Hideaway headlight issue 1968 - Pontiac GTO Forum
User Tag List

  • 1 Post By wishihaditback
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 04-20-2017, 07:34 AM Thread Starter
Join Date: Jun 2011
Location: Northeast Oklahoma
Posts: 141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Hideaway headlight issue 1968

The hideaway headlight doors wouldn't stay open. I installed a new vacuum hose kit and put new seals in both old actuators. Both doors held for a few days, but now the passenger side slowly closes after shutting off the engine. Drivers side works and holds like a champ. Bought a new actuator from Ames and installed it. Same thing, door slowly closes. Then i read that a weak spring could be the cause. Sent the actuator back, put the old actuator back on, ordered a spring and just put it on. Door slowly closes. Before anyone indicates it might be hose leak, i've taken two 3" pieces of hose and blocked them off with a screw, manually closed the headlight door, and put the hoses on the ports and let go of the door. Door still slowly closes. I blocked off the ports with the tips of my fingers, same problem. I don't know what the internals are in the actuator but if there is some kind of diaphragm that is there and is bad, blocking off both inlet and outlet should still hold a vacuum. Only thing left i guess is to re-order the actuator i sent back and see if with the new spring it fixes the issue. I suppose the new seal isn't sealing well enough, or like was said in an old thread, a pin hole in the actuator body. But again i want to reiterate, it did the same thing with a new actuator and the old spring. Has anyone had an unsolvable issue like this? Thanks for any and all input.
wishihaditback is offline  
Sponsored Links
post #2 of 3 (permalink) Old 04-22-2017, 10:42 AM
1968gto421's Avatar
Join Date: Mar 2014
Location: Travelers Rest, South Carolina
Posts: 759
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 71 Post(s)
My '68 doesn't have them, thank goodness. If you're doing a concours restoration or into a "correct" restoration, I hope someone here will step up to the plate.

If you just want a functioning GTO, the GTOAA had an article in their The Legend magazine that showed how to convert these troublesome vacuum systems over the an electrical one using headlight door motors from a late 90's Camaro/Firebird. (I was in my 20's in '68 and remember those headlights were troublesome then, one open, one closed.) There is also a thread here on doing this conversion. Best of luck!

1968gto421 is online now  
post #3 of 3 (permalink) Old 04-22-2017, 12:11 PM Thread Starter
Join Date: Jun 2011
Location: Northeast Oklahoma
Posts: 141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Thanks for your input. In the intervening time i think i figured out the problem. It was the hose that goes to the bottom of the actuator, so the 3" hose with a screw wasn't reliable (or my fingertips!). A new length of hose appears to have solved the issue as the door is staying closed and not leaking off (fingers still crossed). So i figure i'm out almost $50 for a spring which i'm keeping and return shipping on the new actuator and shipping on the spring. Live and learn. Thanks again.
1968gto421 likes this.
wishihaditback is offline  
Sponsored Links

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

Quick Reply

Register Now

In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Another Hideaway Headlight Question Layzdude 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 09-29-2015 07:09 PM
Hideaway Headlight Doors Only? Perry 1964-1974 Tempest, Lemans & GTO Complete Exterior Body 2 10-10-2014 07:44 PM
Hideaway Headlight Actuators 68gtohawk8369 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 9 04-25-2011 07:42 AM
hideaway headlight question 1969gto 1964-1974 Tempest, Lemans & GTO General Discussion 17 12-20-2005 09:54 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome