Engine service procedures that do not require removal from the vehicle
Common parameters
Characteristic | Meaning |
Designation of engines | |
8-cylinder (V8) petrol engine 4.7 l | 2UZ-FE |
6-cylinder (R6) turbo diesel engine 4.2 l | 1HD-FTE |
Engine volume, l (cm3) | |
Gasoline engine 2UZ-FE | 4.7 (4663) |
Diesel engine 1HD-FTE | 4.2 (4164) |
Developed power and torque, kW @ min–1/Nm@min–1 | |
Gasoline engine 2UZ-FE | 173@4800/434@3400 |
Diesel engine 1HD-FTE | 150@3400/430@1400 - 3200 |
Cylinder numbering (counting from the timing side) (refer to the accompanying illustration in Specifications to the head Vehicle settings and routine maintenance) | |
Engine 2UZ-FE | |
Left bank of cylinders | 1-3-5-7 |
Right row | 2-4-6-8 |
Engine 1HD-FTE | 1-2-3-4-5-6 |
Ignition order | |
Engine 2UZ-FE | 1-8-4-3-6-5-7-2 |
Engine 1HD-FTE | 1-4-2-6-3-5 |
Compression ratio | |
Engine 2UZ-FE | 9.6:1 |
Engine 1HD-FTE | 18.8:1 |
Block material | Cast iron |
Head material (OK) cylinders | |
Engine 2UZ-FE | Aluminum |
Engine 1HD-FTE | Cast iron |
Maximum allowable non-flatness | |
Engine 1HD-FTE | |
cylinder head | 0.10 |
Inlet pipeline | 0.15 |
exhaust manifolds | 0.50 |
Cylinder block | 0.07 |
Diameter of bolts for fastening cylinder heads of 2UZ-FE engine at a distance of 80 mm from their heads, not less than, mm | |
Rated value | 9.810÷9.960 |
Limit value | 9.700 |
Diameter of the tensile part of the bolts for fastening the bearing caps of the crankshafts of the engine 2UZ-FE, not less than, mm | |
Rated value | 10.760÷10.970 |
Limit value | 10.400 |
Oil pressure at 3000 rpm, bar | |
Engine 2UZ-FE | 3.0 x 6.0 |
Engine 1HD-FTE | 2.5 x 6.1 |
Cylinder diameter x piston stroke, mm | |
Engine 2UZ-FE | 94 x 84 |
Engine 1HD-FTE | 94 x 100 |
Compression ratio | |
Engine 2UZ-FE | 9.6:1 |
Engine 1HD-FTE | 18.8:1 |
Camshafts and related components
Characteristic | Meaning |
Diameter of bearing journals, mm | |
2UZ-FE | 26.954÷26.970 |
1HD-FTE | |
Neck №1 | 34.969÷34.985 |
Other necks | 27.986÷27.998 |
Clearances in bearings, mm | |
2UZ-FE | |
Rated value | 0.030÷0.067 |
Limit value | 0.10 |
1HD-FTE | |
Rated value | |
Neck №1 | 0.022÷0.074 |
Other necks | 0.023÷0.075 |
Limit value | 0.100 |
Jaw height, mm | |
2UZ-FE | |
Rated value | |
Intake valve cams | 41.94 ÷42.04 |
Exhaust valve cams | 41.96÷42.06 |
Limit value | |
Intake valve cams | 41.79 |
Exhaust valve cams | 41.91 |
1HD-FTE | |
Rated value | |
Intake valve cams | 48.498÷48.598 |
Exhaust valve cams | 50.734÷50.834 |
Limit value | |
Intake valve cams | 47.998 |
Exhaust valve cams | 50.234 |
The value of axial play, mm | |
2UZ-FE | |
Rated value | |
intake shaft | 0.040÷0.090 |
exhaust shaft | 0.040÷0.085 |
Limit value | 0.12 |
1HD-FTE | |
Rated value | 0.10÷0.20 |
Limit value | 0.30 |
Backlash of engagement of gear wheels of camshafts, mm | |
2UZ-FE | |
Rated value | 0.020÷0.200 |
Limit value | 0.30 |
Free gap length in the camshaft gear spring lock | |
2UZ-FE | 18.2÷18.8 |
Maximum permissible value of the lateral runout of the middle neck, mm | |
2UZ-FE | 0.08 |
1HD-FTE | 0.10 |
The amount of protrusion of the timing belt tensioner, mm | |
2UZ-FE | 10.5÷11.5 |
1HD-FTE | 9.0÷9.8 |
Parameters of valve lifters, mm | |
2UZ-FE | |
