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12-22-2016, 06:13 PM
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#1 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Gas tank fill too slow
Filling add on gas tank takes forever...fuel back-up in line to tank shuts off station pump. There is a vent tube connected.
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12-22-2016, 06:22 PM
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#2 |
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Registered User
Join Date: Jun 2012
Location: Lakewood,New York
Posts: 502
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Re: Gas tank fill too slow
Is that a PVC elbow?
That elbow bend looks too sharp to flow well. Is the flexible rubber hose ribbed on the inside also? That could cause turbulence in the flow also.
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53 Chevy Pickup |
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12-22-2016, 06:30 PM
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#3 |
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Registered User
 
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
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Re: Gas tank fill too slow
I would change the 90 for a 45. If that hose is a radiator hose, be careful! Gas rots them out pretty quick and then you have trash in your tank, fuel lines and, eventually your carb!
__________________
1969 C20 Suburban "Rez Dog" Rebuild America one testicle at a time. US Army 1977-1979 12B Combat Engineer US Navy 1979-1983 Gunners Mate Guns (GMG) NRA Life Member Unrestrained Children in back seats cause Accidents. Unrestrained Accidents in back seats cause Children. |
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12-22-2016, 06:38 PM
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#4 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
Yes it is a PVC elbow (only thing I could find to fit my needs) and the ribbed hose is for fuel not a radiator hose, thought it has smooth inside but had better double check that. Tried 45 elbow but caused too much of an uphill in line to tank.
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12-22-2016, 06:40 PM
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#5 |
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Registered User
Join Date: Jun 2015
Location: Indanapolis, IN
Posts: 603
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Re: Gas tank fill too slow
That pvc elbow has got to go. That is not safe. It is 100% your slow fueling issue anyways.
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12-22-2016, 06:56 PM
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#6 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
I agree the PVC should go...but what can I use to plumb this thing? Tried other metal elbows; exhaust tubing; copper fittings...nothing correct size.
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12-22-2016, 07:02 PM
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#7 |
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All about them K’s
 
Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,513
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Re: Gas tank fill too slow
Could you modify a filler neck from another vehicle to make it work? On my 3100 I used an 80s k5 filler for my stepside fender mounted fuel fill.
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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12-22-2016, 09:01 PM
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#8 |
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Senior Member
Join Date: Oct 2015
Location: Williamston, Mi
Posts: 886
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Re: Gas tank fill too slow
I'd try an exhaust shop, find the size you need and have it bent or welded to fit your application. Good luck
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12-22-2016, 09:23 PM
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#9 |
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Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,161
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Re: Gas tank fill too slow
is the vent line clear?
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12-23-2016, 10:21 AM
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#10 | |
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Registered User
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Gas tank fill too slow
Quote:
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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12-23-2016, 10:24 AM
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#11 |
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Registered User
Join Date: Dec 2012
Location: west valley city Ut
Posts: 120
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Re: Gas tank fill too slow
i had a custom gas neck made from muffler tubing... i agree with old51sedan !!!
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12-23-2016, 01:04 PM
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#12 |
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Registered User
Join Date: Aug 2011
Location: tuolumne,CA
Posts: 74
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Re: Gas tank fill too slow
Check that the vent line has no low spots in it to cause it to hold fuel, thus making it useless. I had this problem on anold motorhome i had a while back. Good luck.
Andy |
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12-23-2016, 05:33 PM
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#13 |
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Registered User
Join Date: Dec 2012
Location: Fort Thomas, KY
Posts: 300
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Re: Gas tank fill too slow
If this is a Blazer tank, there should be another vent port on the passenger side. Connect a hose with a rollover vent to it and stick it up in the bed side. It will allow air to flow out when filling and air to flow in when in use. I actually had to put two of these vents in to get mine to fill properly, one on each side of the tank.
__________________
1972 GMC 1500 Super Custom, 383 Stoker, TH350 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=592157 Engine Thread http://67-72chevytrucks.com/vboard/s...d.php?t=592233 |
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12-23-2016, 05:39 PM
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#14 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: Gas tank fill too slow
Also agree on the exhaust pipe. I have used this company for some hard to find things.
http://www.fillernecksupply.com/90-d...eatured&page=1
__________________
68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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12-23-2016, 05:42 PM
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#15 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: Gas tank fill too slow
Oh and forgot to say make sure you don't have any kinks in the tubes. Kind of looks like the rubber hose has a bit of a kink in it.
__________________
68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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12-26-2016, 02:07 PM
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#16 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
Thanks for all the help and suggestions for this problem, as soon as fuel level drops I'll take truck to local exhaust shop to have them make up new fill tube. Just curious as to why using PVC elbow is such a bad thing, not like it is submerged in fuel all the time...we do use plastic gas cans.
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03-16-2018, 10:26 AM
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#17 | |
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Registered User
Join Date: Oct 2017
Location: Harlingen Texas
Posts: 30
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Re: Gas tank fill too slow
Quote:
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12-30-2016, 05:12 PM
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#18 |
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Before and After
Join Date: Feb 2000
Location: Leduc, Alberta CANADA
Posts: 632
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Re: Gas tank fill too slow
I moved my tank last year, I was told by an old timer to get as much vent as possible to avoid the backing up of fuel when you fill the tank. My tank had 2 extra lines so I used them both as vents. I ran them all the way up to the fill cap area.
To change your 90 degree PVC, go to a parts store ( I went to Acklands-Grainger) and get them to look up 90 degree fuel fill hose. They are surprisingly easy to find. the first place i checked had 4 in stock. in two different sizes. They run around $30 CAD, peace of mind.
__________________
Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA |
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12-30-2016, 06:00 PM
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#19 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
I do have a capped off elbow on top of tank I could use for another vent line, will use that and still have muffler shop rig up something for fill tube. Thanks!
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01-20-2017, 07:19 PM
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#20 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
May have problem resolved, local muffler shop bent a pipe for me and welded it.
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01-22-2017, 09:25 PM
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#21 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
Back together.
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01-22-2017, 09:27 PM
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#22 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,431
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Re: Gas tank fill too slow
That's much better looking! How's the flow?
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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01-23-2017, 06:34 PM
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#23 |
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Registered User
Join Date: Nov 2012
Location: San Diego, CA
Posts: 54
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Re: Gas tank fill too slow
The flow is 10 times better, not perfect but much better, now able to hold the nozzle without it clicking off.
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01-24-2017, 10:20 AM
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#24 |
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Registered User
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
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Re: Gas tank fill too slow
I think I would have used a weldable elbow in order to get the flow better.
 
__________________
1969 C20 Suburban "Rez Dog" Rebuild America one testicle at a time. US Army 1977-1979 12B Combat Engineer US Navy 1979-1983 Gunners Mate Guns (GMG) NRA Life Member Unrestrained Children in back seats cause Accidents. Unrestrained Accidents in back seats cause Children. |
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03-15-2018, 07:54 PM
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#25 |
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Registered User
Join Date: Feb 2011
Location: North Carolina
Posts: 994
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Re: Gas tank fill too slow
Nice, thanks for the updates!
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