Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

vacuum switch install

Discussion in 'The Garage' started by Big GMC truck, Jan 2, 2006.

  1. Big GMC truck

    Big GMC truck Registered Member

    Joined:
    Aug 23, 2005
    Posts:
    73
    Likes Received:
    0
    Location:
    California
    I'm replacing a vacuum switch that is located on my water outlet. Will coolant come out when I take out the switch? Do I have to drain the coolant? Do I have to put anything on the threads of the switch? Thanks
     
  2. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    Coolant will come out. I first coat the threads of the new sensor with Permatex Form-a-gasket and then just thread it in quickly after removing the old one. If you do it right, you'll only lose a few ounces of coolant. :)
     
  3. JSH

    JSH Registered Member

    Joined:
    Oct 20, 2002
    Posts:
    75
    Likes Received:
    0
    Location:
    Iowa
    If you are talking about the thermal vacuum switch on the top of the thermostat housing, should only lose a couple of drops of coolant. I used teflon tape on my threads-not sure what GM recommends but didn't seem to leak afterwards.
     

Share This Page