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PSA: Be Safe With Brake Cleaner

If you work in a shop (and if you’re reading this, chances are you do), you are undoubtedly familiar with brake cleaner. And, if you know the scent of brake cleaner, you probably know that using it is not great for your health if it comes in contact with your skin,...

Compression Testing | ASE Practice Questions (VIDEO)

Description Technician A has just completed a dry compression test of a four-cylinder engine. All four cylinders are below specification by about the same amount. After performing a wet compression test, values remained unchanged. What could cause this condition? A)...

When a Voltmeter Isn’t Enough (Video)

Description With the variety of electronically controlled systems on a modern automobile, the days when a test light or simple voltmeter was enough to diagnose problems are long gone. Using a digital storage oscilloscope (DSO) can make troubleshooting faster and more...

P0420/P0430—The #1 DTC in the Country

DTCs (Diagnostic Trouble Codes) P0420 and P0430 are generic industry codes and part of the OBD-II standards. The descriptor labels the code(s) “Catalytic Converter Efficiency Below Threshold – Bank 1 (or 2)”. And the number one part sold to repair this problem is a...

Troubleshooting Fuel Trim–ASE Practice Questions (VIDEO)

Description Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says...

Add or Delete These Simple Parts to Help Customers Save Money

Looking for an easy way to win over your customers that they’ll enjoy every time they drive? Look at their vehicles from a hypermiler’s perspective. In case you haven’t heard the term before, the hypermiling community is obsessed with optimizing their vehicles’ fuel...

Piston rings – ASE practice questions (VIDEO)

Piston rings – ASE practice questions (VIDEO)

by | Jul 30, 2024

Piston rings – ASE practice questions (VIDEO) Description Which of the following statements about piston rings is incorrect? A) End gaps must be evenly spaced around the piston B) Rings are installed on the piston using a ring compressor C) Rings must be...
Engine knock – ASE practice questions (VIDEO)

Engine knock – ASE practice questions (VIDEO)

by | Jul 16, 2024

Engine knock – ASE practice questions (VIDEO) Description An engine exhibits a knocking noise. During a cylinder power balance test, the noise abates. Technician A says the noise is likely worn big-end bearings on the connecting rod. Technician B says the noise...
Oil leak – ASE practice questions (VIDEO)

Oil leak – ASE practice questions (VIDEO)

by | Jul 2, 2024

Oil leak – ASE practice questions (VIDEO) Description Which of the following is LEAST LIKELY to cause an oil leak?A) Torn valve cover gasket B) Worn wrist pin bushings C) Worn rear main seal D) Worn piston rings More ASE Practice Questions Oil leak – ASE...
Harmonic balancers – ASE practice questions (VIDEO)

Harmonic balancers – ASE practice questions (VIDEO)

by | Jun 18, 2024

Harmonic balancers – ASE practice questions (VIDEO) Description Technician A says a defective harmonic balancer can affect the accuracy of ignition timing readings. Technician B says a defective harmonic balancer can damage the crank. Who is correct? More ASE...
Separate gasket – ASE practice questions (VIDEO)

Separate gasket – ASE practice questions (VIDEO)

by | Jun 4, 2024

Separate gasket – ASE practice questions (VIDEO) Description Which of the following is LEAST LIKELY to require a separate gasket for installation?A) EGR valve B) Exhaust manifold C) Oxygen sensor D) Turbocharger More ASE Practice Questions Separate gasket...