1972 ls5 vented gas?
Melting Slicks
Joined: Mar 2008
Posts: 2,023
Likes: 6
From: Austin Tx
I believe the non-vented cap is for emmisions control. The non vented cap would contain the gas fumes so that they could be sucked into the vapor canistor, and then sucked into the carb and burnt off the next time the car was run.
So, I think if your car has a vapor canistor, and it's operational, then you should have a non-vented cap. Many people have disabled the vapor canistor by blocking the lines, and switching to a vented cap. If the system isn't sucking out the fumes, and releasing the pressure in the tank, you need to use a vented cap.
So, I think if your car has a vapor canistor, and it's operational, then you should have a non-vented cap. Many people have disabled the vapor canistor by blocking the lines, and switching to a vented cap. If the system isn't sucking out the fumes, and releasing the pressure in the tank, you need to use a vented cap.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
I believe the non-vented cap is for emmisions control. The non vented cap would contain the gas fumes so that they could be sucked into the vapor canistor, and then sucked into the carb and burnt off the next time the car was run.
So, I think if your car has a vapor canistor, and it's operational, then you should have a non-vented cap. Many people have disabled the vapor canistor by blocking the lines, and switching to a vented cap. If the system isn't sucking out the fumes, and releasing the pressure in the tank, you need to use a vented cap.
So, I think if your car has a vapor canistor, and it's operational, then you should have a non-vented cap. Many people have disabled the vapor canistor by blocking the lines, and switching to a vented cap. If the system isn't sucking out the fumes, and releasing the pressure in the tank, you need to use a vented cap.
Yep, no canister use a vented cap. If you have the whole vapor control system, use a non-vented cap.
Melting Slicks
Joined: Mar 2008
Posts: 2,023
Likes: 6
From: Austin Tx
Not sure when they were introduced, 70 or 71??? But, all 72's should have them. The vapor canistor should be behind the drivers side louvre. It should have 2 lines from the carb, a larger one that is also connected to the PCV valve, and another smaller one connected to a vacuum port on the carb. There is a third line that connects to the canister from the fuel seperator on the gas tank.
