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Old 09-13-2012, 04:06 PM   #1
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Renewing Fuel system

Hi all,

in the ongoing and seemingly everlasting renovation of our Bounder its time to replace the fuel lines for both engine and generator.. hard and flexi..

Just a quick question regarding the flexible stuff..

I know you have to have some flexible links to allow for chassis flex and inclusion of inline fuel filters (which ours has along a chassis rail) but we also have a couple of seemingly pointless flexible parts of about 1-2 inches no where near any filter or moveable parts.. just sitting along the main run along the chassis rail about mid way along..

Would it be ok to remove these two extremely short flexi parts and just make one nice long run of new hard line? Obviously keeping the flexible pipe from the hard line to the carb connection and flexi up to the main fuel pump and filters??

Also where the line goes up from the chassis upto the engine & carb it remains flexible from the bottom running fairly close to the back of the engine (ford 460) then connects to the hard line feed of the holley..

Would it be ok/acceptable to lengthen the hard line closer/up to the carb feed and wrap it in heat shield stuff? seems to me that the flexible close to the engine maybe a potential source of fuel vaporization ..




Thanks in advance for any advice and info..
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Old 09-13-2012, 06:20 PM   #2
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Quote:
Originally Posted by Shore2Shore View Post
Hi all,

in the ongoing and seemingly everlasting renovation of our Bounder its time to replace the fuel lines for both engine and generator.. hard and flexi..

Just a quick question regarding the flexible stuff..

I know you have to have some flexible links to allow for chassis flex and inclusion of inline fuel filters (which ours has along a chassis rail) but we also have a couple of seemingly pointless flexible parts of about 1-2 inches no where near any filter or moveable parts.. just sitting along the main run along the chassis rail about mid way along..

Would it be ok to remove these two extremely short flexi parts and just make one nice long run of new hard line? Obviously keeping the flexible pipe from the hard line to the carb connection and flexi up to the main fuel pump and filters??

Also where the line goes up from the chassis upto the engine & carb it remains flexible from the bottom running fairly close to the back of the engine (ford 460) then connects to the hard line feed of the holley..

Would it be ok/acceptable to lengthen the hard line closer/up to the carb feed and wrap it in heat shield stuff? seems to me that the flexible close to the engine maybe a potential source of fuel vaporization ..




Thanks in advance for any advice and info..
I think you will find the flexible line is less likely to transfer heat to the fuel, than a metal/"hard" line and would therefore be less likely to cause a vapor lock. whatever you decide ensure there is sufficient travel allowed when the engine exerts torque, insufficient will cause damage and present a possible fire hazard. good luck whatever you decide
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Old 09-13-2012, 06:42 PM   #3
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Keep in mind that the flex hose to the motor should have enough slack to survive the engine moving as much as 6 inches up in the event of a broken motor mount. It does happen.
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Old 09-13-2012, 09:39 PM   #4
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Never thought about it needing to flex that much incase of an engine mount brake or even how far an engine can move due to torque..

Upon looking at the extensive parts list catalog that came with our rig from john deere it shows the hard and flex fuel line/s with the mentioned small sections.

So thinking about it and the advice will just put it all back as it is with the new hard pipe.

Thank you for the hints and advice ... will look all good once in place with new filters, hard line and flexi along with the new fuel pump too..
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