Engine Building

Learn how the GM Ecotec timing chain tensioner maintains proper chain tension, reduces timing chain noise, compensates for chain wear, and keeps valve timing accurate. This guide explains the factory...

Complete GM Ecotec timing chain tensioner guide covering timing chain rattle, noise, chain slap, reset and replacement decisions, updated OEM hydraulic tensioners, and BK Racing Manual Timing Chain Tensioner upgrades....

Just because your Ecotec can turn 8,000 RPM doesn’t mean it’s making power there. Valve float, valve bounce, weak valve springs, and hydraulic lash adjuster instability can quietly rob horsepower...

LE5 Engine Overview: Features and Performance The LE5 Ecotec engine is a 2.4-liter inline-four (I4) gasoline engine from General Motors' Ecotec family (also known as the L850 family). It is...