When it comes to keeping your business on track, few things are as crucial as a reliable engine. For heavy-duty trucks, early detection of engine issues can mean the difference between a simple repair and a costly breakdown. Whether you’re hauling across Alberta or managing a regional fleet, recognizing the first signs of engine trouble can save both time and money—and protect your investment in a Peterbilt.

At Peterbilt Southern Alberta, our factory-certified technicians offer diagnostics and preventative maintenance tailored to the unique demands of the region’s trucking industry. 

Common Warning Signs of Engine Trouble

Understanding your truck’s normal performance is essential. When something changes—whether it’s a sound, a smell, or a dash light—it could be an early cry for help from your engine. Here’s what to watch for:

Unusual Noises

If your Peterbilt truck starts to make knocking, tapping, or grinding sounds under the hood, don’t dismiss it. These noises often signal problems with the combustion process, worn bearings, or a failing valvetrain. Continuing to operate the vehicle could lead to severe damage.

Excessive Exhaust Smoke

Different smoke colours can indicate different problems:

  • Black smoke usually points to too much fuel being burned.

  • Blue smoke indicates oil is leaking into the combustion chamber.

  • White smoke could mean coolant is entering the engine, often due to a blown head gasket.

Noticing a change in exhaust smoke? Schedule an inspection immediately.

Dashboard Warning Lights

Modern Peterbilt trucks are equipped with advanced diagnostics, and dashboard lights should never be ignored. The check engine light might be a vague alert, but it’s often tied to a deeper issue, from fuel system inefficiencies to sensor malfunctions. If the light is flashing, the problem is more severe and needs immediate attention.

Rough Idling or Stalling

If your truck hesitates, shakes while idling, or stalls frequently, this may signal issues with the fuel system, ignition components, or air intake. These symptoms often worsen with time and can affect your fuel efficiency and reliability on the road.

Loss of Power and Fuel Efficiency

A heavy-duty truck losing power during acceleration or climbing hills likely suffers from engine inefficiency. This can stem from clogged fuel injectors, a failing turbocharger, or compression loss. Along with a noticeable drop in power, your truck may burn more fuel than usual—a sign the engine is working harder than it should.

Increased Engine Temperature

An overheating engine is a serious red flag. This may be due to a failing radiator, water pump issues, or low coolant levels. If you spot your temperature gauge climbing or notice steam from under the hood, pull over and shut down the engine immediately. Continued operation could lead to engine failure.

To ensure your truck’s cooling system is operating effectively, have it inspected regularly—especially before summer hauls.

Vibrations or Shaking

Unusual vibrations, especially when accelerating or braking, may stem from engine misfires or transmission trouble. While this could also relate to the driveline or suspension, it’s worth investigating promptly to rule out deeper mechanical faults.

Fluid Leaks

Any fluid puddles under your truck after parking—oil, coolant, or fuel—are signs of trouble. An oil leak can cause engine wear, while coolant loss leads to overheating. Regular visual inspections of your parking area can help catch these issues early.

What to Do When You Suspect a Problem

If you notice any of the above symptoms, the next step is scheduling a diagnostic inspection. Ignoring early warning signs could lead to extended downtime, which means lost revenue. At Peterbilt Southern Alberta, our advanced diagnostic tools and certified technicians ensure your truck is serviced with precision and care.

With dealerships in Calgary, Lethbridge, Red Deer, and Medicine Hat, we make it convenient to get expert help when you need it most. Whether it’s a quick tune-up or in-depth engine repair, we’re equipped to handle your truck’s needs and get you back on the road quickly.

Don’t Wait—Protect Your Investment

Engine problems rarely go away on their own. Trust your instincts and address abnormalities right away. Timely diagnostics not only reduce repair costs but also extend your truck’s lifespan, boost performance, and maintain compliance with Canada’s emission standards.

To learn more about reducing emissions and staying compliant, check out our article on greenhouse gas regulations and their impact on Canada’s trucking industry.

At Peterbilt Southern Alberta, we’re committed to keeping your truck—and your business—running smoothly. Whether you’re facing engine concerns or considering a shift to alternative power sources like Peterbilt electric trucks, we have the knowledge and service you can trust.