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1972 C3 Engine / Emissions Vacuum Diagram

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Old 07-30-2010, 02:24 PM   #1
VetteTech81
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Default 1972 C3 Engine / Emissions Vacuum Diagram

I am looking for a vacuum diagram, NOT FOR THE HEADLIGHTS, but for the engine and or emissions routing, ie distributor vacuum routing ect. I am trying to help a friend of mine. Thanks!

-=Rick
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Old 07-30-2010, 02:27 PM   #2
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Your friend could use the assembly instruction manual (AIM). It shows the hose routing and color codes.

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Old 07-30-2010, 02:43 PM   #3
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Originally Posted by Easy Mike View Post
Your friend could use the assembly instruction manual (AIM). It shows the hose routing and color codes.

I'm sure he could.. but if anyone has atleast 1 page with vaccum info for the emissions ect. I could print off for him that would be helpful. I know I've shared many diagrams in C4/C5/C6 forums over the years... Since that is what I work on mainly, I am not really a big help to him with service info, but would like to try to help him out if possible without waiting for or paying for a manual.

Thanks,
-=Rick
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Old 07-30-2010, 04:01 PM   #4
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Hi Rick,
Knowing which engine you're working on will help clarify what information you need.
Base, LT-!, or 454?
Regards,
Alan
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Old 07-30-2010, 04:28 PM   #5
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Hi Rick,
Knowing which engine you're working on will help clarify what information you need.
Base, LT-!, or 454?
Regards,
Alan
I believe it's a base 350.. though they didn't say..
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Old 07-31-2010, 09:38 AM   #6
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Hi Rick,
Here's a photo of a base 72 engine.
1 small hose from the vapor canister to a nipple on the front of the carb.
1 large hose from the vapor canister to the pvc valve and then to a nipple on the front of the carb.
1 small hose from the distributor can to the TCS solenoid and then to a nipple on the side of the carburetor. The third port on the solenoid has a small foam filter on it.
Hope this helps!
Regards,
Alan

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