Magazine Archives - Page 3 of 69 - UnderhoodService
Aging Plastic Intake Components May Cause Leaks

BMW valve covers and intake manifolds made of plastic are susceptible to warpage and gasket failure.

Misfire Codes P0300, P0301-P0312 and P0313+P0314

The only way to clear the code is to use a crankshaft position relearn with a scan tool.

Curing Intermittent And Chronic Fuel Pump Failures

The fuel pump may be one of the most misdiagnosed components on a vehicle.

Belt-In-Oil Timing Systems

Oil contamination of the belt drive has been a death sentence, due to the rubber and fiber construction of the belt.

The January Digital Edition Is Available To Download, Read

Each issue includes technical content from Underhood Service and other ShopOwner channels.

Do Oxygen Sensors Generate Electricity?

They are made of zirconium oxide, a chemical compound used to form the sensor’s thermal-driven electrochemical fuel cell.

Five Spark Plug Service And Replacement Tips

Most articles will tell you to use a torque wrench, but they never explain why.

Air Conditioning Components

When a compressor fails the question for most technicians is whether to flush the condenser or replace it.

Fuel Tank Contamination

A number of things can cause a fuel filter to plug up.

Improving Turbocharger Longevity

It is estimated that by 2022, 50% or more of vehicles sold in the U.S. will have one or more turbochargers under the hood.

EGR, Secondary Air Injection And Emissions Management

EGR systems put a small amount of inert gas into the combustion chamber to control the temperatures.

Mini Cooper Water Pump Service

The water pump is turned by a metal wheel driven by the crankshaft pulley.