Toyota 1PZ

Toyota 1PZThe Toyota 1PZ is a 3.5 l (3,469 cc, 211.69 cu-in) five cylinders, four-stroke cycle water-cooled naturally aspirated internal combustion diesel engine, manufactured by the Toyota Motor Corporation.

The Toyota 1PZ engine is a five-cylinder variant of the 1HZ engine and as such it shares many of its internals with that engine. The 1PZ engine has a cast-iron cylinder block with 94 mm (3.7 in) cylinder bores and a 100 mm (3.94 in) piston stroke. Compression ratio rating was 22.7:1.

This motor has a cast-iron cylinder head with a single overhead camshaft (SOHC) with two valves per cylinder and indirect injection design.

The Toyota 1PZ produced 116 PS (85 kW; 114 HP) at 4,000 rpm of maximum horsepower and 230 Nm (23.5 kg·m; 169.7 ft·lb) at 2,600 rpm of maximum torque.

The breakdown of the engine code is as follows:

  • 1 – 1nd generation engine
  • PZ – Engine family

General information

Engine Specifications
Engine code 1PZ
Layout Straight-5, vertical
Fuel type Diesel
Displacement 3.5L, 3,469 cm3 (211.7 cu in)
Injection pump Mechanical
Power adder None
Horsepower net 116 PS (85 KW; 114 HP) at 4,000 rpm
Torque output 230 Nm (23.5 kg·m; 169.7 ft·lb) at 2,600 rpm
Firing (injection) order 1-2-4-5-3
Dimensions (L x H x W):

Cylinder block

The cylinder block is made of cast iron. The crankshaft is supported by six bearings on the inside of the crankcase. The crankshaft bearings are made of aluminum alloy. The crankshaft is integrated with ten balance weights which are cast along with it for balance. Oil holes are built into the crankshaft for supplying oil to the connecting rods, bearings and etc. The crankshaft bearing cap is of ladder-frame construction and is incorporated into the crankcase.

Pistons are made of highly temperature-resistant aluminum alloy. The first compression ring is made of steel and the second compression ring is made of cast iron. The oil ring is made of steel.

The cylinder bore is 94 mm (3.7 in), piston stroke is 100 mm (3.94 in) and compression ratio rating is 22.7:1.

Cylinder block
Cylinder block alloy Cast iron
Compression ratio: 22.7:1
Cylinder bore: 94 mm (3.7 in)
Piston stroke: 100 mm (3.94 in)
Number of piston rings (compression / oil): 2 / 1
Number of main bearings: 6
Cylinder bore inner diameter: 94.000-94.030 mm (3.7001-3.7019 in)
Piston skirt diameter 93.885-94.895 mm (3.6962-3.6966 in)
93.950-93.960 mm (3.6988-3.6992 in)
Piston ring groove: First 0.050-0.095 mm (0.0020-0.0037 in)
Second 0.060-0.100 mm (0.0024-0.0039 in)
Oil 0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap: First 0.270-0.540 mm (0.0106-0.0212 in)
Second 0.400-0.620 mm (0.0157-0.0244 in)
Oil 0.200-0.520 mm (0.0079 – 0.0204 in)
Piston pin outer diameter 29.000-29.012 mm (1.1417-1.1412 in)
Piston pin bore diameter 29.008-29.020 mm (1.1420-1.1425 in)
Crankshaft main journal diameter: 66.994-67.004 mm (2.6375-2.6379 in)
Crankpin diameter: 58.994-59.004 mm (2.3225-2.3230 in)
Crankshaft center distance: 50.0 mm (1.9685 in)

Main bearing cap tightening procedure and torque specs:

  • Step 1: 103 Nm; 10.5 kg·m; 76 ft·lb
  • Step 2: Turn all bolts 90°

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod bearing nut

  • Step 1: 37 Nm; 3.75 kg·m; 27 ft·lb
  • Step 2: Turn all bolts 90°

Crankshaft pulley bolt

  • 500 Nm; 50.0 kg·m; 369 ft·lb

Flywheel (M/T) or Drive plate (A/T) fixing bolts

  • 127 Nm; 13.0 kg·m; 94 ft·lb

Cylinder head

The cylinder head is made of cast iron with a cross-flow type intake and exhaust layout. The combustion chambers are swirl chamber type. The camshaft journal part of the cylinder head has camshaft caps made of aluminum alloy and is made of cast iron on the cylinder head side. The camshaft is driven by the timing belt.

The 1PZ engine has OHV design with two valves per cylinder. Intake valves are 42.5 mm (1.6732 in) in diameter, and the exhaust valves are 36.0 mm (1.4173 in). Exhaust and intake valves are equipped with irregular pitch springs which are capable of following the valves even at high engine speeds. The 1PZ engine has a dual-type exhaust manifold.

Adjustment of the valve clearance is done by means of an outer shim type system, in which valve adjusting shims are located above the valve lifters.

Cylinder head
Cylinder head alloy Cast iron
Valve Arrangement: SOHC
Valves: 10 (2 valves per cylinder)
Intake valves diameter: 42.5 mm (1.6732 in)
Exhaust valves diameter: 36.0 mm (1.4173 in)
Intake valves length: 103.29-103.69 mm (4.0665-4.0822 in)
Exhaust valves length: 103.14-103.54 (4.0606-4.00764 in)
Intake valve stem diameter: 7.975-7.990 mm (0.3140-0.3145 in)
Exhaust valves stem diameter: 7.960-7.975 mm (0.3133-0.3140 in.l
Camshaft journal diameter: 1st: 34.969-34.985 mm (1.3767-1.3774 in)
Others: 27.986-27.998 mm (1.1018-1.1023 in)
Camshaft lobe height (intake): 55.090-55.110 mm (2.1689-2.1697 in)
Camshaft lobe height (exhaust): 55.940-55.960 mm (2.2024-2.2031 in)

Head tightening procedure and torque specs:

  • Step 1: 69 Nm; 7.0 kg·m; 51 ft·lb
  • Step 2: Turn all bolts 90°
  • Step 3: Turn all bolts 90°

Camshaft bearing cap

  • 25 Nm; 2.5 kg·m; 18 ft·lb

Maintenance data

Valve clearance (Cold)
Intake valve 0.15-0.25 mm (0.006-0.0098 in)
Exhaust valve 0.35-0.45 mm (0.0137-0.0177 in)
Compression pressure
Standard 37.0 kg/m2 (3,628 kPa, 526 psi) / 250 rpm
Minimun 27.0 kg/m2 (2,648 kPa, 384 psi) / 250 rpm
Compression differential limit between cylinders 5.0 kg/m2 (490 kPa, 71 psi) / 250 rpm
Oil system
Recommended engine oil 10W-30 or 10W-40 (“CC”, “CD” or higher: “CH”, “CI”)
Engine oil capacity Dry fill: 9.6 L (10.1 US qt, 8.4 Imp. qt)
With oil filter change: 9.3 L (9.8 US qt, 8.1 Imp. qt)
Without oil filter change: 8.0 L (8.5 US qt, 7.0 Imp. qt)
Fuel system
Plunger stroke: 0.82-0.88 mm (0.0323-0.0346 in.)
Idling 650 ± 50 rpm

Vehicle applications

Model Years Produced
Toyota Land Cruiser (70-series)
Toyota Coaster (HBB20)
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