Forums General Discussion Fuel Line Fabricators? Re: Fuel Line Fabricators?

#70197
unabated
Participant

I rewired my engine last winter. No electric fuel
pump.
ap

— Robert Fine <> wrote:

I’ll take a picture tonight and send it along.

On Tue, Jun 17, 2008 at 5:32 AM, alan P
<> wrote:

I am not sure all of us have an electric pump. I

know

I don’t (w58). I have one purchased but not

installed

(Walbro).
ap
— Robert Fine <> wrote:

They do corrode if not cared for – in some

engines

(maybe even ours) they’re
aluminum or an aluminum alloy that just due to

the

fact they’re in a damp
area and in contact with a bazillion other

metals

corrode.

Secondly, repeated bleeding with excessive force
will maul the tubing
surface resulting in a leak that requires more
torque to seal, creating more
leakage… until in an effort to stop the leak

the

nut cracks.

The torque specs for those tubes are in the

inch-lb

range, not foot-lb. The
sealing surface is very narrow. The reason

those

tubes are as soft as they
are is so that they (ostensibly the least

expensive

part) are the ones to
fail, not the expensive fittings on the

injectors or

fuel pump.

Finally, between the lift pump and manual pump

it

should be an extraordinary
circumstance to need to bleed the injector

lines.

Once the main injector
pump is primed it will fill the lines.

Sometimes it

requires using the
compression release (if we have one – I haven’t
looked) so you can spin the
engine fast enough.

If the lift pump on the side of the engine isn’t
working, the engine may
still run ok, but you won’t be able to prime it
properly. I know that when
I change my filters, I let that pump run for a

bit

until it stops (you
should hear clicking which eventually stops or

slows

considerably). Then I
roll over the engine for a bit and it usually
starts. It’ll run rough for a
few seconds and then all will be well. Perhaps,

in

this, I’m amazingly
lucky.

Bob

On Tue, Jun 17, 2008 at 5:09 AM, Paul Lefebvre
<>
wrote:

Showing my lack of experience with these

engines,

why do the fuel injector

lines need replacing. Is it due to corrosion

of

the line or because they

will no longer seal because of repeated

opening

and tightening to bleed the

lines. If it is the latter, that makes the

case

for an external fuel pump

pretty strong.

Paul


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Bob Fine
Fine Software LLC
Your data on the web your way. No kidding


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Fine Software LLC
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