Basically, an idler pulley is a smooth wheel that helps guide and maintain tension on your timing belt. It doesn't really do anything actively, it just supports the belt’s path around the engine. It keeps everything lined up and moving smoothly. Sometimes there’s more than one in the timing system, depending on the engine. Think of it like a support beam in a building. It’s not holding a ton of weight directly, but it's essential for the structure’s overall stability. In your engine, it ensures the timing belt stays properly aligned and doesn't flap around. It works with the tensioner, but it's not the tensioner itself. The tensioner actively pulls the belt tight, and the pulley guides it along the way. If this pulley fails, you’ll notice if it’s really bad – usually with a pretty loud squealing or rattling noise coming from the engine. But even before it gets to that point, a worn or failing pulley can cause the timing belt to misalign. That's serious. If the timing belt jumps a tooth because of pulley issues, it can throw off the engine’s timing and cause major engine damage – we’re talking bent valves, piston damage, the whole nine yards. It acts like a shield protecting the critical timing of your engine. They’re usually replaced whenever you replace the timing belt itself as preventative maintenance. We carry a good selection of these at Fixparts Online, and it's generally a pretty straightforward replacement for most mechanics. Your satisfaction is our priority: Idler Pulley (MPN ADK87617) is covered for 12 months!

About Blue Print

Offering exceptional aftermarket solutions, Blue Print is synonymous with reliability and precision for global automotive needs.

Why Choose Blue Print?

• We offer a huge range of parts for European cars – everything from AdBlue tanks to wheel bearings. • Blue Print parts are made to the same standards as original equipment, so you know they’ll fit and work well. • We’re trusted by garages and car owners across the country for quality and reliability. • You get great value for your money – top quality parts at a competitive price. FixParts Online – Your Trusted Source for Quality Blue Print Auto Parts.