STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc. - Chevelle Tech
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post #1 of 5 (permalink) Old Aug 12th, 06, 1:14 AM Thread Starter
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STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc.

You may have heard that the swapped engine is now running (suprisingly quite well i might add).

I would now like to get into vacuum lines. By the way, i have seen the new vacuum hoses by MR. Gasket that are not rubber, but silicone and they're supposed to be better than rubber. But more on that later.

Let's take a look at my setup:


A) What is this?

B) I'm thinking this is the choke.
b1) Does this vacuum hook up here? I connected it because it seemed like it should go there. How does this work?

C) Should the advance for the dist go to c1? Or does it matter much where it goes?

D1 and 2) Do you have any idea what these would be for?

More:






E) and F) Do you have any idea what these might be for?

G) What about this?

h) I am aware about the trans modulator thing and i will take care of it asap.

2) By the way, that is a remanufactured carb that i got at pepboys for $100 and the core was $25. The part # is Champion 3735. The thing on top of the airhorn is an adapter from Spectre to go from 3 1/16 to the popular 5 1/8 air cleaner size. I'll get the part # later.

Is this a 2GV or a 2GC? I think it is a 2GV; I just matched the old one to the new one at pepboys.
Also, don't worry about the water on the manifold; My thermostat housing is leaking and i will install a new gasket asap.
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post #2 of 5 (permalink) Old Aug 15th, 06, 12:28 AM
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Tony
 
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Post Re: STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc.

I dont know about A but i do know the following pretty well

B: I believe is a hot air (integral maybe) type of choke operated by heated vacuum air.

B1: Is correct, this is used to operate B according to exhaust heated air and or air velocity.

C: Should goto E.

C1: Is for constant canister purge and or timed canister purge and a hose from there should go to the EVAP canister into the "CARB" port on the top of the canister.

D2 With the rubber cap: is or was used for the THERMAC type air cleaners with the heatstove on the pasenger side exhaust manifold and have a round object on the top of the snorkle with the metal pipe undernieth, hey have two tubes that goes to a temperature opperated thing that says AC on it, one goes to the round thing on the snorkle and the other goes to D2, since it obviously seems like your not using the stock air cleaner anymore D2 can stay capped off.

F: F can be capped off.

G: I think G needs manifold vacuum to operate the choke, is it going to the choke (B)? picture is sorta confusing where G is, if it is try connecting G to D.

H: H goes to that fitting on the manifold to the right of the distributor as im sure you know.

The carb looks like it is a 2GC...
All of the above is based on an original setup for the most part.
Hope it works for ya.
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post #3 of 5 (permalink) Old Aug 15th, 06, 9:21 AM
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Mark
 
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Re: STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc.

I believe A is the EGR valve and should be connected to vacuum source at base of carb or from manifold.

Been a LONG time since I worked on a 2bbl rochester, don't remember where all the lines go.

Interested in hearing about those vacuum lines!

Mark

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post #4 of 5 (permalink) Old Aug 15th, 06, 3:35 PM
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Re: STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc.

A is an egr valve...it should be connected to a thermostatic vacumn valve and then to prted vac at the carb. The thermostatic valve prevents the egr from working with a cold engine. I think g needs to go to a vent at the air cleaner.. b1 is in the proper place and with the engine running there should be vac being applied to this by the carb...that is what pulls the hot air into the choke housing to heat the cap.
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post #5 of 5 (permalink) Old Sep 2nd, 10, 1:51 AM
Edward
 
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Re: STEWIE'S ENGINE SWAP/vacuum lines, rochester 2GV carb etc.

Good info, I was trying to figure out how the hot air works its way into the choke?
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