Toyota 1HZ Repair Manual

FUEL SYSTEM - Injection Nozzles (1 HD-T) FU-25
(d) Pump the tester handle slowly and observe the pres-
sure gauge.
(e) Read the pressure gauge just as the injection pressure
begins to drop.
l\lo.1 opening pressure: 180-190 kg/cm
2
(2,560-2,702 psi)
(17,652-18,633 kPa)
HINT: Proper nozzle operation can be determined by a
swishing sound.
If the opening pressure is not as specified, disassemble the
nozzle and change the adjusting shim on the top of the
No.1 pressure spring.
HINT:
• Varying the adjusting shim thickness by 0.01 mm
(0.0004 in.) changes the injection pressure by about 1.5
kg/cm
2
(21 psi, 147 kPa).
• Only one adjusting shim should be used.
(f) There should be no dripping after injection.

Toyota 1HZ Specifications

General

Fuel Type	Diesel
Maximum Power	96 kW (129 hp) at 3800 rpm
Firing Order	1-5-3-6-2-4
Aspiration	Naturally aspirated
Fuel System	Direct injection
Cooling System	Water-cooled
Displacement	4.2 L (4164 cc)
Maximum Torque	285 N·m (210 lb·ft) at 2200 rpm
Valvetrain	SOHC, 12 valves (2 per cylinder)