Oil filler cap came loose for 2nd time.

[frey]

First time was after a 1200 mile trip to Florida. Trace oil on hood, cap laying in engine compartment. Didn't see it at first; VW for a replacement. Happened again last night. Cap gone for good this time but had the new cap on hand. Hard to believe this could happen. 2015 GSW

 

[ticaf]

Hard to believe indeed. Are you sure nothing is broken? Send a few pics over so people can comment.

 

[frey]

Cleaned the underside of the hood this morning. Oil all over of course. Checked the filler cap again. It seems to seat alright. with a quiet little click, I suppose the old cap that's popped off twice could have been defective and I'll have no more problems but have to say a child of 4 could twist that cap off. Takes little pressure. With that massive vacuum leak wouldn't I be seeing an engine code? And the engine ran normally. I would send pics but there's nothing to see. Just a cap that should take a little more torque to remove.

 

[s_ribs]

When I changed the oil last year I noticed the fill cap went on a bit too easy. Picked up a new cap and verified the old caps rubber gasket was meaningfully compressed. I was surprised but at least a new cap solved things.

Ironically, my fuel cap seems to come on/off a bit too easy lately as well...

 

[Cuzoe]

I recently noticed some wetness around my oil fill cap. I popped the cap off, which felt normal, and I didn't think anything looked weird. Cleaned it up and put the cap back on, which also felt normal. But I will be ordering a new cap and comparing the gasket for sure.