Bojan Popic

Mechanical Engineer & Automotive Technician

bojan popic

Hi, I’m Bojan Popic, and I’m a mechanical engineer and long-time automotive technician who creates and edits much of the visual and written content on Mechanic Base. My engineering background helps explain complex vehicle systems in a simple, step-by-step way that anyone can follow.

I have more than 10 years of experience in diagnostics, maintenance, and component testing. I focus on turning technical information into clear, practical guides that help readers understand how their cars actually work.

At Mechanic Base, I produce detailed repair videos and collaborate on article editing to keep every post accurate, up to date, and easy to understand.

Expertise and Certifications

  • Mechanical Engineer (B.Sc.)
  • Over ten years of practical automotive repair experience
  • Diagnostic process design and testing
  • Video production and technical editing

Areas of Focus

  • Educational repair videos
  • Vehicle system diagnostics
  • Step-by-step maintenance procedures
  • Editing and accuracy review of technical content

Follow Me

Watch my diagnostic walkthroughs on the Mechanic Base YouTube channel or explore his latest repair tutorials here on the site.

My Latest Videos

🚗If you want your engine to last 200,000+ miles, you need to avoid these 5 common mistakes that destroy engines every day. In this video, I break down the most common engine-killing habits I see in the shop and explain exactly why they cause serious damage — plus what you should be doing instead. We cover: 00:01 Intro 00:40 Driving Hard with Cold Engine 02:15 Not Cooling Down the Engine 03:40 Overheating the Engine 05:20 Not Changing the Oil Frequently Enough 06:55 Using Low Quality Fuel ✅If you found this helpful, make sure to like, subscribe, and check out the channel for more in-depth mechanical tutorials, diagnostics, and maintenance guides. #EngineMaintenance #CarCare #TurboCars #OilChange #CarTips #MechanicAdvice
5 Things That Will Destroy Your Engine (Avoid These Costly Mistakes!)
If your tubocharged car feels sluggish and low on power, you might be looking at a boost issue. In this video, you'll learn what the common causes of NO BOOST or LOW BOOST are, how to diagnose the problem and how much it might cost to repair it. ✅00:01 - Intro ✅00:45 - Low Boost common causes ✅00:55 - Cracked intercooler hoses ✅01:30 - Dirty MAF sensor ✅02:10 - Dirty MAP sensor ✅02:35 - Wastegate issues ✅03:05 - Clogged Turbocharger ✅03:50 - How to diagnose the No Boost condition? ✅06:25 - Repair cost 🚗 Applies to most turbocharged cars and trucks (gasoline & diesel) 🔧 Perfect for DIYers, enthusiasts, and anyone dealing with turbo power loss. #LowBoost #TurboFailure #BoostLeak #TurboDiagnostics
NO Boost or LOW Boost | 5 Common Reasons why your turbocharged car might be down on power
Discover the 5 most common symptoms of a bad oxygen sensor and learn how much oxygen sensor replacement really costs. A failing O2 sensor can cause poor fuel economy, rough idle, check engine light, engine hesitation, and failed emissions tests. In this video, we explain how to spot the warning signs early and avoid expensive engine or catalytic converter damage. Whether your check engine light is on or your car is running rich or lean, this guide will help you understand what an oxygen sensor does, why it fails, and when it needs to be replaced. ✅ In this video you’ll learn: 00:00 Introduction 00:56 Oxygen Sensor Function 02:05 Bad Oxygen Sensor Symptoms 02:15 1. Check Engine Light 03:22 2. Poor Fuel Economy 03:53 3. Black Smoke From Exhaust 04:21 4. Engine Running Issues 05:01 5. Failed Emission Test 05:35 Causes of Oxygen Sensor Failure 08:05 How to Fix 🚗 Applies to most cars, trucks, and SUVs (gasoline engines) 🔧 Ideal for DIYers and everyday drivers looking to save money on car repairs. Common searches related to this topic include: Bad oxygen sensor symptoms Symptoms of a bad oxygen sensor Oxygen sensor symptoms O2 sensor symptoms Faulty oxygen sensor How to tell if an oxygen sensor is bad Oxygen sensor failure Downstream oxygen sensor symptoms Upstream oxygen sensor symptoms Black smoke oxygen sensor Poor fuel economy oxygen sensor Check engine light O2 sensor Rich or lean mixture O2 sensor Oxygen sensor replacement cost O2 sensor replacement cost How to fix a bad oxygen sensor Oxygen sensor diagnosis P0130 P0133 P0135
5 Signs of a BAD Oxygen Sensor (& Replacement Cost)
