Underhood Automotive
Engine Build: 2.6 Smooth Bore 5.9L 12-Valve Cummins Engine

Tim Richardson decided to change his 12-valve 5.9L Cummins engine to fit the sanctioned 2.6 class pulling rules.

7 Reasons Direct-Injection High-Pressure Fuel Pumps Fail

High-pressure fuel pumps can malfunction and/or fail due to a number of factors.

Honda Oil System Inspection

The leading cause of low oil pressure-related complaints with Honda vehicles is the oil level.

Engine Build: Twin-Turbo 13B Mazda Rotary Engine

When it comes to engines, the Mazda rotary is an entirely different animal. Find out what went into this build.

Cavitation: Killer Of Water Pumps

The condition of the coolant has a direct relationship to cavitation in pumps.

Ford Clock Master Diagnostics

The clock master is the master module responsible for keeping time and broadcasting this information to the slave module(s).

Engine Build: Turbocharged Honda K24 Engine

At just 17 years old, Leo Greco has taught himself engine building techniques out of necessity.

Engine Build: Turbocharged 6.7L Cummins Swap

Mountain Machine owner Steve Ortner’s Cummins swap is everything he dreamed it would be and more.

Engine Build: Turbocharged 2.0L 4G63 Engine

iCraveBoost Performance specializes in 4G and 4B Mitsubishi engines, like the shop’s own turbocharged 2.0L 4G63.

Engine Build: Sleeved And Turbocharged 6.7L Cummins Engine

MB Diesel Performance had a customer come in looking to upgrade his 2009 Dodge 2500. Find out what went into the build.

Ford F-150: Lack Of Heat In Low Temperatures

This condition may be due to deposits from the engine coolant becoming trapped in the heater core.

Servicing Electronically Controlled Thermostats

When the heater circuit fails, most of the time it will create an open circuit.