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So I fixed my fuel leak last night...
Posted by: MrChips ()
Date: November 01, 2012 11:40AM

After the high-revvin' trip to Palm Springs and back, the pump was loose again! All the vibration must have aggravated a leak on the outlet pipe (same place it was leaking from years ago on the original fuel pump, too!). That explains why my A/C pully is so clean - the fuel was keeping it nice and shiny as it dribbled off the pump hold down bolt. I wonder how much better my fuel mileage would have been without the drizzle.

Example of proper tool used for tight fuel line fittings...

<iframe width="420" height="315" src="[www.youtube.com]; frameborder="0" allowfullscreen></iframe>


Where Santiago and Live Oak Canyon intersect in Orange County, Ca

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Re: So I fixed my fuel leak last night...
Posted by: corventure Dave ()
Date: November 01, 2012 12:09PM

Indeed... get a "good" set of flare nut end wrenches. I have Snap-On but I'm sure there are others. Craftsman may be OK.... or at least they used to be. Mac should be good unz also.
Best to find out what isn't any good at home, instead of out on the road somewhere!

Thanks for the Video Chipps..... you always work in the dark??/ Har Hargrinning smiley

Corventure Dave

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Re: So I fixed my fuel leak last night...
Posted by: MrChips ()
Date: November 01, 2012 12:13PM

Trick or treat! Had to run to the store for an emergency apple-pie caramel apple from RockyMountainChocolateFactory..

Any excuse to take Live Oak Canyon, but once I know I have a leak as such, it must be repaired before going on such a spirited and twisty jaunt! The Kiddie remains so-far unused on the rear floor.


Where Santiago and Live Oak Canyon intersect in Orange County, Ca

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Re: So I fixed my fuel leak last night...
Posted by: corventure Dave ()
Date: November 01, 2012 12:16PM

One great thing about a Corvair with standard heating.....
If there is any notion of a oil or fuel leak in the engine comprtment.... just turn on the heater - defroster, and take a sniff!!!thumbs up

Corventure Dave

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Re: So I fixed my fuel leak last night...
Posted by: MrChips ()
Date: November 01, 2012 12:41PM

Umm..

wouldn't be much different for me ; no lower shrouds, and mufflers have a couple holes form bottoming out on my pal's car before he put the headers on.

IF I had it all to do over again, I would have sent all the sheet metal and such off to be tank-cleaned and powder coated. Cleaning that stuff took more time than anything else...


I should get back to work on my servo-actuators so I can install the shrouds and flapper doors again. Some heat this winter would be nice, but having a valve plate in the foot vent now will help tremendously!


Where Santiago and Live Oak Canyon intersect in Orange County, Ca

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Re: So I fixed my fuel leak last night...
Posted by: lowandslow ()
Date: November 01, 2012 02:37PM

I notice that you appear to still have the original screws that hold the pump together. I've never had a pump that didn't eventually spring a leak somewhere between the joints and trying to tighten the screws enough led to stripping the threads. So both my in-use and backup pumps have had the screws replaced with longer screws and locking nuts. This prpbably isn't your current problem but something to think about down the road.

Patrick McGhee
1963 Spyder convertible
Weatherford, Texas

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Re: So I fixed my fuel leak last night...
Posted by: azdave ()
Date: November 02, 2012 09:49AM

Line wrench issues?

If you use a good quality line wrench set and still bugger up the fitting then it's much more likely that the connection was over-compressed long ago and therefore each time you reconnect them you are forced to tighten them way too much to get them to be leak-free.

Quality line wrenches perform well at normal nut tightness but not at the tightness required to seal old connections that have been abused or disconnected many times through the years.

Each time you install those fittings they displace some amount of metal on the sealing area, especially if they are overtightened each time you put them back together. At some point you are no longer compressing the small circular sealing zone but are instead compressing material around the end of the steel tube which does little good. The sealing area of the brass flare will certainly deformed from overuse and then the installer is going to tighten even further to try to get it to seal.

Once you reach that point you really should replace the brass block and maybe even the steel lines. I have been successful in making small copper sealing gaskets that sit inside the tube flare and provide a malleable sealing disk that bridges the gaps. That really is a stop-gap measure but does work.

Someone told me NAPA used to sell flare gaskets but I haven't checked on that. I would NOT use this solution for brake lines but I'm happy with this fix for my 140 fuel lines.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: So I fixed my fuel leak last night...
Posted by: corventure Dave ()
Date: November 02, 2012 09:59AM

Good point azdave. I have also used these for pesky leaking lines. I got a bunch of them years ago. Don't know it they are still available. Have to take the time to check one day.
It is nice to have things like this on hand if ywe work on vehicles a lot!
I hate seeing gobs of teflon tape!!!!angry smiley

Corventure Dave

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Re: So I fixed my fuel leak last night...
Posted by: VegasVair ()
Date: November 02, 2012 11:05AM

And since there are always a few who don't know this,
Teflon tape on flare nut threads DOES NOT SEAL ANYTHING! eye rolling smiley

Flare nut threads cause pressure against the flare
on the end of the tube, but do NO SEALING themselves. eye rolling smiley

As corventure Dave said, gobs of Teflon tape look mighty ugly! sad smiley

65 Corsa 140/4 A/C convert.
CORSA+Vegas Vairs

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Sealing 1/4" Fuel line leaks at the fittings
Posted by: MattNall ()
Date: November 02, 2012 11:14AM

Grainger has them

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: Sealing 1/4" Fuel line leaks at the fittings
Posted by: davemotohead ()
Date: November 02, 2012 11:42AM

If you look at the vid he is talking about the fuel pipe threaded into the pump its self and not a flair end fitting,,Teflon tape will seal a pipe thread fitting,,and that is where he says it is leaking,,I am the only one paying attention???tongue sticking out smileygrinning smiley







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Sealing 1/4" Fuel line leaks at the fittings
Posted by: azdave ()
Date: November 02, 2012 11:59AM

davemotohead Wrote:
-------------------------------------------------------
I am the only one paying attention???tongue sticking out smileygrinning smiley


I was paying very close attention actually and replied about his frustrations with the line wrenches.I was not addressing the leak at the pipe thread. That is too easy to fix. I even had a subject line included showing I was adddressing the line wrench issue.

