On engines equipped with hydraulic tappets, zero lash at maximum tappet plunger rise can be determined by rotating the pushrod with your fingertips while slowly turning the lash adjusting nut. The ...

Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...

Dear Tom and Ray: My 2006 Honda Element has 108,000 miles. The dealer recommends a valve-clearance adjustment at this time. Is this a service you would recommend, or is it not necessary? Please ...

Adjusting overhead valves on heavy-duty ­diesels is a routine maintenance item subject to benign neglect in many of today’s fleets. The hardware that links the camshaft to the valves and some ...

With so many of our discussions lately revolving around the valvetrain, we thought you might like to finally learn how to get the best performance from yours. High-performance valvetrains can take ...

The hunt for efficient engine valve technology can be a never-ending journey into cam timing, various combustion cycles, and lift and duration adjustments. For that reason, some companies believe ...