Any Chevy engine, if it's well-modified or just slightly warmed-over, requires a good set of valve seals. Originally, a small rubber O-ring, fitted in the second valve stem groove, served as the only ...

If the cylinder heads are on the engine, you will need to add air pressure to the cylinder to hold the valves in place. Our example is the Craftsman 47089 compression test kit using the 14mm long ...

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace the ...

Less leakage results in reduced product loss, increased efficiency, and improved energy management. Figure 1. This control valve is subjected to EPA’s Method 21 “sniff ” test to determine the fugitive ...