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-   -   What's way to repair plastic fuel lines (http://www.peachparts.com/shopforum/diesel-discussion/391265-whats-way-repair-plastic-fuel-lines.html)

Junkman 01-31-2018 01:36 PM

What's way to repair plastic fuel lines
 
There are several plastic fuel lines on a 617. For example from the primer pump to the fuel filter housing. Some of those lines are starting to weep. What's the fix?

A source for replacement lines isn't obvious.

dkr 01-31-2018 02:41 PM

If it's just plastic, you should be able to get replacements at Home Depot or Lowes. I'm not sure why you couldn't replace them with rubber.

Dkr.

NZScott 01-31-2018 03:22 PM

Cut them off at the nipples leaving the plastic on the nipple itself, and install 5/16" hose onto that.

Diesel911 01-31-2018 03:28 PM

People have done as NZScott said and others like myself removed the Plastic entirely and replace it with Hose. But, I thought others said to use 3/8 hose when you leave the plastic on the nipple.

However, descriptions are in the repair links.

The Trick is to heat the plastic with butane lighter just enough to soften it and they grab the unheated portion of the line and yank the plastic tube off.
Also remember if you heat the plastic tube the banjo also gets hot. you can use a pliers with tape on the jaws to hold the banjo part.

Diesel911 01-31-2018 03:30 PM

Quote:

Originally Posted by dkr (Post 3784841)
If it's just plastic, you should be able to get replacements at Home Depot or Lowes. I'm not sure why you couldn't replace them with rubber.

Dkr.



Not all plastic or plastic looking lines can hold up with warm diesel fuel inside of them.

dkr 01-31-2018 04:43 PM

So why not just replace it with rubber fuel lines? Is there something I am missing?

Dkr.

vstech 01-31-2018 07:06 PM

Quote:

Originally Posted by Diesel911 (Post 3784852)
Not all plastic or plastic looking lines can hold up with warm diesel fuel inside of them.

I have sussessfully replaced it with Clear pvc hose from Home Depot. Works fine.

You can also get replacement lines ordered from the dealer...

But yeah, rubber fuel line works well too, but ya canít see through it to check for bubbles etc...

Junkman 01-31-2018 10:02 PM

Quote:

Originally Posted by Diesel911 (Post 3784852)
Not all plastic or plastic looking lines can hold up with warm diesel fuel inside of them.

That's what I was thinking.

I didn't want to have to make standard hose fit and and search for proper clamps if it was easy to find a suitable plastic hose that would simply push on and not leak.

I remember years ago dealing with a gravity feed water system in rural TN. Poly butyl pipe ran along the ground to the holding tank and was used to plump the house. That stuff always leaked. The joint where the male connector was forced into the pipe weakened the pipe wall and it eventually leaked. The leak would either make a mess &/or allow air into the system which would require priming the pump and bleeding the air - pretty inconvenient especially in the winter.

Diesel911 01-31-2018 10:36 PM

Quote:

Originally Posted by Junkman (Post 3784931)
That's what I was thinking.

I didn't want to have to make standard hose fit and and search for proper clamps if it was easy to find a suitable plastic hose that would simply push on and not leak.

I remember years ago dealing with a gravity feed water system in rural TN. Poly butyl pipe ran along the ground to the holding tank and was used to plump the house. That stuff always leaked. The joint where the male connector was forced into the pipe weakened the pipe wall and it eventually leaked. The leak would either make a mess &/or allow air into the system which would require priming the pump and bleeding the air - pretty inconvenient especially in the winter.

Someplace in the Repair Links are examples of what others have used.
Fast navigation http://www.peachparts.com/shopforum/diy-links-parts-category/146034-fast-navigation-do-yourself-links.html

Might be some info here: Source of tygothane plastic line
http://www.peachparts.com/shopforum/showthread.php?p=2579258#post2579258

The problem with the hard plastic line is that it is difficult to push the banjo end into the line.

R-3350 02-01-2018 02:32 AM

the plastic lines are 8X1mm PA12 nylon you can cut the old ones off the barbs and re-do them with new line and pinch clamps. i ordered 10 feet of PFA teflon 8X1 line and a pack of 5/16 to 3/8 pich clamps from Mcmaster to do mine. the PFA line is resistant to all fuels and chemicals and will never degrade. https://www.mcmaster.com/#52545k42/=1bdkibs https://www.mcmaster.com/#5733k76/=1bdkimi

optimusprime 02-01-2018 05:46 AM

Try shrinkwrap . Its a plastic tube you heat up ,,and it contracts on to existing fuel line.Only thing is feeding it on first before heating it up with hairdryer ..

Diseasel300 02-01-2018 09:37 AM

Quote:

Originally Posted by optimusprime (Post 3784958)
Try shrinkwrap . Its a plastic tube you heat up ,,and it contracts on to existing fuel line.Only thing is feeding it on first before heating it up with hairdryer ..

Try it on your car and tell us how well it works. I'm sure you'll be back within the day.

Seriously though, bad idea. Shrink tubing softens with heat, even the heat that's available in the engine bay.

OM617YOTA 02-01-2018 10:17 AM

5/16" Gates Barricade fuel line and hose clamps, has lasted the last 40k or whatever miles I've put on my swap with no issues.

Are you current hoses clear enough to see air through? Of course not.

Diesel911 02-01-2018 01:57 PM

Quote:

Originally Posted by Diseasel300 (Post 3784971)
Try it on your car and tell us how well it works. I'm sure you'll be back within the day.

Seriously though, bad idea. Shrink tubing softens with heat, even the heat that's available in the engine bay.

Not to mention what happens to shrink tubing when it gets exposed to Oil or Diesel Fuel.

jake12tech 02-01-2018 02:47 PM

The way to fix them is replace them. Just go to home depot and get some rubber hose is your best bet.


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