What are these vacuum parts? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mudflapp · 07-11-2015, 01:00 PM

Hello everyone! My name is TJ/ mudflapp, I have a 1983 c10 with a SB 350. Im installing a new manifold this weekend, Im trying to eliminate some vacuum lines in the process to clean it up a bit. There's a couple vacuum lines that I don't know what they are going into/what they even are . I took some pictures for you guys maybe you can tell me what they are, and if they can be eliminated? IN the fourth picture (with the red circle) that is right under the header manifold maybe even looks like its attached?? no idea let me know guys!!

Thanks: TJ, aka mudflap

tucsonjwt · 07-11-2015, 01:41 PM

Top two pics are cruise control server and linkage. Can't make out second pic. Third pic looks like vacuum valve for emissions.

Malo83 · 07-11-2015, 02:01 PM

Have you done a smog test lately? my 83 has all those vacuum lines and they have to be their to pass the visual, be careful what you take off as later down the road it might all have to go back on

Titomars · 07-11-2015, 03:59 PM

Top pic looks to be all cruise control related. 2nd pic is windshield washer hoses.
Third is for the ESC which is emissions related must stay on for Calif. Fourth is the EFE system or heat riser to the older crowd also emissions related and must stay on in Calif.

Mudflapp · 07-11-2015, 10:46 PM

Thanks everyone! Also the truck is NO LONGER in California.

07-11-2015, 01:00 PM	#1
Mudflapp Registered User Join Date: Jul 2015 Location: Palmsprings CA Posts: 2	What are these vacuum parts? Hello everyone! My name is TJ/ mudflapp, I have a 1983 c10 with a SB 350. Im installing a new manifold this weekend, Im trying to eliminate some vacuum lines in the process to clean it up a bit. There's a couple vacuum lines that I don't know what they are going into/what they even are . I took some pictures for you guys maybe you can tell me what they are, and if they can be eliminated? IN the fourth picture (with the red circle) that is right under the header manifold maybe even looks like its attached?? no idea let me know guys!! Thanks: TJ, aka mudflap Attached Images

07-11-2015, 01:41 PM	#2
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: What are these vacuum parts? Top two pics are cruise control server and linkage. Can't make out second pic. Third pic looks like vacuum valve for emissions.

07-11-2015, 02:01 PM	#3
Malo83 Cruzzzn' Vet Join Date: Jan 2005 Location: Porterville,Ca. Posts: 1,918	Re: What are these vacuum parts? Have you done a smog test lately? my 83 has all those vacuum lines and they have to be their to pass the visual, be careful what you take off as later down the road it might all have to go back on

07-11-2015, 03:59 PM	#4
Titomars Registered User Join Date: Feb 2015 Location: Santa Rosa, Ca. Posts: 539	Re: What are these vacuum parts? Top pic looks to be all cruise control related. 2nd pic is windshield washer hoses. Third is for the ESC which is emissions related must stay on for Calif. Fourth is the EFE system or heat riser to the older crowd also emissions related and must stay on in Calif. __________________ 1977 Chevrolet C/10 Silverado. Step-Side, Factory 454, TH400, 3.73 Posi 12 Bolt. 1975 Chevrolet El Camino. 350, TH400, 3.08 Posi 10 Bolt. Last edited by Titomars; 07-11-2015 at 05:27 PM.

07-11-2015, 10:46 PM	#5
Mudflapp Registered User Join Date: Jul 2015 Location: Palmsprings CA Posts: 2	Re: What are these vacuum parts? Thanks everyone! Also the truck is NO LONGER in California.



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