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The PCV valve is located/inserts into the front valve cover(v6) and is connected to a rubber hose.
The exhaust valve gets hotter than the intake valve.
The valve springs.
it will cause pinging running your combustion hotter
This is a procedure done to restore the valves and valve seats. This is done typically when having a head(s) reconditioned.
pressure regulator valve gone bad . stem problem or seats in faucet
If it's got the original valve seats in it, I'd recommend using Lead Substitute in your gas. If you've got stellite valve seats, which by now you almost certainly do, unleaded is fine.
If it's a real old engine ( 1979 or older ) they do because the valve seats are soft not harden,and todays fuel will take the valve seats out of the heads. If you are going to use old heads with todays gas they will have to have hardened seats put in the heads.
because ur heads need inserts..2500 dollar job
None is needed. The car came from VW with hardened valve seats, and by now this specimen has had the heads changed--and all aftermarket heads have unleaded valve seats.
on the top of the motor on the passenger side there will be a hose that inserts into the side it pulls out really easy. remove old vale and replace with new and reinsert into valve cover
Some heads have replaceable guides and you just drive them out with the head off. Others need to be machined to have inserts installed.