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Under the valve cover there are seals on top of the plug tubes, you will need to replace the valve cover gasket and plug tube seals.
No the valve seals are between the cam and the head, under the valve spring
Below the throttle body.
you may need to replace your gaskets on your valve covers and such, the gaskets are vital to engine pressure
It is normal to replace them.It is normal to replace them.
Yes, you remove the rockers, add air pressure in the cylinder through the plug hole and use a valve spring compressor to remove valve spring. You can now change the valve seal.
How do you replace valve stems and guides on a 1989 Jeep 4 Cylinder engine?
No, oil treatment will react in the same way as regular oil. Replace the valve seals.
A 1999 Dodge Ram does not have a water control valve.
The head, or top part of the motor, must be removed to replace valve seals. After the head is removed take it to a machine shop and they will mill the head to make sure it is flat and also grind down the valves and replace the valve seals.
Replace if failed.
IF YOU MEAN THE OIL IS DOWN IN THE SPARK PLUG TUBE. THERE IS A SEAL THAT IS IN THE VALVE COVER THAT GOES AROUND THE TOP OF THE SPARK PLUG TUBE, THEY GET HARD AND START TO LEAK INTO THE TUBES AFTER A WHILE. YOU WILL HAVE TO REMOVE THE VALVE COVER TO REPLACE THEM.