Engine Turning Key – A Small Tool, But a Crucial One

When servicing truck engines, such as those from Volvo or DAF, a crankshaft wrench is a tool that significantly simplifies and protects the entire repair process. Although often overlooked, its absence can lead to serious consequences – both technical and financial.

Why use a wrench to turn the engine?

When setting the timing, checking the timing marks, replacing the accessory belt, or checking valve clearances, precise and safe crankshaft rotation is essential. Using inappropriate methods—for example, rotating the engine using the pulley bolt or starter motor drive—can result in:

• damage to the threads or the central shaft screw
• distortion of the timing system components

How does the process work and look like?

A special engine rotation wrench is designed to fit directly onto the crankshaft sprockets or service socket. Once installed, the mechanic can rotate the crankshaft by hand, with complete control over the piston position. This is crucial for precision operations, such as setting a piston to TDC (top dead center).

Benefits of using a dedicated key:

• component safety – no risk of damage to screws, threads, or sensors
• precision – controlled, slow rotation enables accurate timing setting
• time saving – faster and more reliable setting of working positions
• professionalism – work in accordance with the manufacturer's service instructions

It's a small tool, but its use makes a big difference – both to the quality of the repair and the engine's durability. It's an absolute must-have for truck servicing. You can find it at Autos .

Volvo engine turning wrench by KS Tools (A: 0203892) DAF engine turning key (A: 0236133)