Outside diameter | 30.966÷30.976 |
seat diameter | 31.000÷31.016 |
Landing gap | |
Rated value | 0.024÷0.050 |
Maximum allowable value | 0.07 |
1HD-FTE | |
Outside diameter | 40.892÷40.902 |
seat diameter | 40.960÷40.980 |
Landing gap | |
Rated value | 0.058÷0.083 |
Maximum allowable value | 0.10 |
Tightening force of threaded connections, Nm
Gas engine (2UZ-FE)
Connection type | Meaning |
Bolts of fastening of covers of heads of cylinders | 6 |
Bolts/nuts of fastening of the inlet pipeline | 18 |
Exhaust manifold nuts | 44 |
Nuts of fastening of a reception pipe to a collector | 62 |
Heat shield fixing bolts | 7.5 |
Bolt of fastening of a pulley of a cranked shaft | 245 |
Cover bolts No. 2 of the timing drive | 16 |
Cover bolts No. 3 of the timing drive | 7.5 |
Bolts of fastening of intermediate rollers* | 35 |
Bolt (106 mm) and nuts for fastening the drive belt tensioner | 16 |
Timing belt tensioner mounting bolts | 26 |
Bolts of fastening of cogwheels of camshafts | 108 |
Fan bracket mounting bolts | |
Bolts 12 mm | 16 |
Bolts 14 mm | 32 |
Bolts of fastening of covers of bearings of camshafts | |
Bolts 25 mm | 7.5 |
Other bolts | 16 |
Bolts of fastening of heads of cylinders | |
Stage 1 | 32 |
Stage 2 | Stretch another 90 degrees. |
Stage 3 | Stretch another 90 degrees. |
Bolts of fastening of the top part of the pallet of a case | |
Bolts 10 mm | 7.5 |
Bolts 12 mm | 28 |
Bolts of fastening of the top part of the pallet of a case | 7.5 |
Oil intake bolts | 7.5 |
Damping plate mounting bolts | 7.5 |
Oil pump pinch bolts | 10 |
Oil pump mounting bolts | |
Bolts 14 mm | 30 |
Other bolts | 15 |
Power Steering Pump Mounting Bolts | 17 |
Oil cooler fixture | 18 |
Flywheel mounting bolts* | 83 |
Bolts of fastening of a driving disk* | |
Stage 1 | 49 |
Stage 2 | Stretch another 90 degrees. |
Engine mounts | |
Bolts of fastening of the holder of a back epiploon of a cranked shaft | 7.8 |
* Before screwing in the bolt, its threaded part should be lubricated with Loctite 242 fixing sealant. |
Diesel engine (1HD–FTE)
Connection type | Meaning |
Bolts of fastening of a head of cylinders | |
Stage 1 | 69 |
Stage 2 | Stretch another 90 degrees. |
Stage 3 | Stretch another 90 degrees. |
Bolts of fastening of covers of bearings of camshafts | 25 |
Bolts of fastening of a back cover of a timing belt | 20 |
Bolts of fastening of covers of heads of cylinders | 6.5 |
Fasteners of a back arm of the engine | 39 |
Exhaust manifold mounting bolts | 40 |
Coolant outlet pipe bolts | 20 |
Nuts of fastening of the inlet pipeline | 20 |
Fasteners for high pressure fuel pipes | 25 |
Fixture of an inlet branch pipe to the inlet pipeline | |
Models with EGR system | 19.6 |
Models without EGR system | |
With 10 mm sockets | 7.5 |
With 12 mm sockets | 20 |
EGR valve adapter to exhaust manifold nuts | 40 |
EGR valve bracket bolts | 20 |
Bolts of fastening of the bottom cover of a rod | |
Stage 1 | 37 |
Stage 2 | Stretch another 90 degrees. |
Bolts of fastening of covers of radical bearings of a cranked shaft | |
Stage 1 | 103 |
Stage 2 | Stretch another 90 degrees. |
Camshaft gear | |
driven | 98 |
Leading | 31 |
Injection pump drive gear | 98 |
idler gear | 68 |
crankshaft pulley | 430 |
Bolts of fastening of a cover of cogwheels | 20 |
