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07-19-2023, 10:53 AM
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#1 |
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Registered User
Join Date: Jan 2007
Location: vernon b.c.
Posts: 3,022
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gas tank question
My tank has 3 outlets on the sending unit but I only need 2 . the charcoal canister has been taken out some time ago. Question is do I plug the third line up or does it need to vent.
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07-19-2023, 01:21 PM
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#2 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,495
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Re: gas tank question
Assuming the two in use are the suction line to the fuel pump and a return from the pump, then Yes, the third outlet is a vent. OEM solution prior to the canister was a differential vent at the end of a short hose.
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07-19-2023, 04:40 PM
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#3 |
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Registered User
Join Date: Jan 2009
Location: Edgewood, WA
Posts: 107
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Re: gas tank question
Vents are typically the center outlet I believe. My "code M" 84 C20 had vents on both tanks from the factory.
__________________
I may be old, but I still enjoy the feeling of the earth rotating beneath my wheels... |
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07-19-2023, 10:05 PM
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#4 | |
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BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,256
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Re: gas tank question
Quote:
missing information, what year tank/sending unit, probably add a picture for future searches? 1987 for example, feed, return roll over/charcoal/vent... if you plug the charcoal/vent your going to have problems. system will now be sealed. so when the engine is running, its using fuel, now the pump is now pulling a vacuum on the fuel tank and will cause driveablity issues.. if you run the vent right off the tank, you might smell fumes in the garage I ran the vent to the OEM vent line that goes to the front frame rail... its just open. no fumes what so ever in the garage.... fumes/vapors turn back into solid, and solids roll down the line back into the tank.. cliff notes, dont plug it
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1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress |
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07-20-2023, 09:22 AM
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#5 |
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Registered User
Join Date: Jan 2007
Location: vernon b.c.
Posts: 3,022
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Re: gas tank question
thanks and sorry I forgot to say the year. I always assume everyone knows what I have. But I have my answer, don,t plug the line. I will go get one of those vent tubes for the rearend and put that in the hose line
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