Timing Components

Does your timing chain rattle on cold starts, or does your valve timing need to handle more boost and higher revs in your project? Here you'll find chains, cam drive kits and solenoid valves for variable valve timing that keep the camshaft in correct sync with the crankshaft.

What the timing components do

The timing chain and drive kit keep the camshaft in fixed sync with the crankshaft, so the valves open and close at the right moment. On engines with variable valve timing, a solenoid valve regulates the oil pressure to the cam phaser so timing can be adjusted while driving. You'll find, for example, COMP Cams GM LS Gen III/IV C5-R IWIS Single Race Timing Chain, cam drive kits for Ford Coyote 5.0L 4V Ti-VCT and a low-noise chain kit from Hot Cams for Ranger 570. Gates, Wiseco and Edelbrock are also brands in this category.

How to choose timing components

• Engine and model year: Chains and drive kits are typically built for a specific engine family, and even adjacent model years can require different parts.
• Load: Higher revs, stronger valve springs or a more aggressive profile from new camshafts can require a heavier-duty chain – it depends on the project.
• Variable valve timing: The solenoid valve must match the engine's system, connector and control unit.
• The big picture: Look at the timing components together with the rest of the camshafts and valvetrain so the parts match each other.

Installation and maintenance

Incorrectly set timing can cause poor running and, on engines where valves and pistons share space, in the worst case make them hit each other. Follow the manufacturer's marks and torque specs, and turn the engine over by hand before the first start. Tensioners and guide rails are typically replaced together with the chain. Slow or unstable cam phasing can be caused by a faulty solenoid valve, but also by dirty oil or low oil pressure.

Frequently asked questions

When should the timing chain be replaced?

Typical signs are rattling on cold starts, fault codes for camshaft or crankshaft position and visible wear on tensioners or rails. The interval depends on the engine, oil changes and load, so follow the manufacturer's instructions.

Should I replace the solenoid valve or the drive kit if the variable valve timing fails?

It depends on the cause. A cam timing fault code can be caused by the solenoid valve, but also by dirty oil, low oil pressure or a worn chain. Check oil and pressure before you replace parts.

Can I use a racing chain in a street car?

Often, if the chain fits the engine. However, check for the specific part number whether it requires different tensioners or rails, and which inspection intervals the manufacturer specifies, before you choose it for your project.