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Where does this hose go?

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Old 09-29-2016, 12:48 PM
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78bluecorvette
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Default Where does this hose go?







Got my engine worked on and saw there was a hose not hooked up. Shop said it was not hooked up when they got it.

Any ideas where this goes or if it is needed?

also, where do my two (one short, one long) hoses coming out of the bottom of the air cleaner connected to the green AC go?

thank you!!!
Old 09-29-2016, 01:00 PM
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78bluecorvette
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Followed the line down to a "Y" connector that one hose seems to be going into a round canister type cylinder and the other into the fender somewhere. Idk

Last edited by 78bluecorvette; 09-29-2016 at 01:11 PM.
Old 09-29-2016, 01:40 PM
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Easy Mike
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Charcoal canister for fuel vapor.
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Old 09-29-2016, 02:16 PM
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Alan 71
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Hi 78,
It appears that there was originally a T in the hose from the pcv valve hose for the vapor canister hose to connect to.
Regards,
Alan


Last edited by Alan 71; 09-29-2016 at 02:16 PM.
Old 09-29-2016, 02:23 PM
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revitup
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The two hoses on the bottom of the air cleaner control the Thermac air valve in the air cleaner snorkel. The longer one goes to the Thermac valve and the short one goes to the vacuum port at the base of the carb in the back.
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Old 09-29-2016, 03:30 PM
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78bluecorvette
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Wow... a lot of great info! Thank you!

im confused why someone would delete the route to the vapor can...

is it really needed?
Old 09-29-2016, 03:48 PM
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Alan 71
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Hi 78,
The vapor canister was part of a sealed fuel tank system that first appeared on cars being sold in California in 1970 and then on ALL cars in 1971.
The purpose of the canister was to accumulate gas fumes from the tank when the engine wasn't running and then have the fumes drawn into the engine by the hose running from the canister to the carb to be burned.
Some folks leave this system in operative but that sometimes leads to people reporting gas smells in their garage.
It's really up to you to decide if you want to have this system working or not.
Regards,
Alan
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Old 09-29-2016, 04:03 PM
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Originally Posted by 78bluecorvette

Got my engine worked on and saw there was a hose not hooked up. Shop said it was not hooked up when they got it.

Any ideas where this goes or if it is needed?

also, where do my two (one short, one long) hoses coming out of the bottom of the air cleaner connected to the green AC go?
I hate photobucket with all its freakin popups but Alan's schematic of the fuel vapor canister hose y connection is spot on if you can get it steady without babes buts popin up!

The other is the air cleaner hose that connects to the backside of a port of the carb on the bottom.

Look up Wilcox (vendor) emissions system hose schematic. It shows the various hose connections and serves as a great trouble shooter.
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Old 09-29-2016, 05:16 PM
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78bluecorvette
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Got it connected!

is it ok that the hoses kind of lay on the aluminum manifold tube? It's pretty tight space with the air cleaner bolted on.
Old 09-29-2016, 06:30 PM
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KapsSA
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Do you have a 90* elbow on the bottom side of the snorkel where the aluminum pipe connects? Looks like you have it tucked up into the snorkel without it.
Normally, the hoses go underneath the flex pipe.
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Old 09-29-2016, 08:31 PM
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revitup
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Don't break that double hose clip on the bottom of the air cleaner. Can't get those anywhere.
Old 09-29-2016, 11:49 PM
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78bluecorvette
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Originally Posted by KapsSA
Do you have a 90* elbow on the bottom side of the snorkel where the aluminum pipe connects? Looks like you have it tucked up into the snorkel without it.
Normally, the hoses go underneath the flex pipe.

D'oh! The 90 elbow is missing. I tried to find it on Ecklers and couldn't. Do they remake the part?

Thanks!!!
Old 09-30-2016, 12:31 AM
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revitup
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It's available. Chicago Corvette has it, among others. Going price seems to be about $40-$45.
Old 10-01-2016, 01:14 AM
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Originally Posted by revitup
It's available. Chicago Corvette has it, among others. Going price seems to be about $40-$45.
There's a few on ebay.................
http://www.ebay.com/itm/1976-81-corv...dW53uL&vxp=mtr

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