Parker push-lock hose

Jonnydime · Feb 14, 2018

I swapped the dual fuelers around on my trucks and when I inspected the hose I was using to feed the hpfp’s I noticed it was cracking and beginning to deteriorate. The lines are 3 years old and have around 40,000 miles on them. I will be installing braided stainless this time.

Just an FYI.

DEEZUZ · Feb 14, 2018

Good find. We're you getting hose debris in the filters?

8WR_ZJ · Feb 14, 2018

Was the hose diesel fuel rated? That is pretty scary to see it like that!

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Jsexton · Feb 14, 2018

Thanks for the heads up... not many miles for that to already be happening... on my truck I've been wanting to do the stainless steel hoses for the fuel lines on my dual pumps also...I hope I don't sound too stupid.... iam still new to all this trying to learn as much as I can to do my own work on my truck....but anyways back to my question are you making up you own fuel lines are you having pre made lines...

morefuel · Feb 15, 2018

I could be wrong but I don't think stainless braided lines is going to fix that problem.

DEEZUZ · Feb 15, 2018

Right, it all depends what inside the stainless

Jonnydime · Feb 15, 2018

morefuel said:
I could be wrong but I don't think stainless braided lines is going to fix that problem.

I took the hose to my Parker store and they told me the same thing. They ended up selling me marine fuel line.

Jonnydime · Feb 15, 2018

CTC DEEZUL said:
Good find. We're you getting hose debris in the filters?

Nope. I think I cought it in time what made me question the liner was the fact that when I went to move the lines I could feel them crack.

Jonnydime · Feb 15, 2018

8WR_ZJ said:
Was the hose diesel fuel rated? That is pretty scary to see it like that!

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It’s supposed to be.

DEEZUZ · Feb 15, 2018

I imagine this might be the same stuff thats piled in with all those go fast race pumps too....

5 oh · Feb 15, 2018

I had a similar issue with the same Parker push lock hose on my fuel system after a year and a half it started to dry rot bad anywhere it was exposed to heat so I replaced all of it and insulated the best I could.

DieselJpower · Feb 15, 2018

Parker 801 I assume ? I just chopped open a 2 year old piece of 836 (high temp) and it still looks like new on the inside

Jonnydime · Feb 15, 2018

Two years ago when I had the top end apart for rockers the lines were fine. According to the specs it should have no issues. These were feed lines not returns and I know for a fact my fuel never got over 150 degrees.

Strokersace · Feb 15, 2018

I had Gates hoses do that even though they were supposedly rated for diesel.

The only Parker hose I'll use is 836. Only comes in blue. It has the highest temp and pressure ratings of any.

Even though the fuel inside may not be more than the max temp, the ambient temperature of the engine bay and components the hoses pass by is likely greater. That was my justification. In the 6 to 7 years I ran them I never experienced Ford hat you have.

Tree Trimmer · Feb 22, 2018

yup, 836 here to.

6.4 Stroker · Feb 26, 2018

Good catch, I need to replace mine.

Jonnydime · Feb 26, 2018

It was only the hose with diesel flowing through it that did this. I used this hose for the water cooling of my turbos as well as the turbo drains and neither showed this kind of degradation.

Tree Trimmer · Feb 26, 2018

Sounds like you got a mixed up hose from your parker store.

Cuz if you could put coolant through it and it's fine but the diesel made it crack, I don't think you got a diesel rated hose. Especially if it only took 2 years for it to happen.