Get the Best Priced Preglow Time Relay Parts

Preglow Time Relay

Bitter cold temperatures can make it especially difficult to get high-performance diesel engines started. Since diesel vehicles rely on just the right balance of internal temperatures and pressures to initiate ignition, glow plugs and the preglow relays that regulate them are essential to avoid hard starting.

At PartsGeek.com you will find a wide range of preglow timers from top brands like Beck Arnley, Huco, Stribel and Vemo. We pride ourselves on the quality of our parts, our quick delivery times and outstanding customer service. And our 30-day return policy helps us to make absolutely certain that you get exactly the part you need to get driving again.

What is a preglow time relay?

Preglow time relays work in conjunction with the glow plugs (heating devices) that are used in diesel vehicles to enable engine ignition. While standard gas-powered vehicles utilize spark plugs to initiate the ignition explosion, diesel engines require high pressures and temperatures. During periods of very cold weather, certain diesel engines can be difficult or very slow to start.

When electrified, the plugs begin to glow with radiating heat (think of the heating coils in a toaster oven), allowing for fuel combustion despite low environmental temperatures. In older engines the driver would have to manually guess how long the plugs would need to heat up in order to achieve a working temperature. Preglow relays automate this process, communicating with an in-cabin indicator light that signals when the engine is ready to start.

How much does a replacement preglow time relay cost?

The cost of replacement relays will depend on the make and model of your diesel car. Most of the preglow time relays on PartsGeek.com cost between $100 and $200.

What are some symptoms of a faulty preglow timer?

The most common signs of poorly functioning preglow time relays are an illuminated glow plug or check engine light and difficulty getting the engine started. Failing glow plugs may not be able to produce sufficient heat. Meanwhile, failing preglow time relays can lead to even worse issues; timers that fail to keep glow plugs from operating at high temperatures for too long can easily lead to rapid internal parts wear and poor overall engine performance.

What is the difference between an in-cylinder and an in-manifold glow plug?

Engines that use in-cylinder design either employ an individual plug within each cylinder (direct injection) or within a pre-chamber adjacent to the cylinder (indirect injection). In-manifold engine designs use only one plug for all of the cylinders.