Nuts of fastening of a cover of the oil pump | 39 |
Bolts of fastening of an oil pipeline | 20 |
Oil pump pressure reducing valve plug | 42 |
Oil pump filler plug | 9 |
Oil cooler check valve | 27 |
Oil cooler relief valve | 39 |
Nuts of fastening of a cover of an oil cooler | 20 |
Oil cooler fixture | 20 |
Engine General and Overhaul Procedures (gasoline engine 2UZ-FE)
Common parameters
Characteristic | Meaning |
Compression pressure in cylinders at 250 rpm, kgf/cm2 | |
Rated value | 13.44 |
Minimum allowed value | 9.94 |
Permissible compression pressure difference in different cylinders at 250 rpm, kgf/cm2 | no more than 0.98 |
Valve mechanism
Characteristic | Meaning |
Height of the cylindrical part (girdle) valve plates, mm | |
Rated value | |
intake valves | 1.25 |
exhaust valves | 1.4 |
Limit value | 0.5 |
Valve stem diameter, mm | |
intake valves | 5.470÷5.485 |
exhaust valves | 5.465÷5.480 |
Gap of landing of cores of valves in directing plugs, mm | |
intake valves | |
Rated value | 0.025÷0.060 |
Limit value | 0.08 |
exhaust valves | |
Rated value | 0.030÷0.065 |
Limit value | 0.10 |
Valve chamfer, degrees | 44.5 |
Full valve length, mm | |
intake valves | |
Rated value | 95.05 |
Crankshaft journals | |
Crankshaft bed diameter, mm | |
Label <1> | 71.000÷71.003 |
Label <2> | 71.006÷71.012 |
Label <3> | 71.012÷71.018 |
Diameter of main journals, mm | |
Label <1> | 66.994÷67.000 |
Label <2> | 66.988÷66.994 |
Label <3> | 66.982÷66.988 |
Thickness of liners of radical bearings, mm | |
Label <2> | 1.979÷1.982 |
Label <3> | 1.982÷1.985 |
Label <4> | 1.985÷1.988 |
Label <5> | 1.988÷1.991 |
Label <6> | 1.991÷1.994 |
Operating clearance in bearings, mm | |
Rated value | 0.036÷0.054 |
Repair size | 0.037÷0.077 |
Maximum permissible operating value | 0.100 |
Axial backlash of a cranked shaft, mm | |
Rated value | 0.040÷0.240 |
Maximum permissible operating value | 0.30 |
Thickness of repair thrust bearing, mm | 2.930÷2.980 |
Block and cylinder head
Characteristic | Meaning |
Cylinder diameter, mm | |
Nominal | |
Label <1> | 94.000 ÷ 94.010 |
Label <2> | 94.010 ÷ 94.020 |
Label <3> | 94.020 ÷ 94.030 |
Permissible | |
Before 1st repair | 94.23 |
Before 2nd repair | 94.73 |
Drilling diameter for valve guide, mm | |
Nominal | 11.504 ÷ 11.525 |
Repair | 11.554 ÷ 11.575 |
Guide sleeve inner diameter, mm | 7.010 ÷ 7.030 |
Sleeve protrusion, mm | 17.5 ÷ 17.9 |
Pistons and piston rings
Characteristic | Meaning |
Piston diameter (nominal value), mm | |
Label <1> | 93.845 ÷ 93.855 |
Label <2> | 93.855 ÷ 93.865 |
Label <3> | 93.865 ÷ 93.875 |
Piston protrusion from the cylinder block, mm | 0.175 ÷ 0.425 |
Piston fit clearance in cylinders, mm | |
Rated value | 0.145 ÷ 0.165 |
Maximum permissible operating value | 0.215 |
Clearances in piston ring locks, mm | |
Top compression ring | |
Rated value | 0.27 ÷ 0.47 |
Limit value | 0.85 |
Second compression ring | |
Rated value | 0.40 ÷ 0.65 |
Limit value | 0.90 |
Oil scraper ring | |
Rated value | 0.20 ÷ 0.50 |
Limit value | 0.88 |
Ring fit gaps in piston grooves, mm | |
Top compression ring | 0.050 ÷ 0.095 |
Second compression ring | 0.050 ÷ 0.100 |
Oil scraper ring | 0.030 ÷ 0.070 |
Maximum allowable clearance | 0.20 |