Inline Fuel Filter Question

[wayne lawrence]

Hot day, hills and old gas -vapor lock and or fuel starvation? I changed the inline fuel filter and made it home ok. But it was late in the day and
had cooled down a bit. I would like to know if it was the filter.I have an electric pump in 1 of the tanks (no help). Its been a couple of weeks. Its
easy to blow tru now. I cut it open and took out the filter part. I can't blow tru the paper. Is this normal? Does the gas seep/weep tru the paper? I
have never opened 1 before.
--
Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence

 

[Supersessions77]

My filter use to do that all the time till my tanks were dropped and cleaned. best test is to drive it with new filter in same conditions and see if
that did the trick. I keep several of the Qjet filters in my glove box.
--
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA

 

[Matt Colie]

> Hot day, hills and old gas -vapor lock and or fuel starvation? I changed the inline fuel filter and made it home ok. But it was late in the day
> and had cooled down a bit. I would like to know if it was the filter.I have an electric pump in 1 of the tanks (no help). Its been a couple of
> weeks. Its easy to blow tru now. I cut it open and took out the filter part. I can't blow tru the paper. Is this normal? Does the gas seep/weep tru
> the paper? I have never opened 1 before.

Wayne,

If you are trying to blow through the whole filter element, you should be able to do that. But, If you take just a small section, that is a different
game and you will probably not be be able to. The only test is with the filter element in its housing.

Did you unwrap it and see how much filter paper is in there?

Remember, gasoline (even crapohol) is very low viscosity and you a gallon in 6 minutes at 3PSID is what is needed for a 6MPG vehicle That is not a
lot.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[wayne lawrence]

Matt

It sounds like no way to know except road test. Is there any reason to cut open a new one to compare
or is it just a waste of time?
--
Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence

 

[Matt Colie]

> Matt
>
> It sounds like no way to know except road test. Is there any reason to cut open a new one to compare
> or is it just a waste of time?

Wayne,

In my experience, there is nothing to see in most fuel filters that fail to flow. The captured particles are so small that they are not something one
can see.

Even an crude flow test can tell you a lot.

I my last lab, we actually has flow stands for filters that had differential pressure instruments and calibrated flow sources. Not your typical
garage stuff.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[Rdenney]

Matt, if the fuel tank is rusty, the rust will clog the filter with
extremely visible particles.

But I agree that the best way to prevent a clogged fuel filter is to
install it where it's easy to get to and replace it routinely.

Rick "BTDT, got the T-shirt" Denney

> > Matt
> >
> > It sounds like no way to know except road test. Is there any reason to
> cut open a new one to compare
> > or is it just a waste of time?
>
>
> Wayne,
>
> In my experience, there is nothing to see in most fuel filters that fail
> to flow. The captured particles are so small that they are not something
> one
> can see.
>
> Even an crude flow test can tell you a lot.
>
> I my last lab, we actually has flow stands for filters that had
> differential pressure instruments and calibrated flow sources. Not your
> typical
> garage stuff.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com

 

[robert mueller]

Yep, like here:

http://www.gmcmhphotos.com/photos/aa-miscellaneous-photos/p54750-fuel-pump-inlet-filter.html

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Richard Denney
Sent: Thursday, June 29, 2017 1:10 PM
To: gmclist
Subject: Re: [GMCnet] Inline Fuel Filter Question

Matt, if the fuel tank is rusty, the rust will clog the filter with
extremely visible particles.

But I agree that the best way to prevent a clogged fuel filter is to
install it where it's easy to get to and replace it routinely.

Rick "BTDT, got the T-shirt" Denney

 

[Matt Colie]

> Matt, if the fuel tank is rusty, the rust will clog the filter with
> extremely visible particles.
>
> But I agree that the best way to prevent a clogged fuel filter is to
> install it where it's easy to get to and replace it routinely.
>
> Rick "BTDT, got the T-shirt" Denney
>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com

Rick,

I completely agree, but in this case, OP said he had opened the filter. If rust flakes were the issue, I don't think he would have bothered trying to
blow though the paper element.

I think we all have a few of those T-shirts.

Matt

--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[jim kanomata1]

Never run your carb w/o that filter.
You'll end up needing to clean the carb.
That filter works opposite as it allows fuel to flow fro the inside to
outside , so you cannot see the coating of particulates on the outside. Cut
it and look on other side.
The new fuel with ethanal is cleaning up your tank, so you need to put
another Larger filter ahead of the pump.
Should one install it in the wrong area, you'll have vapor loc issue.
There are other things that must be addressed to help avoid this problem.
Call me so we can discuss.

> Matt, if the fuel tank is rusty, the rust will clog the filter with
> extremely visible particles.
>
> But I agree that the best way to prevent a clogged fuel filter is to
> install it where it's easy to get to and replace it routinely.
>
> Rick "BTDT, got the T-shirt" Denney
>

>

> > > Matt
> > >
> > > It sounds like no way to know except road test. Is there any reason to
> > cut open a new one to compare
> > > or is it just a waste of time?
> >
> >
> > Wayne,
> >
> > In my experience, there is nothing to see in most fuel filters that fail
> > to flow. The captured particles are so small that they are not something
> > one
> > can see.
> >
> > Even an crude flow test can tell you a lot.
> >
> > I my last lab, we actually has flow stands for filters that had
> > differential pressure instruments and calibrated flow sources. Not your
> > typical
> > garage stuff.
> >
> > Matt
> > --
> > Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> > Electronically Controlled Quiet Engine Cooling Fan
> > OE Rear Drum Brakes with Applied Control Arms
> > SE Michigan - Twixt A2 and Detroit
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502