In addition to the head, you will need the entire intake and exhaust system. The G4JS engine is an analog of your 4G64, but with a DOHC head. Instead, you need a G4JS DOHC head - such engines were installed in the following cars: If you want to go the non-turbo way, then your SOHC head should be thrown away. It is very reliable, but it has problems with rough idle or vibrations, you can read about them in detail HERE. Since this engine is nothing more than an enlarged 4G63, the problems of these engines are similar. Mitsubishi 4G64 engine problems and malfunctions

However, 4G64 are produced even today, but mainly for Chinese cars. Since 2003, the successor of this engine called 4G69 has been produced. This engine belongs to the Sirius family along with other similar engines: 4G63, 4G63T, 4G61, 4G62, 4G67, 4G69, 4D65, and 4D68. In all these engines, a timing belt is used that needs replacement at least once in 60,000 miles (90,000 km). вЂњ Mitsubishi Galant 2,4LвЂќ by Polska821 / CC-BY 3.0 / Compressed from original The power of these engines is 150 HP at 5,500 rpm, and the torque is 225 Nm at 3,500 rpm.ДЄll of these 4G64 heads are equipped with hydraulic lifters and you donвЂ™t have to worry about valve adjustment. These engines feature a SOHC 16V head with a direct injection system and an increased to 11.5 compression ratio. You can also find a 4G64 GDI under the hood of Mitsubishi Galant, Space Wagon, Space Gear, or Space Runner. The power increased to 156 HP at 6,000 rpm, the torque was 221 Nm at 4,000 rpm. Later still, they started using a more modern DOHC 16V head with a compression ratio of 9:1. The injector size in such a 4G64 is 275cc. This improved the performance and the power reached 145 HP at 5,500 rpm, the torque was 206 Nm at 2,750 rpm. The cylinder head was later replaced by a 16 valve SOHC and the compression ratio increased to 9.5. The compression ratio of these engines is 8.5:1, and the power is 112 HP at 5,000 rpm, the torque is 183 Nm at 3,500 rpm. This block was covered with a SOHC 8-valve head. The crankshaft weighs is 15.8 kg, the pistons weigh is 354 g, and the connecting rods weigh is 623 g. All this provided 2.4 liters of displacement (2.35 liters, to be exact). The compression height of the pistons was 35 mm. The cylinder diameter was increased to 86.5 mm, and the length of connecting rods remained the same - 150 mm. The engineers increased the deck height to 235 mm and installed a long-stroke crankshaft in this block with the piston stroke of 100 mm. LetвЂ™s learn about all the differences between 4G63 and 4G64. This large engine replaced the old 4G54, and had been created based on the 4G63 it also had a closed deck but had a different height of the block.

Mitsubishi 4G64 engine reliability, problems and repair Normal engine operating temperature, вЊ (F) Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co Ltd

2.4 liter engine