![]() ![]() Do what depends on you: regularly perform maintenance of your engine and use good quality engine oil. All this only means that you can face problem at any time. To remove this fault, it is sufficient to clean the throttle body or the EGR valve.Īs to the rest, J30A are good and pretty reliable engines, but all of them are very old, and they have run many thousand miles. These engines often have problems with unstable rpm. Acura J30A engine problems and malfunctions This engine reached 255 HP 6,000 rpm, the torque was 315 Nm 5,000 rpm. JNA1 was a version with an electric motor made for Honda Accord Hybrid. J30Y1 was a modification for the Chinese market. J30A5 was the analog to J30A4, its power was 244 HP 6,250 rpm, the torque was 286 Nm 5,000 rpm.Ĥ. These mods were successful, and the power increased to 240 HP 6,250 rpm, and the torque to 286 Nm 5,000 rpm.ģ. There was also a modified VTEC system, a new intake manifold, an electronic throttle body, and a new exhaust manifold and exhaust system were installed. ![]() J30A4 – this engine uses new pistons (compression ratio 10), the intake valves diameter was increased to 35 mm while the exhaust valves were not changed and remained 30 mm. The power was 200 HP 5,500 rpm, the torque was 264 Nm 4,500 rpm.Ģ. J30A1 is the first modification of the engine, here the VTEC is activated after 3,500 rpm. This is the only version that has not yet been discontinued.Īcura J30A engine modifications and differencesġ. Today, you can buy an Acura RDX in China, and it will be fitted with a J30Y engine. This 3 liter engine was manufactured until 2007, and then it was replaced by the popular J35. The diameter of the throttle body is 60 mm.īased on the J30A engine, a while family of J engines was developed: J25, J32, J35 and J37. The J30A engine uses 240 cc/min fuel injectors. Here are the valve clearances for a cold engine: 0.2-0.24 mm for intake valves, 0.28-0.32 mm for exhaust valves. In addition, you should adjust valves after every 25,000-30,000 miles. Don’t underestimate it, since if the belt breaks the valves will be bent. The camshafts are rotated by a timing belt to be replaced after every 60,000 miles. The J30A is also equipped with a variable valve timing and lift electronic control system VTEC. These heads use 34 mm intake valves, and 29 mm exhaust valves. This cylinder block is covered with two 12-valve SOHC heads. This provides the displacement of 3 liters. Inside this block, there is has a crankshaft with the stroke of 86 mm, 162 mm connecting rods and 30 mm compression height of the pistons. This is a typical 60° V6 engine with a compact aluminum cylinder block, its bore spacing is 98 mm, and the deck height is 235 mm. ![]() In 1997, J30A engine was launched with the displacement of 3 liters. Honda J30A engine reliability, problems and repair Normal engine operating temperature, ☌ (F) ![]()
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