LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

changing fuel filter w/a full tank

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Old Jul 23, 2003 | 09:17 PM
  #1  
chevyboy_z28's Avatar
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From: Detroit, MI
changing fuel filter w/a full tank

ok heres the deal, today was the day i designated to do some maintenance to my car and i was able to get a couple things done but due to distractions and stuff i couldnt finish (happens to the best of us ). anyway i flushed and seafoamed the engine, changed the oil, changed the t-stat (160*), cleaned the intake and tb, and planned on tackling the plugs and wires, however... anyway another one of my plans was to change the fuel filter, but seeing as how my car is a 95 the connection was kinda ceased up so i had alot of trouble and the m/f just wouldnt come aloose. my paw is coming home tomorrow and is gonna help me with the rest, but i just filled it up today and put in some chevron fuel injector and fuel system cleaners (only the best ) along w/ 110 octane boost, so finally my question is will changing the filter on a full tank make me lose alot of gas (thats why i tried to do this project b4 i filled up), or will i only lose a lil? should i just wait until it gets extremely low and then change it...will it ever even come out ?
Old Jul 23, 2003 | 09:20 PM
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Just a little.......only a bit from what's in the line.......make sure to have a bucket and cloths ready.
It's also a good idea to use a propane torch as a light sorce while changing your fuel filter.
Smoking can't hurt either.
Old Jul 23, 2003 | 09:40 PM
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You may wanna unscrew the cap off the filler neck to depressurize the tank so that way what little does come out isn't under pressure and you wind up getting a bath.
Old Jul 23, 2003 | 09:43 PM
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As far as I know, the tank can be empty or full (as long as it is not overfull) and the same amount of gas will come out. At first it will seem like "oh sh*t, there is way too much coming out, but then it will stop suddenly. No worries, just change it out.
Old Jul 23, 2003 | 11:45 PM
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Only the fuel in the line will leak out. Forget about the releasing the pressure from the schradder valve under the hood. Just take off the gas cap. If you do it carefully, with a catch pan, you should end up with very little spilled fuel. Once you lossen the bolt and the fuel starts to come out, place the pan under it and wait for the line to drain, this way you wont get soaked with fuel.
Old Jul 24, 2003 | 08:38 AM
  #6  
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Originally posted by fbird95
Only the fuel in the line will leak out. Forget about the releasing the pressure from the schradder valve under the hood. Just take off the gas cap. If you do it carefully, with a catch pan, you should end up with very little spilled fuel. Once you lossen the bolt and the fuel starts to come out, place the pan under it and wait for the line to drain, this way you wont get soaked with fuel.
Why forget about releasing pressure from the shrader valve? You are not going to relieve pressure in the line without doing that.
Old Jul 24, 2003 | 12:26 PM
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well, actually everytime i change the fuel filter on any car i just let the car sit for 3 or 4 hours. I have never had a "spray" of fuel come out like it was under pressure. I think it is easier if you have the time.
Old Jul 24, 2003 | 01:13 PM
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If you let it sit long enough, yes, the pressure will be gone in the lines. Mine will still have some pressure after 12 hrs of sitting.
Old Jul 24, 2003 | 02:53 PM
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95 Silver TA's Avatar
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From: Florida
Originally posted by Pandamonkey

It's also a good idea to use a propane torch as a light sorce while changing your fuel filter.
Smoking can't hurt either.


Thats one way to turn your Z28 into a Firebird


Claude
Old Jul 24, 2003 | 08:51 PM
  #10  
chevyboy_z28's Avatar
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thanx
Old Jul 24, 2003 | 11:54 PM
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I never had a problem with fuel spraying anywhere, by not releasing the pressure from the valve in the engine bay. As long as you let the pressure out by the filter, by slowly lossening the nut, then letting the fuel trickle out, you should end up with no spilled fuel at all.
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