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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: txchainsawgogi on March 06, 2011, 05:18:05 pm

Title: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 05:18:05 pm

on a 78 350.

the hoses that come off of this dont go to anything and have been that way for awhile. i thought they just went to the windshield fluid sprayers but now im not sure.

coming off the back of the intake:
(http://i1134.photobucket.com/albums/m612/wolfmantough/2011-03-06162407.jpg)



also... what does this do? it looks like its going to get in the way when i put on my headers finally...

(http://i1134.photobucket.com/albums/m612/wolfmantough/2011-03-06162342.jpg)

Title: Re: help identifying two parts
Post by: HAULIN IT on March 06, 2011, 05:33:38 pm

 The hose/metal tube in your first picture should go to the modulator on the transmission. The other Two on there would go to something that need a vacuum source...plug them if they are not going to anything.
 The lower photo is your water temp. sending unit. The headers will be made to clear this...it's there on many SBC's. Hope this helps, Lorne

Title: Re: help identifying two parts
Post by: 1979C20 on March 06, 2011, 05:38:41 pm

The top pic, on my truck one of those vac hoses goes to the heater. And yeah, temp gauge on the bittom pic. Different style heads and headers, it might be in the way. If it is just cut the flange to make it fit.

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 05:53:15 pm

what do those lines normally go to? thats crazy that its been disconnected this whole time  :-\

the base of that T connector seems to be really loose too.

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 06:43:12 pm

upon even further inspection, the metal line thats on top of the T connected doesnt feel like it goes to anything. it goes back behind/under the firewall and i cant see where exactly its supposed to connect. uhhh what?!

Title: Re: help identifying two parts
Post by: bake74 on March 06, 2011, 07:35:32 pm

Quote from: HAULIN IT on March 06, 2011, 05:33:38 pm

The hose/metal tube in your first picture should go to the modulator on the transmission. The other Two on there would go to something that need a vacuum source...plug them if they are not going to anything.

     Are you sure it's not going to the transmission ?

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 08:09:18 pm

should it be wiggling freely? it seems to have too much play to be connected(at least properly, anyway) to anything.


this seems like a simple problem without a simple fix.

Title: Re: help identifying two parts
Post by: Grim 82 on March 06, 2011, 08:16:23 pm

If any of those things are loose or not hooked up, you will have a vacuum leak there. Should be simple enough to track down and replace the hoses, and put some pipe sealer on the t-fitting and thread it tight into the manifold.

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 08:35:39 pm

Quote from: Grim 82 on March 06, 2011, 08:16:23 pm

If any of those things are loose or not hooked up, you will have a vacuum leak there. Should be simple enough to track down and replace the hoses, and put some pipe sealer on the t-fitting and thread it tight into the manifold.

except i cant see the one that goes(maybe?) the the transmission!

Title: Re: help identifying two parts
Post by: 4x4orbust on March 06, 2011, 09:00:09 pm

Quote from: txchainsawgogi on March 06, 2011, 08:35:39 pm

except i cant see the one that goes(maybe?) the the transmission!

the trans vacuum hose goes between the motor and the firewall towards the passenger side.   if you are looking up at the tranny from under the truck, it should  be up on the pass. side connected to the modulator.

Title: Re: help identifying two parts
Post by: Blazin on March 06, 2011, 09:07:14 pm

One of them could go to the brake booster too. If in fact they are disconnected it must run like crap. Thats a huge vacuum leak.

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 06, 2011, 09:39:38 pm

brake booster line is fine. the one to the trans is fine too...its just that the rubber connecter down by the modulator is really soft and really does have a lot of wiggle to it.

Title: Re: help identifying two parts
Post by: Irish_Alley on March 06, 2011, 11:50:49 pm

it should be booster trans and pcv

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 07, 2011, 05:56:23 pm

And this guy? It has a vacuum line behind it that goes to nothing!

(http://i1134.photobucket.com/albums/m612/wolfmantough/2011-03-07163833.jpg)

Title: Re: help identifying two parts
Post by: Captkaos on March 07, 2011, 06:30:13 pm

Cruise Control.

Title: Re: help identifying two parts
Post by: txchainsawgogi on March 07, 2011, 07:35:15 pm

Hahaa ok. Don't need that! All this time I thought it was connected because its been tucked under the firewall.