I need some help from the vacuum headlight experts- I got this quirkey headlight that has a history of popping open after the car is shut off but closes when you crank it up. This use to happen once every couple of months , but now it is happening alot. Anyone expierence the same problem??? Any help would be appreciated! THANKS!!!

Macguyver, here are two links i always found helpful.. Sounds like your Vacuum or the actuator isnt working.. Maybe a slow vacuum leak at first but it's getting worse ?

Lenghty explanation of the Vaccum thingy.
http://vetteworks.tripod.com/techdocuments/Vaccum.html

and the missing diagram for that page..
http://home.comcast.net/~chadwick.rober ... iagram.jpg

And more info from my 'other' home, they are talking in lenght about the actuators, boots, hoses etc..
http://www.corvetteactioncenter.com/for ... ght+vacuum

Let me know if i can trace anything on mine for you.

:wave
-Stefan

It may be the vacuum relay on that side your having the problem with.The headlight can't open unless vacuum is applied to to one side of the actuator.The vacuum is probably being supplied from the vacuum canister because ther is no other source when the engine is not running.The relay works when the engine is running but is supposed to return to it's normal position{internal}by a spring when you shut the engine off. Try switching the vacuum hoses on the relays to the opposite sides and see if the problem moves to the other headlight,if it does you have a bad vacuum relay.I do not know if the actuators themselves are spring loaded and can cause this problem,but I think not, since they have hoses on either side to open and close. Let us know how you make out.
Jules

FIXED IT!!!! Finally got around to working on this thing, gets embarassing after a while when 1 headlight keeps popping up like that. It ended up being that little round metal check valve up by the drivers side top of the intake. Super simple easy and cheap!!!!

Previous post was mine--- not logged on