It depends on the engine size, number of valves in the head, and difficulty of head removal. Typical repair procedure is to remove the head, replace all the valves and valve seals. This ensures the best and most dependable repair. I would guess it will run you anywhere between $600.00-$750.00 for a basic 4 cylinder engine; higher performance 4 cylinder engines will cost more. V-6 & V-8 engines usally run higher because they have 2 heads and both need to be done. Ballpark figure $600.00-$1000.00 or more.
the signs of a valve cover leak are oil on the engine oil is the only thing that can leak from a leaky valve cover
Yes. It can be replaced.
Yes, a bicuspid aortic valve can be repaired if it is diseased. The procedure usually involves a small incision and the valve will either be repaired, or more often, replaced with a synthetic valve.
An incompetent valve allows backflow of blood.
An interferance engine is typically described as an engine with a valve assembly where, the lowest point of any valve's extension into the cylinder, is lower than the highest point the piston will reach. If valve timings are altered incorrectly or a valve spring breaks, the valve and piston can collide, causing massive damage to the engine.
Not to it's best ability
high miles, thin oil, bad valve guides, worn piston rings, leaky head gasket, and/ or a leaky PCV valve.
You have to pull the heads so the seat can be resurfaced and valves only come out from bottom most engines.
leaky valve seals
I'm alive. so far
Among other things, an infection.
In aortic valve insufficiency, the aortic valve becomes leaky, causing blood to flow backwards into the left ventricle.