Why Is My Crosstrek's Engine Making Strange Noises?

Hearing strange sounds from your Subaru Crosstrek’s Engine can be unsettling. One day it’s humming along like normal, and the next, you’re noticing knocking, whining, or ticking that wasn’t there before. It’s not always clear what these noises mean or how serious they are. But ignoring engine noises can lead to bigger, more expensive problems down the line.

Engines are pretty good at letting you know when something isn’t right. The key is figuring out whether the noise you’re hearing is harmless or a warning sign. It’s smart to pay attention to these sounds early, so you don’t risk damage to your Crosstrek’s engine or get caught in a breakdown when you least expect it. Let’s take a look at what some of those strange sounds could be trying to tell you.

Not all sounds from your engine are serious, but some definitely call for a closer look. The Subaru Crosstrek engine is known for its dependable performance, but just like any engine, it makes noise when something’s off. The good news is that many of those noises come from familiar problems that have clear causes.

Here are some common reasons your Crosstrek’s engine might be making strange sounds:

1. Engine Knocking or Pinging

This usually happens when fuel isn’t combusting the right way. The sound can come from using fuel with the wrong octane level or timing issues in the ignition system. It might sound like a ticking or tapping when you accelerate.

2. Worn Timing Belt or Chain

If your timing belt or chain starts to stretch or wear out, you could hear a rattling or slapping sound, especially during startup or idling. If it breaks, it can cause serious engine damage, so don’t wait too long to check it.

3. Exhaust System Problems

A leak in the exhaust manifold or damage to other parts of the exhaust system can create a hissing or popping sound. These issues can also affect how your car performs and may even cause a drop in fuel efficiency.

4. Low Oil or Poor Lubrication

A lack of oil can lead to metal-on-metal contact inside the engine. This often shows up as a loud ticking or knocking sound. An engine running without enough lubrication won’t last long.

5. Loose or Damaged Engine Components

Belts, pulleys, mounts, and other parts inside the engine bay can shift or wear out over time. When they do, they might start making whining, clunking, or rattling noises during certain speeds or while idling.

Any of these problems can create noticeable sounds if you know what to listen for. 

For example, one Crosstrek owner reported a ticking sound that got louder with engine speed. The culprit? A loose heat shield rubbing against the exhaust pipe. It sounded serious at first, but a quick inspection revealed a simple fix.

Knowing where the sound is coming from and what it might mean is your first step. Up next, we’ll break down some basic steps you can take to narrow down what’s going on and when it’s time to let a pro step in.

If your Crosstrek starts making sounds that aren't part of its usual rhythm, it’s time to zero in on where the noise is coming from. Some issues are easier to spot than others, but either way, your first job is to listen closely and pay attention to when and how the noise appears.

You can start simple. Pop the hood and let the engine run while you listen. Be cautious and don’t touch anything while it’s on. If the noise is ticking, knocking, or hissing near the top of the engine or along the exhaust area, that gives you a clue about what’s acting up. If the sound changes with engine speed, that’s another sign you’re dealing with a moving part like a belt or valve.

While you can use a mechanic’s stethoscope or even a long screwdriver (handle to your ear, tip on the engine component), this step should just be about identifying, not solving, the issue. Once you narrow it down, pass that information along to a professional. That makes their job easier, which can lead to quicker fixes.

It’s also good to keep an eye, or ear, out for warning signs like:

1. The check engine light turning on along with the new noise.

2. Smoke coming from the engine bay.

3. Grinding that increases when turning the wheel or accelerating.

4. Noticeable shaking during idle or while driving.

5. An unusual drop in fuel mileage or power.

If you spot any of these, don’t wait it out. Those can signal worsening damage or a safety risk. The sooner it’s checked, the less costly and risky it usually is.

Catching problems early is key, but preventing them before they start is even better. A few regular habits can go a long way in keeping your Subaru Crosstrek engine running quieter and longer.

1. Stick to your oil change schedule.

Your motor oil keeps engine parts from wearing down. Delaying oil changes gradually dries up that protection. Follow the recommended intervals to avoid long-term wear.

2. Use quality fuel.

It’s tempting to grab whatever’s cheapest, but some fuels burn cleaner and perform better in engines. Especially with turbo models, low-grade fuel can lead to knocking and deposits over time.

3. Additives, when recommended.

Some fuel system cleaners or oil additives can help reduce carbon buildup if used occasionally. But check your owner’s manual or ask a technician before adding anything.

4. Check your air filter.

Replace a dirty air filter on time. A clogged filter can cause strain and throw off your engine’s air-fuel mix, leading to rough sounds or reduced power.

5. Don’t skip inspections.

Even if there's no clear issue, a regular check from a qualified shop helps you stay ahead of problems. What feels like a minor sound today can snowball if ignored for months.

Taking a few easy steps can lower the likelihood of weird sounds and help catch issues before repairs cost more or lead to a breakdown.

It’s totally normal to feel unsure about whether to wait or call someone. But with engines, waiting too long can move a small issue into serious territory. If you hear a noise that you can’t explain or it doesn’t go away after a brief check, it’s a good time to let a trained Subaru tech take over.

Here’s when you shouldn’t wait:

1. The noise gets louder or happens more often.

2. The car drives differently or feels sluggish.

3. You smell burnt oil or fuel.

4. The engine shakes, misfires, or stalls.

5. Any dashboard lights appear at the same time.

Even if the sound seems minor, skipping a visit could mean costly damage to internal parts later. Experienced Subaru professionals know what these engines should sound like and where common problems start. You're buying peace of mind when you let them figure it out and fix it right the first time.

Strange engine noises aren’t something you want to ignore. Whether it’s a ticking that comes and goes or a loud rattle that starts every morning, your Crosstrek is trying to tell you something. Knowing the common causes helps you get one step ahead, especially when you catch the signs early.

Stay consistent with your maintenance. Pay attention to new sounds, changes in how the car drives, or anything out of the ordinary. It’s usually better to ask a professional what’s going on than to hope it goes away. With the right help and steady care, your Crosstrek will keep running strong and quiet for years to come.

For any parts or upgrades needed to bring your engine back to its smooth, reliable self, explore our collection at Subimods. Whether it’s to enhance performance or ensure the longevity of your ride, taking care of your Crosstrek now will lead to more miles of worry-free driving.

Keeping your Subaru Crosstrek's engine in peak condition helps avoid those unsettling noises. 

If you're looking for more options to improve your Subaru Crosstrek engine, check out a sample of dependable choices in the product gallery below to get started.