Engine Archives - Page 3 of 209 - UnderhoodService
Cartridge Oil Filters

Mistakes made can result in costly comebacks.

How (And Why!) To Clean An Engine

Beauty is more than skin deep. Here are 11 steps to help clean any car’s engine compartment.

Spark Plug Fouling

Understanding why spark plugs get dirty.

Aging Plastic Intake Components May Cause Leaks

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

Diagnosing Intercooler Boost Trouble Code P0299

The criteria for setting the code is very basic.

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.

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.

What Caused The Turbo To fail?

Up to 50% of turbocharger failures are due to oiling problems.

Spark Plug Replacement

Here are some tips to follow when replacing a spark plug.

What Happened To Turbo Lag In Today’s Engines?

Yesterday’s turbo lag was eliminated thanks to years of development and a bit of clever engineering.

Understanding Engine Timing – Chains, Gears and Belts

Perfect timing is critical in the performance world, and now, it’s required by your regular customers too.

Five Spark Plug Service And Replacement Tips

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