Valve cover gasket required replacement when automakers were
more concerned with their costs than the owner's problems.
Today, a valve cover gasket is a neoprene type material that
makes leaks and replacement irrelevant. Valve cover cannot be
attached backwards or incorrectly. Once those four valve
cover nuts are tightened, then valve cover is sealed and
restored - without a new gasket.

Usually removing a cover (after nuts are removed) requires
some gentle prying. Start by separating cover from plastic
timing chain cover - the semicircular round part of valve
cover on your right (left side of car). Valve cover will then
simply peal off the engine. Best not to pry between aluminum
engine and valve cover so as to not dimple the engine's
aluminum.

A hole in wheel well permits turning engine crank shaft - to
rotate pistons and valve cam. Breaker bar (or rachetted
socket wrench) is simply a long shaft that attaches to a 19 mm
socket via a 3 or 4 inch extension. I use a 1/2" drive
socket, extension, and wrench; but 3/8" may also work. (Then
with a 17 mm socket and that breaker bar, I also have a better
wrench, if necessary, to replace a flat tire.)

Forgot to mention that engine must be out of gear (or in
park) so that 19 mm socket can freely rotate engine
crankshaft. This 19 mm socket simply attaches to a bolt at
end of engine crankshaft. Third party maintenance manual
would have pictures of this bolt and pulley wheel (timing
chain pulley wheel connects timing chain from cam to
crankshaft). Turn front wheels fully to left and view that
access hole.

amsjsj wrote:
> Well i foudn some tools, i got the feeler gauge i was reading and
> i have the concept of adjusting the valves. What confuses me is
> the trurning of the cam shaft. What is a breaker bar? Also do i
> have to replace the gasket?