Toyota 1JZ-GE Engine

A classic powerplant for the 1990s, Toyota’s 2.5-liter 1JZGE engine was first introduced in Mark II X80 sedans and quickly earned a reputation as one of the decade’s most reliable engines. Featuring superior cast iron blocks with 24 valve cylinder heads and driven by ribbed belt technology, this powerful motor saw production from 1990 to 2007 at Tahara Plant in Japan—only available on rear-wheel drive models equipped with automatic transmissions! The 1995 model featured an upgrade to VVT-i system design that optimized its ACIS intake geometry change capabilities along wtih trochoid type oil pumps; allowing it continued success throughout the end of its run until 2007.

In 1996, the JZ family of engines underwent a major revamp that marked an impressive list of changes. To start off, valve timing VVT-i was added on to the intake shaft while a DIS-3 type ignition system took its place and compression ratio increased from 10 to 10.5 – making it possible for power output to leap up from180 hp all way up 200 hp as well as torque jump in value from 235 Nmto 255 Nm .These enhancements cemented this engine’s reputation within car industry with 6 sub families being separate parts namely; 1JZ‑GE, 1JZ‑GTE, 1JZ‑FSE, 2JZ‑GE, 2JZ‑GTE, 2JZ‑FSE.

Engine specifications for Toyota 1JZ-GE 2.5 l

First generation of 1990 without VVT-i

Second generation 1996 with VVT-i

The dry weight of the 1JZ-GE engine is 210 kg

1JZ-GE 2.5 l information

The legendary Toyota 1JZGE inline six debuted in 1990 on the Mark II X80 sedan. The design was very similar to its 7M-series predecessor: cast-iron 6-cylinder block, 24-valve main cylinder head without hydro-compensators, belt-driven timing and ignition system with a trambler. There were also many differences: all three gears were now driven by a single crescent belt, ACIS intake geometry changing system and another trochoidal oil pump.

In 1996, this engine was seriously upgraded, and the list of changes is impressive. First of all it was a VVT-i variable valve timing system on the intake shaft, the timeless DIS-3 ignition system, and the compression ratio was increased from 10 to 10.5. All this allowed to increase power from 180 to 200 hp and torque from 235 to 255 Nm.

Fuel consumption 1JZ-GE

1999 Toyota Mark II with automatic transmission as an example (l/100km):

What cars use the Toyota 1JZ-GE

Reviews on 1JZ-GE engine

Advantages:

• Legendary for its reliability engine
• Great selection of new and used parts
• It is easy to find a donor at the secondary market
• Great tuning possibilities

Disadvantages:

• Relatively high fuel consumption
• Ignition system is very afraid of water
• Oil consumption is common
• Hydraulic compensators are not provided

Toyota 1JZ-GE 2.5 l maintenance

Problems & disadvantages of the двигателя 1JZ-GE

Oil Compounding

This is a very reliable motor without any weaknesses and all its problems are from old age. However, at high mileage it often wastes oil due to ring and cap wear.

Low life of the VVT-i system

After the 1996 update, the VVT-i phasor regulator was introduced here with a low service life. The symptoms of its failure are floating rpm or crackling when starting.

Glitches in electrics

In contrast to the predecessors of the M-series, this engine has received many sensors, which can often malfunction. For a complete list of electrical problems, click here.

Minor Breakdowns

Minor problems with this powertrain include a modest water pump life, an unreliable timing belt tensioner, and an ignition system that is afraid of water. Also, the engine likes to flood the spark plugs, and the thermal valve clearance needs to be adjusted.

The manufacturer says the engine life is 300,000 km, but it easily goes over 500,000 km.