It's arguable that the valve job is the most important element to a well-flowing head, as the cut of the valve face and seat together determine the shape airflow will ultimately take past the valve.

Valve 3 is a 45-degree angle with a 30-degree back cut, while valve 4 is a 30-degree seat angle with a very shallow, 22-degree back cut.

See how precise valve seat replacement enhances durability, performance, and fuel efficiency. With cutting-edge techniques and expert craftsmanship, this process guarantees an engine that runs ...

Since exhaust valves operate at extreme temperatures, they require a wider seat to conduct heat away from the valve through the seat.

Valve seats can leak for many reasons whether it is the seating surfaces not mating correctly, the packing or gaskets deteriorating or incorrect loading of the seals and fasteners just to name a few.

WHEN refacing the valve seats of an automobile engine, it is usually the practice to make a reamer out of cast steel and temper and grind it to she. This is rather a tedious task and somewhat ...

But aside from sealing, poppet valves don’t offer many advantages. Still, engineers kept pushing: better springs, VVT, and all kinds of breathing tricks: variable intake manifolds, forced induction, ...

The variable-orifice MBV (VOMBV) measures the pressure drop across the throttling valve. As the VOMBV-style balancing valve is throttled, the flow is determined by measuring the pressure drop across ...

BURSCHEID, Germany, Aug. 10, 2017 /PRNewswire/ -- Federal-Mogul Powertrain will debut new materials for valve seats and guides with improved thermal conductivity at the 2017 IAA Show in Frankfurt ...

If your car’s valve seats haven’t been replaced yet, when they do wear out, you’ll replace them with hardened seats, and then there’ll be nothing to worry about.

GM's L92 V8 is built to last, but a teardown reveals a recurring flaw that can turn this tough engine into scrap metal.

These additives help prevent valve seat recession, especially important if you drive your classic regularly. Without it, long-term use of unleaded gas could eventually lead to valve damage.