01 January 2023 Archives - UnderhoodService
Solving Intermittent Overheating

New cooling systems anticipate and influence changes in coolant temperature.

Spark Plug Fouling

Understanding why spark plugs get dirty.

PCV System DTC

PCV systems are far more complex now, but they are also much better at controlling crankcase pressure.

The January Digital Edition Is Available To Download, Read

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