Can you replace 1zz engine inplace of 3zz engine?

Yes, it is possible to replace a 1ZZ engine with a 3ZZ engine in some vehicles. The 1ZZ and 3ZZ engines are both 1.8-liter inline-four engines that were produced by Toyota. However, there are some key differences between the two engines that need to be considered before attempting a swap.

First, the 3ZZ engine has a higher compression ratio than the 1ZZ engine. This means that it will produce more power but will also require higher-octane fuel. Second, the 3ZZ engine has a different intake manifold and exhaust manifold than the 1ZZ engine. This means that some modifications will be necessary to get the 3ZZ engine to fit into the vehicle that was originally equipped with a 1ZZ engine.

Finally, the 3ZZ engine uses a different engine control unit (ECU) than the 1ZZ engine. This means that the ECU will need to be reprogrammed or replaced in order to work with the 3ZZ engine.

Overall, it is possible to replace a 1ZZ engine with a 3ZZ engine, but it is not a straightforward swap. Some modifications will be necessary, and it is important to make sure that the 3ZZ engine is compatible with the vehicle before attempting the swap.