Recent service found oil in my #4 Sparkplug hole. Due to the fact there is no oil retention ring, ie a O-ring to seal. The Toyota dealership looked for every possible option only to find no explanation besides an improper fitment or a bad cylinder head.
As they try to thumb through the delicate pages of the warranty to find a solution. I figured I ask here before i'm stuck in between a rock and hard place.
So has anyone heard or had this problem?
It's a 2002 Ext Cab Prerunner Six cyl. 92,000miles