variable valve timing Archives - UnderhoodService
Lifter Deactivation

The area of contact between the lifters and cam lobes is the highest loaded surface inside an engine.

Understanding Engine Timing – Chains, Gears and Belts

Perfect timing is critical in the performance world, and now, it’s required by your regular customers too.

Verifying Boost Pressure Diagnostics

Boost pressure is determined by the speed of the exhaust turbine.

Variable Valve Timing Strategy

Your diagnostic strategy needs to first focus on the supply of oil and then move outward to other possible problems.

VIDEO: Timing Chain Kit Unboxing

Andrew Markel and Cody Smith come together to open a Cloyes timing chain kit to determine what comes with each kit.

The Importance of Clean, Quality Oil in Timing Chain Systems

Using the wrong oil is a common problem that causes a vehicle’s timing chain to wear even quicker.

VIDEO: Keeping Up With Variable Valve Timing

Just as with the engine itself, oil is critical to the VVT system. This video is sponsored by The Group Training Academy.

Diagnostic Strategies For Variable Valve Timing Systems

Here are seven diagnostic strategies that can be applied to any vehicle with variable valve timing problems.

Honda Timing Belt Tips

There are some things to keep in mind as you tackle these jobs.

VANOS Variable Valve Timing Diagnostics

Diagnosing a VANOS system does not require that you speak German. What it does demand, however, is knowledge of how the actuator adjusts the camshaft, how the solenoid controls the actuator and when the engine control module changes camshaft timing. As for tools, you will need the appropriate tool set to lock the crank and camshaft. You will also need a scan tool and a scope to observe the crankshaft and camshaft signals to accomplish more advanced diagnostics.

VANOS BMW: Variable Valve Timing Diagnostics

Diagnosing a VANOS system does not require that you speak German. What it does demand, however, is knowledge of how the actuator adjusts the camshaft, how the solenoid controls the actuator and when the engine control module changes camshaft timing. As for tools, you will need the appropriate tool set to lock the crank and camshaft. You will also need a scan tool and a scope to observe the crankshaft and camshaft signals to accomplish more advanced diagnostics.

Timing Chains In Hyundai Engines

Although Hyundai uses a single timing belt on its 2.7L V6 engines, its 3.3L, double-overhead camshaft engine is equipped with one timing chain for each camshaft and one drive chain for the oil pump. At first glance, a timing chain design allows engineers to shorten the overall length of the engine and reduce rotating friction.

timing chain hyundai featured