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03-25-2009
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Plenum Vacuum lines...
In chasing my plenum vacuum leak, I ran across hard emission lines sold in a packet at Autozone. The line is slightly bendable and I found that if you take a hairdryer, put it on high heat you can mold the lines to the same configuration of the originals and use the factory fittings. UPon heating, you can twist the line, turn it with 90 degree bends and it stays formed in that position.
Once I heated the line, I held it in place and then switched the hair dryer to cool to help the molding process. Obviously a heat gun would work better, but this worked well. I also noticed that Dorman sells a three way check valve just as we have under the plenum.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-25-2009
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#2 |
 
Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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Re: Plenum Vacuum lines...
Nice find! Thanks for passing it on also!
 Just in time for my under plenum excursion this weekend. That 3 way vac check will put a period on my punch list for under there. I'll have to take a trip to A/Zone and look at their dorman selection. You don't have a P/N on it?  Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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03-25-2009
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#3 | |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Secondaries?
Quote:
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03-25-2009
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Plenum Vacuum lines...
No part # its in the misc section for repair parts, where they have door universal door handles, hood latch release cables, etc.
The vac hose is back by the PCV valves in the back of the store
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-26-2009
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#5 | |
Join Date: Jul 2004
Location: Kalamazoo MI
Posts: 1,753
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Re: Plenum Vacuum lines...
Quote:
what did you use to glue the ends to this hose?
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JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything. |
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03-26-2009
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#6 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Plenum Vacuum lines...
Did not need glue to seal
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-27-2009
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#7 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Plenum Vacuum lines...
What size tubing replaced the stock stuff?
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03-27-2009
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#8 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
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Re: Plenum Vacuum lines...
you can buy the exact size as factory, pep boys kragens and auto zone all sell every size of plastic hose that one would need
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03-27-2009
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#9 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Plenum Vacuum lines...
The tubing size is 3.9mm.
H
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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03-27-2009
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#10 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: Plenum Vacuum lines...
I know I have busted vacuum spider at the moment and will be pulling the plenum to repair the vacuum line. I also have a set of FIC injectors which I will be replacing at the time.
I was thinking about replacing at least easy ones with 1/8" or 3/32" OD aluminum tubing. If it needs to be bent, I figured a wire coat hanger inside the tube while bending may keep it from crimping. Has anyone tried this before? |
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