Modern internal combustion engines — including those that run on diesel fuel — require a lot of special parts and systems to prevent dumping excess emissions into the atmosphere. Not only are those ...

Dear Tom and Ray: I drive a 1995 Ford Probe with roughly 138,000 miles on it. According to my mechanic, the rattlelike noise I hear as I drive is the result of valve tap. My mechanic indicated that it ...

EGR stands for exhaust gas recirculation, and the EGR valve is part of a system that does as the name implies: recirculate exhaust gas back into the engine’s intake manifold for a return trip to the ...

ABSTRACT Current heavy duty diesel valvetrains are not able to utilize hydraulic lash adjusters (HLA) in conjunction with an engine brake. During a braking event the engine brake introduces ...