Vacuum Leak - Found The Source - This Is A Tricky One.
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From: Thunder Bay Ontario
Vacuum Leak - Found The Source - This Is A Tricky One.
So I finally found the source of all my vacuum woes and its kind of a tricky spot. See pic below. I have tried to use the red gasket maker but it is still sucking air in. Is it possible to change this house without taking the plenum off? Is there a factory hose replacement I can buy?
Any other tricks I can try here?
85 Corvette
Any other tricks I can try here?
85 Corvette
Last edited by mkotz; Jun 6, 2014 at 12:04 AM.
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Joined: Aug 2013
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From: Thunder Bay Ontario
Do you know what that hose is called for me to get a factory one... its pretty bagged out.
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From: SE NY
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I think that is the PCV valve tube, running from the middle of the intake base to the front of the LH valve cover.
Are the threads on the intake base end crossed??
Considering the useage black RTV might not be a wise choice of sealants as I beilive it contains silicon which should not be used around any air intake.
Are the threads on the intake base end crossed??
Considering the useage black RTV might not be a wise choice of sealants as I beilive it contains silicon which should not be used around any air intake.
Last edited by 65Z01; Jun 6, 2014 at 01:21 AM.
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From: Anaheim CA
That hose split on my car and leaked. The symptom was a rough idle and hesitation when going off-idle. It's a 7/16" hose.
On my car the hose was glued to the PCV tube (factory). I didn't do that when I replaced it.
You can replace it without removing the runners. You do have to get the wire loom out of the way to get the PCV tube out.
On my car the hose was glued to the PCV tube (factory). I didn't do that when I replaced it.
You can replace it without removing the runners. You do have to get the wire loom out of the way to get the PCV tube out.
Last edited by Cliff Harris; Jun 6, 2014 at 03:14 AM.
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From: Thunder Bay Ontario
I would prefer to get an oem molded or acdelco tubing for this but I did not know what it was and I am pretty sure I will never find it. But now that I know the size of tube I will buy a piece and try replaying it without taking the runners/plenum off which looks like it is going to be tough.
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It is 10 times better with the gasket and clamp but still not perfect.
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From: Poughkeepsie New York
Mine leaked there as well. I tried different clamps without success. They either didn't hold or you couldn't tighten them because it's a tight spot. I finally just wrapped electrical tape around it and it's been good ever since.
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From: Chewelah Wa
Everyone has had problems with this hose at one time or another, it is best to find a new heat resistant hose that is the right size and replace it. Shouldn't require any glues. I also remember struggling to find the right size hose as well.
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From: Thunder Bay Ontario
I believe I got the right hose 9/16. When you changed it did you take off the plenum or you just removed the fuel injector connection and left the plenum alone?
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Had the same problem on my 87. Replaced it yesterday. Took nuts off of wire loom, took off nut holding tube down. A little persuasion to move tube around. Put on new piece of hose. Idling like new. I am not a mechanic, but it wasn't that hard to do