You can go to any online forum or comment section, and any praise for the Korean brand will immediately be shot down as propaganda. A great choice is to buy a used supercharger kit in a good condition.Kia is a brand that many online commenters love to hate. In this case, you completely remain stock internals. The supercharged 3RZ engine has a power of 225 HP, if you use the stock 2.75” size pulley. You can buy 3RZ TRD supercharger kit, but its price is higher than that of the turbo kit. It is better to buy 2UZ engine and make a swap.
Making more powerful designs using forged pistons, ARP head studs is a bad idea. It is installed on the stock internals and at a maximum boost pressure of 7 psi (0.5 bar), it gives additional 100 horsepower. You can simply buy 3RZ turbo kit that uses a Garrett T3/T04B turbocharger. It is not too impressive, is it? You can go further and buy ITB, cams, and so on, but the cheaper option is to build 3RZ turbo. You can buy a cold air intake, short intake manifold, big throttle body, header and performance exhaust system.Īfter ECU configuration, these performance upgrades will give you about 180 HP. SuperchargerĬonstruction of a good high RPM naturally aspirated engine on the basis of 3RZ is not the best idea. In all other respects, it is an excellent engine. It is durable, but after 120,000 miles (200,000 km), it stretches and 3RZ knocking occurs. If your engine has passed over 120,000 miles (200,000 km), then you should check the timing chain condition.
3RZ longevity is very high, its lifespan can exceed 250,000 miles of mileage (400,000 km). In this case, you will never need major repairs. You just need to maintain it regularly, adjust the valves when needed, and use good quality engine oil and gasoline. The 3RZ engine construction is very simple and reliable. This is a rare case when the engine is designed without any serious flaws and faults. Toyota 3RZ engine problems and malfunctions This engine was being produced until 2004, later it has been replaced by a new 2TR-FE.
Toyota 3l engine reliability series#
The firing order for the 3RZ-FE engines is 1-3-4-2.īesides 3RZ, Toyota RZ series consists of a 2 liter 1RZ and 2.4 liter 2RZ. It also uses the multi point injection system and electronic spark advance (ESA) ignition system. To increase the torque at low revs, the 3RZ-FE uses a long runner intake manifold. The intake camshaft is driven by a timing chain. The valves clearances (in a cold engine): 0.15-0.25 mm inlet, 0.25-0.35 mm outlet. This head does not use hydraulic lifters, so you have to adjust the valves clearances after every 20,000 miles of mileage (30,000-40,000 km). The diameter of the inlet valves is 37.5 mm, exhaust – 30.5 mm. On the top of the cylinder block, the aluminum DOHC cylinder head with four valves per cylinder is mounted. They serve to counterbalance the inertia forces of the second order. The 3RZ engine uses 2 balancer shafts, located in the crankcase. This is due to the 95 mm cylinder bore and forged crankshaft with eight counterweights and 95 mm stroke. It had a rather large displacement as for straight-4 configuration. The 3RZ engine was designed for the off-road and commercial vehicles. This engine has completely replaced the 22R-E within three years. In 1994, Toyota launched the new 3RZ-FE engine. Toyota 3RZ-FE engine reliability, problems and repair Normal engine operating temperature, ☌ (F)
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