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10-07-2016, 10:01 PM | #1 |
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Fuel Filter only about 50% full
Quick question. On my wife's 66 c10, she has this inline fuel filter pre pump. It only is ever about 50% full even when running.
I would think it should be more full than this, and obviously, there is an air pocket in it but I cannot seem to get rid of it. I have done some searching around and cannot find much info on the filter being pre pump like this. It does not seem to affect the engine idling or giving it gas, we have not driven it yet as this is a rebuilt motor going back in and I still have a laundry list of things to do to get it all finished up. |
10-07-2016, 11:09 PM | #2 |
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Re: Fuel Filter only about 50% full
See if you can find non-ethanol gasoline. put that in and see if the air pocket goes away. If it does, thats your problem. The ethanol is breaking down and evaporating causing the air pocket.
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10-08-2016, 09:23 AM | #3 |
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Re: Fuel Filter only about 50% full
I'd guess that is normal. Iirc, the post pump filters do the same thing. Install one and see--I'd want a post pump one anyhow--both = better. If it performs correctly, forget the concern.
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10-08-2016, 10:33 AM | #4 |
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Re: Fuel Filter only about 50% full
While running, can you see the fuel agitating in the filter indicating that fuel is being pulled? If it's just sitting and idling the high demand for fuel is not there vs at rpm. If you took it for a drive and accelerated hard a few times it would probably fill up.
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1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
10-08-2016, 06:31 PM | #6 |
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Re: Fuel Filter only about 50% full
It's not air you see but vacuum. If it was on the other side of the pump it would get full. If you put a metal filter on where you can't see it & problem solved!
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10-08-2016, 08:09 PM | #7 |
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Re: Fuel Filter only about 50% full
Filters go between carb and pump, not between tank and pump (on mechanical systems). The instructions expressly state this for the type of filter you are running.
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10-08-2016, 08:39 PM | #8 |
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Re: Fuel Filter only about 50% full
jay is right. But on the other hand my 580K Case backhoe has one of these inline filters right at the tank petcock, then to a primary filter, then the lift pump, then the secondary filter then on to the injection pump. I thought it was a mickey mouse p.o. hack job but there it is in my parts book! Go figure!
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10-08-2016, 09:33 PM | #9 |
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Re: Fuel Filter only about 50% full
Then your golden.
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
10-09-2016, 12:13 AM | #10 |
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Re: Fuel Filter only about 50% full
I call BS .......I have run filters pre-pump for years NEVER had a problem (keeps any crap out of the pump and keeps a HARD line to the carb , to many cars/trucks burn to the ground when someone has cut the hard line and installed an in-line filter with hose and few years later the cheap ass hose that is made today starts spraying gas all over the place and POOF )...... IN 72 ( sure there were other years also) chevy (OEM) ran a frame mounted filter JUST UNDER the cab on C60 with 366
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10-09-2016, 12:17 AM | #11 | |
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Re: Fuel Filter only about 50% full
Quote:
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1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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10-09-2016, 04:31 AM | #12 |
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Re: Fuel Filter only about 50% full
The frame mounted filter in 72 C60 was a paper filter
THIS is what was used http://www.2040-parts.com/chevy-gm-o...ebay--i991038/ Last edited by jtrichard; 10-09-2016 at 04:39 AM. |
10-09-2016, 10:47 AM | #13 |
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Re: Fuel Filter only about 50% full
if it was plugged up dirty it would be full
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10-09-2016, 10:52 AM | #14 | |
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Re: Fuel Filter only about 50% full
Quote:
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1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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10-09-2016, 01:12 PM | #15 |
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Re: Fuel Filter only about 50% full
I thank you answered your own question if it runs ok. Rubber hose? been around for years. use good fi rated hose and keep an eye on it.
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1961 chevy K10 my build is------------61K10 build |
10-09-2016, 08:54 PM | #16 |
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Re: Fuel Filter only about 50% full
Back to the ORIGINAL question, the Farther the pump has to PULL the fuel, the more EMPTY SPACE will be in that filter. Don't hurt a thing!
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10-09-2016, 09:44 PM | #17 |
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Re: Fuel Filter only about 50% full
IF the OP took the hose off the fuel pump (with full tank of gas) and hold it straight up then re-hook that should get rid of the air pocket
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10-11-2016, 05:05 PM | #18 |
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Re: Fuel Filter only about 50% full
Wow lots of good information, there is a filter post pump as well, but its not see through so I have no idea if there is air in it or not.
But generally I think the main thing to take away is that it is fine. I did try to unhook it turn it upside down but the airpocket didnt go away. But im just going to leave it for now until we have any problems. Thanks guys Posted via Mobile Device |
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