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Discussion Starter #1
Does anyone know the purpose of the sleeve around the hose I have pointed out??



I am about to put on some new hoses and they do not have this extra sleeve. I think these sleeves are the for extra support as this is a pretty sharp angle in the hose. The sleeve won't really hold pressure is the under hose cracks, so I don't know. Anyone know for sure?
 

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Discussion Starter #3
That is what I am hoping. I guess I am going to find out.
 

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During engine torque/twist under load, it is to keep the vacume line from crimping which could completely cause no flow or induce turbulence in the air flow which woul dcause different reading by the ECU.
 

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It's not to keep it from bending.

Most vacuum lines have those sleeves around them to prevent anything from rubbing directly on the line itself. If you've had much engine experience, you know those soft rubber hoses will have a hole worn through them pretty quick if anything rubs on them. Placing that sleeve around the line prevents anything from happening to that line.

If you look at various other rubber lines throughout the engine bay, you will see more of these sleeves used....most likely on the radiator hoses, among others.
 

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Originally posted by Niceguy@Oct 6 2004, 10:15 PM
It's not to keep it from bending.

Most vacuum lines have those sleeves around them to prevent anything from rubbing directly on the line itself.  If you've had much engine experience, you know those soft rubber hoses will have a hole worn through them pretty quick if anything rubs on them.  Placing that sleeve around the line prevents anything from happening to that line.

If you look at various other rubber lines throughout the engine bay, you will see more of these sleeves used....most likely on the radiator hoses, among others.

thx for the explanation , I've always wondered about this...
 

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That is also part of it as well. The worst thing that can happen is a hole in a vacume line for sure. Crimping, holes, anything to cause a change in the air flow. Especially the one that directly enters the auto's computer.
All very important.
 
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