The non-moving part of a valve. Water flow is stopped when the moveable portion of the valve comes in contact with the valve seat.
Surface against which a valve contacts. Usually, a valve at rest is against the inner seat, and a valve that is actuated is against the outer seat.
The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed.
Polyether ether ketone (PEEK) is a colourless organic polymer thermoplastic used in engineering applications.
a secret look
Look quickly, typically in a furtive manner
Protrude slightly so as to be just visible
glance: throw a glance at; take a brief look at; "She only glanced at the paper"; "I only peeked--I didn't see anything interesting"
1987 Volkswagen Jetta GLI
I've photographed this 1987 Jetta GLI, equipped with a sweet sixteen-valve four-cylinder engine rated at 123 horsepower, before. However, I noticed something different about this Jetta this time.
The wheel hub caps were back on! :-)
Then I peeked inside and found . . . Recaro seats! :-D
It became apparent that the owner of this GLI is bent on customizing and restoring the car to showroom condition.
Base price for a Jetta GLI sedan in 1987 was $11,690 versus $13,725 for the 16-valver.
With the advent of the five-door GTI hatchback in America, a GLI version of the next Jetta isn't likely. The car had been originally created as a counterpoint to the three-door GTI hatchback.
valve seats
More progress on the CL175 engine. I found +0.25 marked on the pistons, so someone has rebuilt this engine in the past.