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Most data copied from "Specifications of the Lexus LS400 Four litre, qaud-cam, EFI V8 engine".
The 1UZ engine is an overhead cam, overhead valve engine with 8 cylinders in V formation.
Each cylinder has 2 inlet, 2 exhaust valves and a central spark plug.
The block and cylinder heads are all alloy with many plastic parts.
Uses a thin cast iron cylinder liner.
Each of the 2 cylinder heads has 2 over head cams.
Heads are of a cross flow type (inner inlet, exhaust outer).
Each of the 2 cylinder heads has its own distributor feeding 2 of its own spark plaugs and 2 plugs on the other bank.
Uses plastic head bolts and 6 plastic mains caps bolts for each piston.
Runs on leaded and unlead fuel but leaded fuel can destroy the catalytic convertor (if fitted).
Exterior dimensions are compact enough to fit into any RWD Celica (requires fitting of rack and pinion steering for clearance).
Inlet cams are driven by a single toothed belt underneath covers with automatic tensioner.
Exhaust cams are driven by gears from the inlet cams.
Valves are adjusted by shims.
Other accessories are driven by a single V ribbed belt with automatic tensioner.
Alternator, power steering pump and air condition pump are solidy mounted.
Factory fitted only with automatic (Castlemain Rod Shop has manual conversion kit).
| Common settings | |
|---|---|
| Bore x Stroke | 87.5x82.2mm (3.44"x3.25") |
| Displacement | 3969cc (242.1ci) |
| Liner thickness | 2mm |
| Bore pitch | 105.5mm |
| Bank offset (left bank is forward) | 21mm |
| Bank angle | 90° |
| Inlet to Exhaust valve angle | 21.33° |
| Max power - Europe | 180kW @ 5400rpm (EEC) |
| Max power - Australia | 190kW @ 5600rpm (DIN) |
| Max power - GCC & general | 180kW @ 5400rpm (SAE-NET) 260HP @ 5600rpm (SAE-GROSS) |
| Max torque - Europe | 350Nm @ 4400rpm (EEC) |
| Max torque - Australia | 360NM @ 4400rpm (DIN) |
| Max torque - GCC & general | 350NM @ 4400rpm (SAE-NET) 37.0kgm @ 4400rpm (SAE-GROSS) |
| Compression | 10:1 |
| Fuel - Europe | unleaded |
| Fuel - austrAlia | unleaded |
| Fuel - GCC | leaded |
| Fuel - general | leaded |
| Firing order | 1-8-4-3-6-5-7-2 |
Many details copied from internetAutoGuide but also verified from other sites.
Same design as the 1UZ-FE except for the larger bore and stroke.
The block is made from cast iron instead of aluminium alloy.
Used in the UZJ100 and UZJ105 landcruiser and Lexus LX470.
| Common settings | |
|---|---|
| Bore x Stroke | 94x84.1mm |
| Displacement | 4663cc |
| Bank angle | 90° |
| Max power | 230HP @ 4800rpm |
| Max torque - Europe | 320Nm @ 3400rpm (EEC) |
| Compression | 9.8:1 |
Same design as the 1UZ-FE except for the larger bore and stroke.
Block is aluminium alloy.
More Toyota/Lexus V8 information at Lextreme.
Last updated 24th Oct 2005