Most likely cause is the cam cover gasket is leaking.
They seal oil/water/dirt out of the plug tube.
valve cover and spark plug tube gaskets. they come together in a kit
With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs. With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs. With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs.
Spark plug tube seals need changing
Replace the valve cover and plug tube gaskets.
replace valve cover gaskets & spark plug tube seals
If it is a 3.2 V6, it's the spark plug tube seals.
you can see if its leaking if you have the spark plug in tight and then fill up the spark plug tube with gas and see if it leaks out if it doesn't its still leaking from the top one
You buy a spark plug tube removal tool.. http://www.spendoo.com/1654-buy-pens/4889887-toyota-spark-plug-tube-remover-installer.htm
if the oil is at the spark plug base the valve cover gasket is leaking. if the spark plug electrode is covered with oil the engine needs rings
Failed seal under the valve cover on top of the plug tube.
No there should not be any oil where you plug your spark plugs into