141 & UZS151 - p/s pump has the reservoir attached to it
SC400 - uses remote reservoir.
LS400 - p/s pump has the reservoir attached to it.
Celsior - p/s pump has the reservoir attached to it.

Pump has reservoir attached

= Crown, LS or Celsior

ECU:
Crown UZS131 - has two modules the ECU runs the engine and the ECT runs the transmission. The ECU is happy to run without the ECT
Crown UZS 141 & UZS151 – has single ECU/ECT and can be hard to run without the transmission or external sensors.
SC400 - uses single ECU/ECT.
LS400 - uses single ECU/ECT.
Celsior - uses single ECU/ECT.

Single ECU

Exhaust:
All three have different, but nonetheless inefficient headers/manifolds. Cats mount in different locations as well.
Crown - by far the smallest least efficient setup. Good if room is tight.
SC400 – the in between set.
LS400 - neat “LOG” style headers that should fit in some tight places.
Celsior – as for LS400

Headers looked quiet high flowing, they wouldn't fit in my chassis and I had to get Crown headers

= SC or LS?






As you can see, some of them point solely to one option, I think the majority say SC400. But then some things totally contradict it, like having a front sump.....

Only the SC400 has a hydraulic fan like mine, yet only the LS400/Celsior have a front sump, like mine......:shrug:

 

[Peewee]

The Celsior also runs a Hydraulic fan pump.

I'd say you have a Celsior motor with a different airbox.
I can't explain your fuel lines though.


Its possible you have a UZS141 Crown motor (not sure if they were released in 92 or 93) which itself is different to Celsior (UZS141 is a front sump too)

 

[duza]

Nem,
I bought my half cut from SSS like you did, I think. It was definitely a Celsior and seems to share the same characteristics that yours does. Front sump, hydraulic fan, fuel lines exiting behind cam, traction control and engine mounts. My leads were not marked with any year, but Sideshow thinks it is 92-94 as far as wiring goes. my understanding (far from expert) is that the LS400 is just the Aussie version of an Celsior. The Crowns were generally older, around 89ish.

 

[stevechumo]

Nemesis,

Check out this thread for some picture of the LS and SC engine. : http://www.lextreme.com/forums/showthread.php?t=10886

From visual inspection, the LS has the engine mounts located a little further back of the engine. The exhaust headers are bigger and seem to have better flow. The LS oil filter block protrudes out of the engine and is a little further back to the engine. However, the LS oil pan (steel bottom) sits to the front, while the SC sits to the rear. I just bought the JDM 92 LS and it also has the same cam/sparkplug cover with the wording "V8 FOUR CAM 32" like the 95 SC USDM.

 

[Peewee]

my understanding (far from expert) is that the LS400 is just the Aussie version of an Celsior.

The Aussie LS400 runs a viscous fan (like the UZS131 Crown) where as the Celsior runs a hydro fan.

I'm not sure if there are any other differences between the two, but I'd hazard a guess that that is probably it.

 

[madmont]

Hydraulically driven fan comes on Crown majesta UZS141 . Check the part number on your ECU this will tell you what it came out of

 

[gloverman]

We get lots of JDM import motors and my first guess would be crown Majesta, my second guess would be celsior. Both have the hydralic fan and front sump.

 

[RedPhoenix]

I dont think thats entirely accurate... like the first one...

SC400 - has the Toyota logo on the plenum and “V8 FOUR CAM 32” on the plug covers

Mine was Lexus badged... maybe it was the over seas thing.

 

[stevechumo]

I dont think thats entirely accurate... like the first one...

SC400 - has the Toyota logo on the plenum and “V8 FOUR CAM 32” on the plug covers

Mine was Lexus badged... maybe it was the over seas thing.

Only USDM has the L badge on the top intake manifold cover. Other countries have the T badge instead of the L. I just bought a JDM engine and it looks like that. It's because Toyota call them Toyota Soarer in other countries, but not Lexus SC400.

 

[RedPhoenix]

lol my bad, i thought the statement was for ALL 1uz's not the over seas ones... hehe