Parts for your 2020 Subaru Impreza-Sump plug washers

Sump Plug Washers on the 2020 Subaru Impreza: What You Need to Know

When it comes to maintaining your 2020 Subaru Impreza, understanding the components involved in routine servicing can make all the difference. One part that often raises questions is the sump plug washer. Does the 2020 Impreza use these washers? Are they important? Let's take a closer look.

For the 2020 Subaru Impreza, technical sources and official service documentation indicate that sump plug washers are indeed part of the oil drain plug assembly. This means the sump plug washer is quite relevant to the vehicle, playing an essential role during oil changes and in maintaining a tight seal on the sump plug to prevent oil leaks.

The sump plug washer, sometimes called a crush washer or sealing washer, is a simple but vital little component. It sits between the sump plug itself and the oil pan, creating a tight seal. This helps ensure that oil does not leak from the drain hole after an oil change. Subaru's engineering specifies the use of a washer to complement the plug's function, especially for vehicles like the Impreza where maintaining proper sealing is crucial for both engine health and environmental considerations.

Over time, the washer can become compressed, deformed or worn, meaning it might not seal as effectively if reused. This is why replacement of the sump plug washer is a common recommendation during servicing of the 2020 Impreza.

When servicing the 2020 Subaru Impreza, replacing the sump plug washer is a smart practice. Technicians typically remove the drain plug, discard the old washer, and fit a new one before reinstalling the plug. This ensures a clean, reliable seal that prevents leaks and keeps the engine oil safely contained. Ignoring the replacement of the washer could result in a loose seal, which in turn can lead to slow oil leaks and possible engine damage if unnoticed.

It's important to note that Subaru recommends specific sump plug washers made from materials suited to handle the compression and heat inside the engine bay. Most often, these washers are made from soft metals such as aluminium or copper, which deform slightly under pressure to create a secure seal.

If the sump plug washer is reused repeatedly, it may harden or no longer fit perfectly against the surface, increasing the risk of leaks. This is why Subaru's official guidelines and most service experts advise replacing the washer with every oil change on the 2020 Impreza. The cost of these washers is minimal, but the peace of mind gained by preventing oil leaks is a worthy tradeoff.

How often should the sump plug washer be replaced? Since Subaru recommends replacing the engine oil and oil filter typically around every 10,000 km or 12 months (whichever comes first) for the 2020 Impreza, it makes sense to replace the washer at these intervals too. Doing this avoids unnecessary wear and tear and helps maintain optimum engine condition.

Some DIY enthusiasts might be tempted to reuse the old washer to save a few dollars, but this is not advisable. The risk of leakage is greater, and over time oil leaks can cause bigger headaches such as engine damage or costly repairs. It is simply better to invest in a fresh washer each time the oil is changed.

Replacing the sump plug washer is a quick and easy task for mechanics and even for those comfortable with routine car maintenance. It involves removing the drain plug during an oil change, scraping off any old sealing material or grime, fitting a new washer, and tightening the plug to the correct torque specification outlined by Subaru. Over-tightening the drain plug can also cause damage, so having the right torque setting is essential for a perfect seal without harming the plug or sump.

To keep the 2020 Subaru Impreza running smoothly and to avoid any oil leaks, proper sump plug washer maintenance is a small but important step. Alongside regular oil and filter changes, using a new washer every time helps protect the engine and keeps your vehicle in tip-top shape for the road ahead.