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I replaced every vacuum line on my 460 with coast gaurd approved rubber fuel lines. They won't collapse and they last a lot longer than the hard plastic lines.
I replaced every vacuum line on my 460 with coast gaurd approved rubber fuel lines. They won't collapse and they last a lot longer than the hard plastic lines.
Ok thanks for the tip. So you think it’s an issue with the lines themselves rather than an issue somewhere else? That line in particular is much larger in diameter.
Last edited by Bryantkalagian; Jan 16, 2025 at 11:31 PM.
Another option is to remove this adapter, and connect the rubber line directly to the nipple on the vacuum reservoir. That would eliminate the piece that's kinking.
The purpose of the adapter is to maintain orientation of the vacuum lines.
The side marked "vac", is the outgoing connection to a vacuum solenoid.
The other side, sometimes marked "man", is the vacuum supply, from the manifold, to the reservoir.
There's a check valve inside the vacuum reservoir, behind the line coming from the manifold, to prevent variations in vacuum.
You can also make your own 90⁰ adapters if needed.
The older "coffee can" reservoirs had the same adapter. The third post maintains orientation.
Since the reservoir is marked, you don't absolutely need the adapter.
Another option is to remove this adapter, and connect the rubber line directly to the nipple on the vacuum reservoir. That would eliminate the piece that's kinking.
The purpose of the adapter is to maintain orientation of the vacuum lines.
The side marked "vac", is the outgoing connection to a vacuum solenoid.
The other side, sometimes marked "man", is the vacuum supply, from the manifold, to the reservoir.
There's a check valve inside the vacuum reservoir, behind the line coming from the manifold, to prevent variations in vacuum.
You can also make your own 90⁰ adapters if needed.
Ok thanks I’ll get rid of the adapters. For what it’s worth, it’s not kinking, the hose itself is collapsing flat.
What kind of tubing are you using? If it is generic designed for washer fluid that is the wrong type of tubing.
just generic vacuum tubing from oriellys. I used a larger diameter tube for that connection because the nipple is much larger than the others. I’m guessing the larger diameter is more susceptible to collapse.
I used Gates 5/32" ID vacuum/windshield washer hose from the local brick and mortar store.
Where I needed to reduce it down, I used a short piece of 1/4", like in the picture I posted above.
I went to a rubber hose shop and got 1/4" and 5/32" coast guard approved fuel supply hose for about $1.50/ft. Regular rubber hose at the auto parts store was $10/ft.
