ASE A1 Engine Repair — study guide and practice test
A1 covers diagnosing and repairing the engine itself: leaks and noises, the cylinder head and valvetrain, the block, lubrication and cooling, and the fuel, electrical, ignition and exhaust systems around it. ASEMaster A1 walks through each area in study panels, quizzes you as you go, and ends with an 80-question practice test that explains every answer.
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What's inside A1
- 38 study panels you can read in short sittings
- 114 panel quiz questions — a few questions right after each panel
- 50 area quiz questions — a quiz at the end of each area
- An 80-question practice test — graded when you submit, with a written explanation for every question (80 of 80 have one)
The 5 areas and every panel in them
1. General Engine Diagnosis
- 1.1 — Introduction
- 1.2 — Engine Leaks
- 1.3 — Engine Noises
- 1.4 — Excessive Oil Consumption & Exhaust Smoke
- 1.5 — Engine Vacuum Tests
- 1.6 — Cylinder Power Balance Test
- 1.7 — Compression Test
- 1.8 — Cylinder Leakage Test
2. Cylinder Head and Valvetrain Diagnosis and Repair
- 2.1 — Cylinder Head Removal
- 2.2 — Disassembly
- 2.3 — Cleaning
- 2.4.1 — Inspection: Cylinder Head & Warpage
- 2.4.2 — Inspection: Valves & Valve Guides
- 2.4.3 — Inspection: Valve Springs & Components
- 2.5 — Repair
- 2.6 — Assembly
- 2.7.1 — Camshaft & Valvetrain
- 2.7.2 — Timing Belt, Chain & Gears
- 2.7.3 — Lifters & Valvetrain Service
- 2.8 — Cylinder Head Installation
3. Engine Block Diagnosis and Repair
- 3.1 — Engine Disassembly
- 3.2 — Cleaning
- 3.3 — Inspection
- 3.4 — Cylinder Honing
- 3.5.1 — Assembly: Preparation & Camshaft Bearings
- 3.5.2 — Assembly: Crankshaft & Pistons
- 3.5.3 — Assembly: Timing, Gaskets & Balancer
- 3.6 — Flywheel Checks
4. Lubrication and Cooling Systems Diagnosis and Repair
- 4.1 — Lubrication System
- 4.2.1 — Cooling System & Pressure Testing
- 4.2.2 — Belts, Thermostat, Pump & Radiator
5. Fuel, Electrical, Ignition and Exhaust Systems Inspection and Service
- 5.1 — Fuel and Air Induction System
- 5.2 — Positive Crankcase Ventilation
- 5.3 — Turbochargers and Superchargers
- 5.4 — Exhaust System
- 5.5 — Battery
- 5.6 — Starter
- 5.7 — Ignition System
How the free trial works
- Register with a username, your email and a password.
- Click the link in the verification email we send you.
- You get 30 days of full access to all eight ASE courses (A1–A8). After that you can choose a plan if you want to keep going.
No credit card is needed to start.
What this is — and isn't
ASEMaster is independent ASE test prep. It is not affiliated with or endorsed by ASE. We can't promise you'll pass an exam, and we don't publish pass rates because we don't have verified ones.
Questions
Do I need a credit card?
No. The trial needs a verified email address, not a card.
How is the practice test scored?
You answer all 80 questions and submit. You get your score right away, plus a written explanation for each question.
Can I use it on my phone?
Yes. It works in a mobile browser, and you can add it to your home screen.
Is ASEMaster affiliated with ASE?
No. We are independent.