Honda J32A Engine Specification & Changes

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In 1998, a new J-engine was released on the basis of J30A. This engine was named J32A, and it uses a V6 J30 cylinder block. In this cylinder block, the bore was increased to 89 mm, and the deck height was left unchanged at 235 mm. The length of piston rods was of 162 mm, and the compression height of the piston was 30 mm. All this allowed adding an extra 200 cm3 of displacement and getting the total of 3.2 litres. Two 12-valve SOHC heads with a VTEC system are used here. The diameter of the exhaust valves was increased to 30 mm, and the intake valves – to 34 mm and featured a new intake and exhaust manifolds.

The Honda J32 engine firing order remained unchanged 1-4-2-5-3-6 and uses a timing belt; which is to be replaced after every 60,000 miles and the valves are to be adjusted after every 25,000 to 30,000 miles. Valve clearances (for a cold engine) are: intake 0.2-0.24 mm, exhaust 0.28-0.32 mm and the fuel injectors size is 240 cc/min.

Along with J32A, other J-series engines were made: J25, J30, J35 and J37. The throttle body diameter is 64 mm and in 2008, production J32A stopped and it was replaced by a 3.5-litre J35.

J32A engine modifications and differences

• 1. J32A1 is the first version of J32. This engine has the compression ratio of 9.8, and the VTEC system is triggered after 3,500 rpm. Its power was 225 HP @ 5,500 rpm, the torque was 264 Nm @ 4,800 rpm. Such an engine was installed under the hood of Honda Inspire, Acura TL and Acura CL.
• 2. J32A2 is different from J32A1 by new pistons (compression ratio 10.5), it heads flow is better, J32A Type S cams are more aggressive and are the most sporty of all J-engines camshafts. Here the VTEC system is used that is triggered after 4,800 rpm. A modified 2-Stage intake manifold is used that is triggered after 3,800 rpm. They installed an increased 68 mm throttle body, 36 mm intake valves, stiffer valve springs, and a sportier exhaust system. As a result of these improvements, the power of J32A2 increased to 260 HP @ 6,100 rpm and torque was 314 Nm @ 3,500 rpm. This engine was created for Acura CL Type S and Acura TL Type S.
• 3. J32A3 is an improved version of the J32A2, but its head was created on the basis of J32A1 head. The compression ratio was increased to 11, a cold air intake system is used, as well as a 2-Stage intake manifold (triggered after 4,000 rpm), 35 mm intake valves, a new exhaust manifold, and a modified exhaust system. The VTEC switches after 4,700 rpm. Data upgrades added a little power and J32A3 boasts 270 HP @ 6200 rpm, the torque is 323 Nm @ 5000 rpm. You can find this engine in a 3rd generation Acura TL V6.