The purpose of your engine is to compress fuel and air and then ignite it, creating heat energy that then makes mechanical motion. If your engine can't compress the air and fuel properly, the engine ...

A customer reported that his excavator was down on power and his sense was that the issue was likely the hydraulic pumps. He asked for a price to replace them. “Of course,” I said, “but would you like ...

A four-stroke (or four-cycle) engine is so called because in the process of producing power, the piston passes up and down the bore four times. These strokes or events are the induction, compression, ...

Motor Trend Magazine's June 2006 Technologue column introduces two pretty neat alternative hybrid schemes. Inquiring minds are bound to have questions about how each works, so here's a series of Q&A ...

Despite the turbulence Nissan has faced over the past few years, some of its technology is undeniably impressive. Perhaps the crowning jewel of this engineering power is its variable compression ...

SAE International Journal of Engines, Vol. 2, No. 1 (2009), pp. 1574-1586 (13 pages) ABSTRACT The objective of this study was to examine the operating characteristics of a light duty multi cylinder ...

A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. Healthy engines should have compression over 100 psi per ...