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Old 11-09-2012, 03:18 AM   #1
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Default What's the Vacuum Hose Diameter?

What's the diameter of the vacuum hose?

Mine is dry rot pretty bad, and it has just started to leak.

I could pull it off to find the right size match at the auto parts store, but whatever hose I try to pull off is going to break and crumble on me. Then, it'll be my luck the auto parts store won't have that size.

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Old 11-09-2012, 03:49 AM   #2
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5/32nds
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Old 07-25-2020, 08:35 PM   #3
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5/32nds
What's the ID, I'm assuming that 5/32" is the OD.
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Old 07-25-2020, 08:37 PM   #4
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Originally Posted by jp2code View Post
What's the diameter of the vacuum hose?

Mine is dry rot pretty bad, and it has just started to leak.

I could pull it off to find the right size match at the auto parts store, but whatever hose I try to pull off is going to break and crumble on me. Then, it'll be my luck the auto parts store won't have that size.

Did you end up with silicone hoses? I was thinking of getting blue silicone hose so I easily identify what I've replaced and it matches the NGK spark plug wires, lol.


what ID did you end up with?
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Old 07-25-2020, 09:19 PM   #5
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Silicone hoses are nice, I did my Audi with them.



5/32 is .156". It's the ID.
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Old 07-25-2020, 11:35 PM   #6
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Silicone hoses are nice, I did my Audi with them.



5/32 is .156". It's the ID.

thanks for the clarification! Should I get 5/32 = 4mm or 9/64 =3.5mm
I guess since their vacuum it won't be too bad if toward the bigger end.
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Old 07-27-2020, 12:48 AM   #7
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Quote:
Originally Posted by Arv View Post
thanks for the clarification! Should I get 5/32 = 4mm or 9/64 =3.5mm
I guess since their vacuum it won't be too bad if toward the bigger end.
HINT: Remove ONE hose that matches others your truck uses...take it to the parts store. They have rolls of air hose in all sizes, usually behind the counter. They sell it by the foot. You can buy several feet and replace a few hoses at the same time. Then move on to another size hose your truck uses. Do same thing.

And NEVER pull more than ONE hose at a time from your truck, especially the skinny ones that do air pollution stuff. You will forget which goes to what in a quick, fast, New York hurry. I foolishly did that once on an 89 I owned. One at time on the replacements.
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Old 07-27-2020, 03:47 AM   #8
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If you must drive the truck cut a half inch or so off one that has plenty of excess and take that in. For vacuum hose I go smaller, especially when working with silicone. Silicone hoses can stretch quite a bit. A vacuum leak can be a huge PITA.
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Old 07-27-2020, 04:37 AM   #9
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Quote:
Originally Posted by XoXSciFiGuy View Post
HINT: Remove ONE hose that matches others your truck uses...take it to the parts store. They have rolls of air hose in all sizes, usually behind the counter. They sell it by the foot. You can buy several feet and replace a few hoses at the same time. Then move on to another size hose your truck uses. Do same thing.

And NEVER pull more than ONE hose at a time from your truck, especially the skinny ones that do air pollution stuff. You will forget which goes to what in a quick, fast, New York hurry. I foolishly did that once on an 89 I owned. One at time on the replacements.
That's one of the reasons I want to use a different color so I can tell what I've replaced.
Yes definitely I e hose at a time.
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Old 07-27-2020, 04:39 AM   #10
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Quote:
Originally Posted by Deerhurst View Post
If you must drive the truck cut a half inch or so off one that has plenty of excess and take that in. For vacuum hose I go smaller, especially when working with silicone. Silicone hoses can stretch quite a bit. A vacuum leak can be a huge PITA.
With what you said, I'm going with the 3.5 mm. I will measure several nipples with my caliper and go smaller but I have a feeling it will end up to en 3.5 mm but will post here if the fit is not right.
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