Originally Posted by zski128
My 2001 did this after about 9 years, the very top of the oil fill tube would rust and expand locking the dipstick on. I was able to "twist" it off will a little pressure.
Yea, there was a big problem with the dipstick tubes, some would rust in half right at the fastener by the head.
What makes them hard to get out is a corrosion bubble inside tube flange at the top. In other words , -rust.
The way to get rid of that is to snake a greasy rag down inside the tube. then use a little grinding wheel followed up by a wire wheel to smooth it out. After that, pull the greasy rag back out, clean up the flange with paint prep or mineral spirits and paint w/touch up.
Greasing the o-ring is great idea, but sometimes it's not enough.