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That will help to eliminate vibrations.Īpart from the above-mentioned things, the oil pressure switch is frequently disarranged, and the rear crankshaft oil seal leaks time after time. If everything is alright, clean injectors and replace the fuel filter. You should check engine mounts, especially the anterior one. It is induced by a worn-out 1NZ alternator belt. If any, the problem can be solved by cleaning a throttle body unit and idle control valve.Ĥ. One also should inspect the timing chain tensioner.ģ. In order to handle the problem, you must get a new timing chain. If any, your timing chain has been strained. If that happens, you need to replace valve stem seals and piston rings.Ģ. After running more than 100,000 miles (150,000 km) of mileage, 1NZ engines can start excessively consuming oil. An updated model possesses a compression ratio of 13.4 and a capacity of 74 HP at 4,800 rpm with a torque of 111 Nm (82 lb Compression ratio is increased to 13, power is 76 HP at 5,000 rpm, and a torque is 115 Nm (85 lb It works by Atkinson cycle with a little bit delayed inlet valve closure. The 1NZ-FXE model (1997 – present) is a type designated for hybrid engine automobiles. It has 10.5 compression ratio, 109 HP power at 6,000 rpm, and a torque of 141 Nm (103 lb The 1NZ-FE model (2000 – present) is a basic motor.
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Toyota 1NZ engine modifications and differencesġ. While assembling the 1NZs, its successor 2NR, 5NR and 7NR have been designed since 2010. Nowadays the 1NZs are still being produced. In general, the engine is more like Toyota ZZ models.
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The 1NZ engine has got a single-row timing chain with a 8-mm pitch of chain. The 5A engine was fitted with a timing belt. It was necessary to adjust the valves at all the previous motors each 12,000 miles (20,000 km) of mileage. Since 2004 the 1NZ hydraulic lifters have started to be assembled. While making all that, a cylinder head with a VVTi variable valve timing system was run on the inlet camshaft. In contrast to its predecessor, a light aluminium cylinder block, a brand new crankshaft, pistons, connecting rods and others were used here. The engine is designated for 5A-FE replacing. The NZ consists of only two motors: a 1.5-liter 1NZ and a 1.3-liter 2NZ. They were designed specially for small class vehicles. Toyota 1NZ-FE engine reliability, problems and repair Normal engine operating temperature, ☌ (F)