| [GMCnet] Heat stroke [message #93204] |
Sun, 25 July 2010 17:44  |
Steve Phillips
Messages: 63
Registered: February 2004
Karma: 0
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Hi All
Just returned from a 260 mile trip in the 78 Birch. Everything ran
fine until things started heating up Then Vapor lock. Stopped and
checked out the filter No Filter. After I sat for a while the Coach
started and ran fine as long as I kept the engine hatch open. That was
real fun in 90 plus heat. Anyone on line have a fix for vapor
lock.other than an elec fuel pump? I Hate elec fuel pumps,,,, is there
any type of wrap for the fuel lines that might help?
Thanks
Steve
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| Re: [GMCnet] Heat stroke [message #93208 is a reply to message #93204] |
Sun, 25 July 2010 17:51  |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Steve,
Then you're gonna hate the answer!
It's not just the fuel lines, it's the tanks. At 9" above the
pavement, they get a lot of radiant heat. If you don't like waiting
for things to cool down, pull into the nearset filling station and add
some cooler fuel. This works well.
Then, when you get home, do the thing you hate.
On Sun, Jul 25, 2010 at 3:44 PM, steve <mr34@pipeline.com> wrote:
>
> Hi All
> Just returned from a 260 mile trip in the 78 Birch. Everything ran
> fine until things started heating up Then Vapor lock. Stopped and
> checked out the filter No Filter. After I sat for a while the Coach
> started and ran fine as long as I kept the engine hatch open. That was
> real fun in 90 plus heat. Anyone on line have a fix for vapor
> lock.other than an elec fuel pump? I Hate elec fuel pumps,,,, is there
> any type of wrap for the fuel lines that might help?
>
> Thanks
> Steve
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Heat stroke [message #93214 is a reply to message #93208] |
Sun, 25 July 2010 19:33 |
bukzin
Messages: 840
Registered: April 2004
Location: North California
Karma: 0
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[quote title=Steven Ferguson wrote on Sun, 25 July 2010 15:51]Steve,
Then you're gonna hate the answer!
It's not just the fuel lines, it's the tanks. At 9" above the
pavement, they get a lot of radiant heat. If you don't like waiting
for things to cool down, pull into the nearset filling station and add
some cooler fuel. This works well.
Then, when you get home, do the thing you hate
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Not sure how common it is, but when my buddy removed
his fuel cap at the gas station he got a bath of
hot gasoline.
Bukzin
1977 Palm Beach
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| Re: [GMCnet] Heat stroke [message #93215 is a reply to message #93214] |
Sun, 25 July 2010 19:51 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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That is one of the first things you learn when you start vapor locking the gas is hot and likely rumbling down there. Take the cap off slowly if you want to stay dry( not near as bad as a radiator cap ). It will take a while to get fresh gas in the tank but the more you get in the easier it goes in as the existing gas mixes with the fresh gas.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Heat stroke [message #93229 is a reply to message #93204] |
Sun, 25 July 2010 21:34 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Go to the airport and tell them you want to buy about 18" of Fire Sleeve (decide on the diameter first). Wrap the hardline between the mechanical fuel pump and the carb inlet with rubber hose then wrap it with firesleeve and ty-wrap the whole thing together. This has helped me from making a bad situation (hot fuel) into a vapor lock situation (really really hot fuel). And I drive in 100F plus temps fairly often and (knock on SMC) I haven't had any vapor lock problem that has caused a complete engine stall.
Keeping the tank pretty full could help as would the idea of putting in cool fuel (but you need to put in a fair amount to really bring the temp down). Some guys hose down the outside of the fuel tanks with cold water, but that too would take alot of water to make any real difference.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Heat stroke [message #93245 is a reply to message #93214] |
Mon, 26 July 2010 00:22 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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| bukzin wrote on Sun, 25 July 2010 17:33 |
+++++++++++++++++++++++++++++++++++++++++
Not sure how common it is, but when my buddy removed
his fuel cap at the gas station he got a bath of
hot gasoline.
|
Oh, it can happen. Let the pressure off very slowly. This can also be an indication that the vapor separator in front and above of the left front-most rear tire is stuck or has a kink in a hose. This is a good part of EPA stuff. It lets vapor but on raw gas into the carbon canister behind the right front wheel. Later, when driving, the fumes are sucked into the engine and help you drive down the road. There is a little ball inside and it can get stuck so no vapor or raw gas can vent from the tank. They are being re-manufactured. I know the Sirums manufactured one early on. You can also get one at any Corvette supply house.
