EGR Valve
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Last edited by Paul L; Oct 31, 2013 at 09:29 PM.
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Here is a sad picture of my '75 before owned it. You can see the correct hook-ups of the vacuum lines to the EGR and EFE TVS (the previous owner snapped a nipple of the EFE TVS and thought he could get away with a vacuum plug on the EFE actuator?).
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6
Right! So for 1978, the TVS on the thermostat housing is for the EFE actuator that is connected to your passenger side manifold. Your EGR TVS is mounted in a port on the manifold (which you've shown above).
I'm guessing you have an L-48? Check out Doc Rebuild's page, you can zoom in on his kit and see the correct ports for a quadrajet.
http://shop.docrebuild.com/1978Corve...eplacesGM.aspx
I'm guessing you have an L-48? Check out Doc Rebuild's page, you can zoom in on his kit and see the correct ports for a quadrajet.
http://shop.docrebuild.com/1978Corve...eplacesGM.aspx
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
EDIT: I see Zip is currently out of stock. Check out Paragon.
https://www.paragoncorvette.com/p-36...vs-switch.aspx
Last edited by LeMans Pete; Nov 1, 2013 at 06:25 AM.
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Team Owner
Joined: Aug 1999
Posts: 30,995
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From: Ontario
2026 Loser of the Year
Joined: Sep 2013
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From: New Or-leens Loo-z-anna
A "little" coolant to some of us might be a lot to other members....(to me---anything less than a quart is a little....LOL!)
Just in case, I would have the new switch ready and reachable/a cloth ready to absorb any spilled coolant on the engine....then unscrew the old switch...have a thumb ready (on a COLD engine) to press over the threaded hole until you can stick the new threaded switch into place and tighten it making sure the vacuum ports are pointed in the correct direction.
Just in case, I would have the new switch ready and reachable/a cloth ready to absorb any spilled coolant on the engine....then unscrew the old switch...have a thumb ready (on a COLD engine) to press over the threaded hole until you can stick the new threaded switch into place and tighten it making sure the vacuum ports are pointed in the correct direction.
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6
A "little" coolant to some of us might be a lot to other members....(to me---anything less than a quart is a little....LOL!)
Just in case, I would have the new switch ready and reachable/a cloth ready to absorb any spilled coolant on the engine....then unscrew the old switch...have a thumb ready (on a COLD engine) to press over the threaded hole until you can stick the new threaded switch into place and tighten it making sure the vacuum ports are pointed in the correct direction.
Just in case, I would have the new switch ready and reachable/a cloth ready to absorb any spilled coolant on the engine....then unscrew the old switch...have a thumb ready (on a COLD engine) to press over the threaded hole until you can stick the new threaded switch into place and tighten it making sure the vacuum ports are pointed in the correct direction.
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6
I haven't been having any luck finding this,, seems to have been discontinued or very hard to get... Would it run ok if the egr was connected to the vac. port that the tvs is connected to ? Or better not to run the egr at all ? Thanks
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Thread Starter
Racer
Joined: Jul 2013
Posts: 423
Likes: 6