In the video he vented his frustrations several times about the flare nut wrenches rounding edges on the nuts so I explained why each owner or mechanic to work on those lines before him tightens them a little more each at repair and at some point the brass block and lines need to be replaced for a proper seal at normal torque values. The line wrenches are failing to work properly because the parts have been used past their expected life. The over-used parts are causing the issue that makes the line wrenches appear to fail at the task.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5






Edited 1 time(s). Last edit at 11/02/2012 12:00PM by azdave.

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Re: Sealing 1/4" Fuel line leaks at the fittings
Posted by: davemotohead ()
Date: November 02, 2012 12:19PM

Like I Said : "Is azdave and I the only ones Paying Attention???" smoking smiley

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Re: So I fixed my fuel leak last night...
Posted by: MrChips ()
Date: November 02, 2012 01:14PM

Heh- the lines were new, and had been tightened only once. The brass block was in great shape, too. I've seen the conical crush washers on some lines that were on an old Dodge truck.

I think I'll 'convert' those wrenches into some form of an art-project and keep an eye out for some Proto/Snapons at a garage sale.


Where Santiago and Live Oak Canyon intersect in Orange County, Ca

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Re: So I fixed my fuel leak last night...
Posted by: MattNall ()
Date: November 02, 2012 01:21PM

Hopefully it will be along time before you ever touch them again..


Have you ever checked your fuel pressure? I normally just hand tighten the Tee / nipple...never a leak..

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: So I fixed my fuel leak last night...
Posted by: azdave ()
Date: November 02, 2012 01:23PM

MrChips Wrote:
-------------------------------------------------------
> Heh- the lines were new, and had been tightened
> only once. The brass block was in great shape,
> too. I've seen the conical crush washers on some
> lines that were on an old Dodge truck.
>
> I think I'll 'convert' those wrenches into some
> form of an art-project and keep an eye out for
> some Proto/Snapons at a garage sale.

My bet is the brass block had the inner cone deformed and that required you to tighten the fuel lines during install past the normal torque required. Good quality wrenches are important of course.

I too have a set of those handy vise grip pliers for such occasions (like brake lines in the wheel wells).

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: So I fixed my fuel leak last night...
Posted by: lgoodwin ()
Date: November 02, 2012 01:48PM

FYI, o-rings do not help seal leaky fuel fittings either! Had one spring a leak at the club tune-up day at a member's car dealership, and nobody had any replacement parts. I had to get the car out of there and get home. Managed to get the leak down to a slow drip, and drove it home that way. Replaced the line with a good used one when I got home. I'd like to get some of those copper disc things for emergencies. What are they called at FLAPS?

<table align='center' width='0'>
<tr>
<td><img src='[www.automation-scs.com]; alt='1962 Corvair 900 sedan' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1967 Corvair Monza 140/4-speed' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1968 Corvair 500 coupe' width='190' /></td>
<td><img src='[www.automation-scs.com]; alt='1983 Mexican Mustang 5.0' width='190' /></td>
<td><a href='[www.automation-scs.com&]; target='_blank'></a></td>
</tr>
<tr>
<td align='center'><font size='1'>1962 900 sedan needs a home</font></td>
<td align='center'><font size='1'>1967 Monza 140/4-spd</font></td>
<td align='center'><font size='1'>1968 500 coupe (now my son's)</font></td>
<td align='center'><font size='1'>1983 Mexican Mustang 5.0</font></td>
</tr>
</table>

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Re: So I fixed my fuel leak last night...
Posted by: azdave ()
Date: November 02, 2012 01:56PM

lgoodwin Wrote:
-------------------------------------------------------
> I'd like to get some of those copper disc
> things for emergencies. What are they called at
> FLAPS?

I've only heard rumors that NAPA used to sell them. I've found them listed as copper flare gaskets. Mostly I see them for normal flares, not for inverted flares.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: So I fixed my fuel leak last night... 1/4" copper seals
Posted by: MattNall ()
Date: November 02, 2012 01:56PM

Flaps don't carry those... use my Grainger link!


Luke... next time wrap the FLARE with teflon...carefully.... it will work when all else fails...even on a cracked flare!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: So I fixed my fuel leak last night...
Posted by: MattNall ()
Date: November 02, 2012 02:06PM

azdave Wrote:
-------------------------------------------------------

> I've only heard rumors that NAPA used to sell
> them. I've found them listed as copper flare
> gaskets. Mostly I see them for normal flares, not
> for inverted flares.
===============================================


Actually GM / Mercedes MIGHT sell them... my '79 Eldo with Olds 350 / Bosch FI used them on all lines...1/8"!!

In industry...known as Nickle Seals...soft Stainless... used up to 5,000psi.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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