| Proper fuel pump [message #362418] |
Tue, 16 February 2021 10:04  |
|
|
Dont let others work on your rig! Guy installed wrong pump, whats the proper one? Showing all kinds for 455 olds engine. Engine surges and fuel libe freeze is an issue. Old pump worked flawlessly for over a decade on CA etholated gas! Looks like there is a bolt jammed into one of the pump ports? Wtf
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
|
|
|
|
| Re: Proper fuel pump [message #362420 is a reply to message #362418] |
Tue, 16 February 2021 10:54  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
|
Senior Member |
|
|
that is a common thing....
there are 2 port and 3 port fuel pumps for the 455, and usually when you go to the store, they will get out the 3 port. something to do with A/C or not, or the years.
it has been a while, but I remember just asking for a 75 torornado pump, and if that comes out as a 3 port, then I ask for a 74,, or a 73, and eventually they get the right 2 port pump from the back room. This method is used on a few other parts too, like power steering pumps.
the 3 port pump is also installed on purpose. many people would use that 3rd port(return line), and plumb it around and back into the fuel filler neck. the claim is that "helps" vapor lock.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
|
|
|
|
| Re: [GMCnet] Proper fuel pump [message #362421 is a reply to message #362418] |
Tue, 16 February 2021 10:52 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Shan,
You're running a Toronado fuel pump for one with the air conditioning
option -- it has a fuel return port, which is where the bolt's been
inserted. It's a common practice, which usually only results in another
leak possibility, from all I've heard.
At one time the correct pump and the "3-line" pump had the same NAPA part
number except for the last digit, but looking at NAPAOnLine.com, I see only
one listing -- for the 3-line pump. :-(
Apparently you'll have to shop elsewhere and check the configuration before
paying for it.
Ken H.
On Tue, Feb 16, 2021 at 11:05 AM Shan Rose via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Dont let others work on your rig! Guy installed wrong pump, whats the
> proper one? Showing all kinds for 455 olds engine. Engine surges and fuel
> libe
> freeze is an issue. Old pump worked flawlessly for over a decade on CA
> etholated gas! Looks like there is a bolt jammed into one of the pump ports?
> Wtf
> --
> 73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: Proper fuel pump [message #362520 is a reply to message #362418] |
Thu, 25 February 2021 06:35 |
 |
PeteSr
Messages: 26
Registered: October 2020
Location: New Port Richey, FL
Karma: 0
|
Junior Member |
|
|
So this is a timely topic for me.
I am replacing my dash AC compressor. While removing it I noticed that my fuel pump is a three port with a one inch plugged rubber tube coming off the third port! The tube looks old, and has a bolt clamped to plug it. I can just imagine this thing leaking. The consequences of that are either a fire or pumping all the fuel out. Either way I am not happy with this situation and intend to remedy it before driving the coach anymore.
So, does anyone know where I can find a two port pump?
If I cannot find a two port, I suppose I could get a new three port mechanical pump and solder/TIG the third port closed. Or has anyone converted to an electric fuel pump? Is there a kit available?
Regards,
Pete
78 Eleganza II
Stock 403 w/ Carb
Single Cinnebar bags
6kW Onan
[Updated on: Thu, 25 February 2021 06:59] Report message to a moderator |
|
|
|
|
|
| Re: Proper fuel pump [message #362523 is a reply to message #362418] |
Thu, 25 February 2021 07:58 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
|
Senior Member |
|
|
Do not use the common rubber caps with hose clamp as found in auto parts stores for return port. They are not E10 (or probably even E0) resistant and will check and spray fuel in a short time, like a year. As they say “injury or death may result”.
John Lebetski
Woodstock, IL
77 Eleganza II
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
