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Camshafts are a big part of your engine's valve timing used in electronic fuel injected vehicles to orchestrate the combustion chamber events. The shaft runs the length of the engine, with lobes placed at the right locations to engage your pushrods or rocker arms. Camshaft gears are attached to the end of the camshaft, that is cogged to time the valve opening and closing at the right times.

The timing that the camshaft controls must be exact for your combustion engine to operate at maximum efficiency. When the lobes come in contact with your engine's valvetrain, the intake and exhaust valves complete the four stroke combustion cycle.

Depending on your engine, you will have multiple camshafts but there are usually two camshafts for each bank of your engine. The two camshafts are coupled through either a belt or gear arrangement depending on the location of the camshafts in question.

There will also be a camshaft position sensor that will inform the ECU of the exact location and speed of the camshaft.  Manufactured from a variety of different materials, camshafts can be modified or swapped to gain horsepower and torque. For turbocharged applications, the increase in gains can be substantial when swapping to an aftermarket performance camshaft.

Make sure you check with your local emissions laws to ensure you are not breaking the law by upgrading your camshafts.

How To Install 4G63 Camshafts

This guide shows you how to install the ever so popular 264/272 combination of bumpsticks into a 1993 Mitsubishi GSX.

This GSX put down 395whp @ 17psi with a completely bone stock 1g head and just one exhaust cam gear retarded 5 degrees.

Remember to always rotate clockwise to prevent abnormal slack and any jumping of teeth by your timing belt. You can insert an extension through the access hole in the plastic wheel well splash guard.

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The camshaft position sensor is a 2 pin unit that is connected using a Delrin type weather proof connector, this sensor is located in your cylinder head.

The 2JZ is a tremendously stout engine with a legion of fans and followers most popularized here in the US by the Toyota Supra, one of the true Japanese Supercars. The 2JZGTE camshaft position sensor is a hall effect type sensor, and is located near the rear of your cylinder head.

When testing your camshaft position sensor, most people are looking for the reason as to why their car is not starting or has intermittent ignition problems. As the camshaft position sensor provides a real time positioning of the engine to the PCM, this is a very important reading for your vehicle.

First unplug your crank position sensor, for another look at where this sensor is located on your 2JZ, take a look at this picture.


One of the most powerful four cylinder import engines in stock form is the 4G63, Mitsubishi’s calling card for the past 20+ years.

Capable of generating over 400 wheel horsepower with just a few bolt on modifications, the 4G63 is durable enough to handle the boost you throw at it with stock rods and pistons.

While robust and overbuilt for the boost it needed to run, manufacturing issues in the main thrust bearing and oil jets led to serious defects like crankwalk.

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