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Looking for help with your vehicle? Do you see the dreaded check engine light on? have a problem with your car or truck and need a find a DIY guide? Our collection of How To articles can help you save money and time and get back on the road. No matter what issues in your vehicle you can find the how to tutorial to help you.
Whether you car problems are simple or complex, our guides are here to help. With just a digital multimeter at your side, you can test and diagnose most of your car issues with our How To articles. One of the other tools that is a must have when you want to fix a car yourself is the OBDII scan tool.
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Dial indicator measuring LS1 crankshaft end play at the crankshaft thrust bearing

LS1 Crankshaft End Play: What Is the Correct Thrust Clearance?

LS1 crankshaft end play should measure 0.0015–0.0078 inch. Learn where the No. 3 thrust bearing is located, how crankshaft end play is measured, and what to check during an LS1 engine build.
Dial indicator measuring LS1 piston-to-deck clearance with the piston at top dead center

LS1 Piston-to-Deck Clearance: How to Measure and Calculate It

LS1 piston-to-deck clearance is determined by **crankshaft stroke, connecting-rod length, piston compression distance, and block geometry**. Learn how these dimensions affect piston position at TDC and how to measure deck clearance during an LS1 build.
LS1 powdered-metal cracked-cap connecting rod showing the fractured cap mating surface

What Are LS1 Cracked-Cap Connecting Rods? How GM’s Fractured Rod Design Works

Factory LS1 connecting rods use a **powdered-metal cracked-cap design** with uniquely matched fracture surfaces. Learn why rod caps must stay with their original rods, how the design works, and what to inspect before reusing factory LS1 rods.
Acura RSX clutch interlock switch diagnostic showing the clutch pedal, starter-cut relay, ignition switch and starter circuit for a manual RSX that won't crank.

Why Won’t My Acura RSX Crank When I Press the Clutch?

A manual Acura RSX that has electrical power but won't crank may have a clutch interlock problem. Learn how the switch works and what to test next.
LS1 24x crankshaft reluctor compared with later 58x LS reluctor wheel

LS1 24x vs. 58x Reluctor Wheels: What You Need to Know Before Mixing LS...

Learn the key differences between LS1 24x and 58x reluctor wheels, including crankshaft compatibility, PCM requirements, sensor considerations, and what to verify before assembling or swapping an LS engine.
LS1 connecting rod big-end chamfer facing the crankshaft journal fillet during engine assembly

LS1 Connecting Rod Chamfer Orientation: Which Way Should the Rod Face?

Learn which way the **LS1 connecting-rod chamfer should face**, why it must clear the crankshaft journal fillet, and how correct rod orientation helps prevent clearance problems during LS1 engine assembly.

Common Engine Knock Causes

Engine knock or detonation is the leading cause of engine damage for most performance vehicles. It's an inconsistent and improper ignition of the mixture...
Volkswagen Mission Efficiency electric prototype demonstrating its aerodynamic 0.158-drag-coefficient body.

Volkswagen’s Mission Efficiency EV Sets a 0.158 Aerodynamic Record

Volkswagen’s Mission Efficiency prototype pairs a record-setting 0.158 drag coefficient with a modest 54.9-kWh battery and production-derived ID. Polo hardware.