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The valve seals in the head are bad.
If it smokes on startup, it has worn valve seals. If it smokes while running, it has worn piston rings (and perhaps worn valve seals, too.)
Remove the heater control valve and replace it.
Change the valve cover gasket.
The PCV valve on a 1998 Toyota Corolla is located on top of the engine, on the passenger side. It connects the intake manifold with the valve cover.
To change coolant on a Toyota Corolla, place a bucket under the radiator. Open the radiator drain valve and remove the radiator cap. When all antifreeze drains out, close the drain valve. Then refill with fresh antifreeze and replace the radiator cap.
The PCV valve on a 1987 Toyota Corolla FX16 is located behind the alternator. It is under the intake manifold.
what isa the valve adjustment of a 4A engine toyota corolla
yes
It does not have one
The 2005 Toyota Corolla has an inline 4 engine.
according to the emissions label it does not have an EGR valve.