2manyburbans
Junior Member
- Joined
- Sep 25, 2022
- Posts
- 14
- Reaction score
- 13
- Location
- Florida
- First Name
- Drew
- Truck Year
- 1985
- Truck Model
- K10 suburban silverado
- Engine Size
- 5.7 v8
Weird intake vacuum looking thingy maybe
- Thread starter 2manyburbans
- Start date
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Radiohead
That guy on the Columbia
- Joined
- Mar 17, 2022
- Posts
- 2,486
- Reaction score
- 8,110
- Location
- Low Earth Orbit where it's safer
- First Name
- Eric
- Truck Year
- MCMLXXIX
- Truck Model
- C-20 Silverado Camper Special
- Engine Size
- 454 crazy cubes, or 7.4 luscious litres
That's an emissions system thermal vacuum valve. A set of vacuum lines are attached that will switch duties depending on the temperature of the coolant.
Ricko1966
Full Access Member
- Joined
- Apr 11, 2017
- Posts
- 5,451
- Reaction score
- 8,695
- Location
- kansas
- First Name
- Rick
- Truck Year
- 1975
- Truck Model
- c20
- Engine Size
- 350
Don't throw it away or break it. It is a thermo vacuum switch, don't remember the function for sure,but can check tomorrow. I think that one is EFE and Vacuum Advance which are both good to have. That 4 port switch isn't cheap,if you ever need it in the future,you don't want to have to buy it.
Craig 85
Full Access Member
- Joined
- Jan 25, 2017
- Posts
- 3,917
- Reaction score
- 4,116
- Location
- Nashville, TN
- First Name
- Craig
- Truck Year
- 1985
- Truck Model
- K30 SRW
- Engine Size
- 454/TH-400/NP205
I have several different types of those on my '85 K30. Here's the vacuum map for my truck. It's a mess, but it all works.
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