Experiencing rough idle, engine rattling, loss of power, or a check engine light? These are common bad cam phaser symptoms you should never ignore. In this video, we explain how cam phasers work, the most common warning signs of failure, what causes cam phasers to go bad, and how much cam phaser repair or replacement can cost. Ignoring these symptoms can lead to serious engine damage. What you'll learn👇 📌00:01 – Intro 📌00:35 – Bad Cam Phaser symtoms 📌03:35 – What Cam Phasers (VVT) do? 📌05:05 – How to diagnose a bad VVT valve or solenoid? 📌07:25 – Repair cost #CamPhaserFailure #VVT #RoughIdle #MechanicAdvice #AutoRepairTips
6 Symptoms of a Bad Cam Phaser
⚠️10 BAD Driving Habits that DESTROY Your Car⚠️ #carrepair #drivingtips #carhacks #mechanicsecrets
Learn how to reset blend doors in your vehicle and fix common HVAC problems like no heat, no cold air, air blowing from the wrong vents, or clicking noises behind the dashboard. In this video, we walk you step-by-step through blend door reset procedures that work for many cars, trucks, and SUVs—no special tools required. A blend door reset can often solve climate control issues caused by battery replacement, dead battery, or HVAC calibration errors, saving you time and expensive repair bills. In this video, you’ll learn: ✅What a blend door actuator does ✅Signs of a misaligned or stuck blend door ✅Step-by-step blend door reset procedure ✅When a reset works vs. when replacement is needed ✅Common HVAC mistakes to avoid 🚗 Works for many makes and models (Chevy, Ford, Dodge, Toyota, Honda, and more) 🔧 Perfect for DIYers, beginners, and anyone experiencing HVAC temperature problems.
Blend Door Actuator Reset – 5 ways to fix car heating
Is your car making strange noises? Squealing, knocking, grinding, rattling, or whining sounds can be early warning signs of serious (and expensive) problems. In this video, we break down the 10 most common car noises, what causes them, and what they mean for your vehicle. Knowing these sounds can help you: ✅ Avoid costly repairs ✅ Catch problems early ✅ Stay safe on the road ✅ Understand when to visit a mechanic 🎧 In this video, you’ll learn about: Squealing noises when braking Knocking or ticking sounds from the engine Grinding noises while driving or shifting gears Rattling sounds from suspension or exhaust Whining or humming at different speeds Clicking noises when turning And more common car sounds explained in simple terms Whether you drive a petrol, diesel, or turbocharged car, these noises apply to most modern vehicles. 👇 Watch till the end to learn which car noises are the most dangerous and which ones you should fix immediately! 🔔 Don’t forget to LIKE, COMMENT, and SUBSCRIBE for more car tips, common driving mistakes, and expensive car failures explained.
10 Most Common Car Noises
Is your car hesitating, idling rough, or showing a check engine light? The throttle position sensor (TPS) could be out of calibration. In this video, I’ll show you 5 proven ways to reset the throttle position sensor and restore proper throttle response. A faulty or misaligned TPS can cause poor acceleration, rough idle, stalling, and bad fuel economy. Before replacing the sensor, try these simple reset methods that work on many Ford, Chevy, Toyota, Honda, Nissan, and Dodge vehicles. 🔧 What you’ll learn in this video: 00:00 Intro 00:30 What the throttle position sensor does 01:20 Common symptoms of a bad TPS 02:30 Method 1 – Battery disconnect reset 03:30 Method 2 – Accelerator pedal relearn 04:45 Method 3 – Ignition key relearn 06:00 Method 4 – Scan tool reset 07:20 Method 5 – ECU relearn procedure 08:30 When to replace the TPS 👉 Resetting the throttle position sensor can often fix hesitation, throttle lag, and idle problems without expensive repairs. #ThrottlePositionSensor #TPSReset #CarRepair #CheckEngineLight #CarMaintenance
Throttle Position Sensor (TPS) Reset – 5 Methods That Actually Work
These 12 bad driving habits are slowly destroying your car — and most drivers don’t even realize they’re doing them. In this video, I break down the most common habits that cause expensive repairs, engine damage, and unnecessary wear on your vehicle. If you want your car to last longer, run smoother, and avoid costly trips to the mechanic, this guide is for you. You’ll learn: 🚫 Habits that ruin your engine 🚫 Mistakes that damage your transmission 🚫 What kills your brakes and suspension 🚫 Daily driving habits that wear out the turbo 🚫 How idling harms your engine 🚫 Things you should never do when the engine is cold 🚫 Gas-saving myths that actually damage your car Most of these habits affect everyday cars like Toyota, Honda, Ford, Chevy, Nissan, Jeep, and Hyundai — and fixing them can save you hundreds or even thousands in repairs. #BadDrivingHabits #CarMaintenance #CarTips
12 BAD Habbits that DESTROY Your Car
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