It is simple enough to test the separator. Pull off the hose going to the gas tank, put a small piece of hose on it and blow. You should be able to move air easily.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] Heat stroke [message #93259 is a reply to message #93214] |
Mon, 26 July 2010 06:56 |
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Tangerine
Messages: 192
Registered: February 2004
Location: Livonia, MI
Karma: 0
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Senior Member |
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Last weekend it happend to me, on the way back from Ohio. It was in the 80's
outside temp. The tanks where near empty. I do have the vent line to the
charcoal cannister blocked off because the cannister has a rusted off
bottom. It only made a big vaccuum leak for the engine. Do I have to get a
new cannister? Do I have to hook it back to the engine? What have others
done? I have not had vapor lock that I know of. Just don't like the bath I
got.
Gary W. Mills (Livonia MI)
. ___________
./_][__][] []| 1974 GMC M/H
.*O-------OO-* Painted Desert
"Tangerine Dream" W/New Frame
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org]On Behalf Of Richard
Sent: Sunday, July 25, 2010 8:33 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Heat stroke
[quote title=Steven Ferguson wrote on Sun, 25 July 2010 15:51]Steve,
Then you're gonna hate the answer!
It's not just the fuel lines, it's the tanks. At 9" above the
pavement, they get a lot of radiant heat. If you don't like waiting
for things to cool down, pull into the nearset filling station and add
some cooler fuel. This works well.
Then, when you get home, do the thing you hate
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Not sure how common it is, but when my buddy removed
his fuel cap at the gas station he got a bath of
hot gasoline.
--
Bukzin
1977 Palm Beach
Chico California
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1974 GMC 260
Tangerine Dream
Livonia Michigan
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| Re: [GMCnet] Heat stroke [message #93278 is a reply to message #93234] |
Mon, 26 July 2010 11:16 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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My coach had what I thought was a very bad case of vapor lock earlier this summer. I was surprised since I never really had a problem with it before in 100F temps. I discovered that the fuel line from the steel line on the cross member to the suction side of the pump had several perferations in it causing the pump to suck air. A 15 minute job and new fuel hose has totally solved what I thought was vapor lock.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Heat stroke [message #93303 is a reply to message #93283] |
Mon, 26 July 2010 13:30 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Bob:
Where did you get the new fuel hose?
Chip
""
I bought about 25 feet of it from Autozone a couple of years ago for various projects. I suspect there may be better choices out there now. I do recall that it was fuel injection hose rather than just the standard stuff.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Heat stroke [message #93315 is a reply to message #93259] |
Mon, 26 July 2010 14:48 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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Gary
If you have the line going to the canister blocked off it would be in your best interest to leave the fill cap a little loose so the tanks are vented to the atmosphere till you can replace that canister. The only problem venting it this way is you will likely smell some gas fumes but you won't damage your tanks.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Heat stroke [message #93321 is a reply to message #93315] |
Mon, 26 July 2010 15:24 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| roy1 wrote on Mon, 26 July 2010 13:48 |
Gary
If you have the line going to the canister blocked off it would be in your best interest to leave the fill cap a little loose so the tanks are vented to the atmosphere till you can replace that canister. The only problem venting it this way is you will likely smell some gas fumes but you won't damage your tanks.
Roy
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Roy, I did that when I thought I was having vapor lock issues and the resulting fumes screwed up my Imron paint around the fill tube--i don't think I got actual gas back up, but serious fumes.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Heat stroke [message #93333 is a reply to message #93321] |
Mon, 26 July 2010 16:18 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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I never had the fumes affect my Imeron paint that way but the stink of the fumes prompted me to fix the separator valve sooner rather then later. I'll bet the fumes would be even stronger where you live in Arizona.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Heat stroke [message #93339 is a reply to message #93321] |
Mon, 26 July 2010 16:59 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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It's not Imron, but my Topeka Graphics painted gas fill compartment has had
a wrinkle finish for about 5 years for the same reason. :-(
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Mon, Jul 26, 2010 at 4:24 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> roy1 wrote on Mon, 26 July 2010 13:48
> > Gary
> >
> > If you have the line going to the canister blocked off it would be in
> your best interest to leave the fill cap a little loose so the tanks are
> vented to the atmosphere till you can replace that canister. The only
> problem venting it this way is you will likely smell some gas fumes but you
> won't damage your tanks.
> >
> > Roy
>
>
> Roy, I did that when I thought I was having vapor lock issues and the
> resulting fumes screwed up my Imron paint around the fill tube--i don't
> think I got actual gas back up, but serious fumes.
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Heat stroke [message #93369 is a reply to message #93333] |
Mon, 26 July 2010 19:40 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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I was shocked since the paint has been almost indestructable. Fortunatley it has damaged only the inside of the fuel compartment and door.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Heat stroke [message #93393 is a reply to message #93335] |
Mon, 26 July 2010 21:42 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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Steve:
No I sure Don't but it should interchange with GM canisters in cars of the same era.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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