Toyota 1HZ Repair Manual

FUEL SYSTEM - Injection Nozzles (1 PZ and 1 HZ) FU-13
(b) Using a wooden stick, remove the carbon adhering to
the nozzle needle tip.
(c) Using a brass brush, remove the carbon from the
exterior of the nozzle body (except lapped surface).
(d) Check the seat of the nozzle body for burns or
corrosion.
(e) Check the nozzle needle tip for damage or corrosion.
If any of these conditions are present, replace the nozzle
assembly.
2. INSPECT NOZZLE ASSEMBLY
(a) Wash the nozzle in clean diesel fuel.
HINT: Do not touch the nozzle mating surfaces with your
fingers.
(b) Tilt the nozzle body about 60 degrees and pull the
needle out about one third of its length.
(c) When released, the needle should sink down into the
body vent smoothly by its own weight.
(d) Repeat this test, rotating the needle slightly each time.
If the needle does not sink freely, replace the nozzle
assembly.

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)