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Old 10-30-2018, 08:17 PM   #31
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Is the metal part a straightforward 'T' (although not actually shaped like a 'T') or does it have any fancy innards? ie could it be a one way valve or possibly a venturi or something equally as obscure?

Keith.
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Old 10-30-2018, 08:20 PM   #32
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Quote:
Originally Posted by Cheyenne View Post
Is the metal part a straightforward 'T' (although not actually shaped like a 'T') or does it have any fancy innards? ie could it be a one way valve or possibly a venturi or something equally as obscure?

Keith.
Its just a tee, straight through. On the OM647, the fuel is directed either straight to the tank, or through the fuel cooler coils. This tee combines the return from the coils, or straight from the thermostatic valve, with the downstream end going to the fuel tanks return pipe.

The unusual shape is likely due to the tight space in which all this plumbing is packed.
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Old 10-30-2018, 11:37 PM   #33
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Default Re: Fuel Tank Coil Rusty Wye Fittings

So I've been carrying around a part that won't fit?!?!?!?

Damn!

Sorry for any misinformation about parts, but it's what I was supplied from the Dodge dealership.

One of the reasons that I have yet to replace the 2004 crusty looking fittings was that the access and parts change looked to be a bit of a pain.

One answer to the problem is to use 3 ea. long(er) hoses and route the fuel hose out to a traditional Tee fitting. Alternatively, it looks like either a Wye or Tee fitting should install on 2 legs with no problem. A long hose loop can be used for the leg that doesn't align properly.
Added:
If OEM isn't possible, and the long hose loop method is necessary, 3/8" barb Tee fitting are more common locally than are Wye fittings.
Additional reflection:
It may make sense to install an equal leg Y fitting in a backwards facing orientation. That should allow the loop hose to fit into the space available and maybe use less hose.


JB Weld will seal the hole shown center in the previous post picture, and also the other hole in progress up by the white dot.

Please let us know if the removed part is 5/16"... 3/8" or some other SAE equivalent size.

Anyone want to buy some brand new, unused OEM packaged dealership fuel parts for their T1N Sprinter?

vic

If it is 5/16"

https://www.amazon.com/Saim-Brass-Ba.../dp/B01LYZ81BC

3/8"

https://www.amazon.com/Uxcell-a15042.../dp/B00YX8WAV2

Jegs carries some parts.
https://www.jegs.com/i/NOS/741/15534/10002/-1

Every Jegs web page contains this note. Be aware.
"Some parts are not legal for use in California or other states with similar laws / regulations"

This picture shows the possible alignment for 2 ea. legs.
RustedFuelCoolingPartsTop.jpg
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Old 10-31-2018, 12:03 PM   #34
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Quote:
Originally Posted by Aqua Puttana View Post
Alternatively, it looks like either a Wye or Tee fitting should install on 2 legs with no problem. A long hose loop can be used for the leg that doesn't align properly.
That's my plan if an oem replacement doesn't exist (is that normal?!) I'll post pics if I have to take that route.

Quote:
Originally Posted by Aqua Puttana View Post
Please let us know if the removed part is 5/16"... 3/8" or some other SAE equivalent size.
The widest part of the nipple measures just under 7/16", so I'm assuming that's designed for a 3/8" ID hose... which means the 12 1/2" hose clamps I just bought aren't going to work.
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Old 10-31-2018, 12:39 PM   #35
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Quote:
Originally Posted by Theodore View Post
That's my plan if an oem replacement doesn't exist (is that normal?!) I'll post pics if I have to take that route.

...


You wouldn't think so.

I'm going out today to smear more wheel bearing grease on the 2004 and 2006 fittings.

(For those wondering, the grease has not adversely affected the hoses.)

Thanks for the follow-up.

vic

Added:
Thought that I noticed something, but it didn't pan out.

Quote:
Originally Posted by Aqua Puttana View Post
Off topic.

Quote:
Originally Posted by DesertAdventures View Post
Thanks again everyone.

Found the original zip ties here

http://mbepc.net/3/fg/208cdi/62a/901612/0/47/040/

...
I wonder if part #56 in the diagram is the proper Wye fitting part for the T1N cooler coil fittings that rust out?
Nope.
Parts descriptions. (Didn't notice the scroll down.)

#56 = A 000 835 06 32 CONNECTION - ONLY WITH AUXILIARY HEATER

#58 = A 004 997 01 90 CLAMP - ONLY WITH AUXILIARY HEATER 9.8-12.3 MM KL1
(Too small size. NAS aka NAFTA OM647 [rusted] Fuel Wye would likely need a 13-14.5 MM clamp.)


Fuel Tank Coil Rusty Wye Fittings
https://sprinter-source.com/forum/sh...ad.php?t=20885

vic
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Old 05-22-2019, 03:14 PM   #36
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Default Re: Fuel Tank Coil Rusty Wye Fittings

A 5/16" WYE fitting possibility.

Unfortunately the description doesn't match the brass part shown in the pic. [Oops. I guess it does. "for plastic tubing", not a plastic fitting.] I haven't contacted the vendor.

https://northwoodsoutlet.com/product...6-tubing-12pk/

WyeFitting.jpg

vic

Added:

Plastic wouldn't be a problem as long as the angle of the one leg is as pictured. It is important that two legs are basically in line with the tap leg coming off at the approx 45 degree angle. Added: I've noticed that the style of fitting is sometimes referred to as a "branch" fitting. The fitting style is fairly common in vacuum fitting listings, but unfortunately the ones I've found are all smaller diameter sizes.
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2006 Freightliner 140 2500HC >172,000+ mi. Arctic Whitewash (Spotted Snow Leopard accents)
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Anyone can hold the helm when the sea is calm. Publilius Syrus
"There are only 10 types of people in the world: Those who understand binary, and those who don't." HaWiiLuVeR
16 ounces of unnecessary prevention can be worth a pound of manure.

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Old 05-22-2019, 04:59 PM   #37
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Default Re: Fuel Tank Coil Rusty Wye Fittings

B100 may degrade some hoses, gaskets, seals elastomers, glues and plastics with prolonged exposure. Natural or nitrile rubber compounds, polypropylene, polyvinyl, and Tygon materials are particularly vulnerable. More testing is being done to extend this list of vulnerable materials. Most elastomers used after 1993 are compatible with B100 (Viton/Teflon). Before handling or using neat biodiesel (B100) contact the equipment vendor to determine compatibility with fatty acid methyl esters.
Teflon, Viton, and Nylon have very little reaction to biodiesel and are among the materials that can be used to update incompatible equipment. B100 suppliers and equipment vendors should be consulted to ensure the most recent findings on compatibility. For the bulk fuel handlers of biodiesel it is highly recommended to speak with your hose suppliers to source hoses that are compatible with neat biodiesel.
Most tanks designed to store diesel fuel will be adequate for storing B100. Acceptable storage tank materials include aluminum, steel, fluorinated polyethylene, fluorinated polypropylene, Teflon, and most fiberglasses.
Red Metals; Brass, bronze, copper, lead, tin, and zinc may accelerate the oxidation process of biodiesel creating fuel insolubles or gels and salts. Lead solders and zinc linings should be avoided, as should copper pipes, brass regulators, and copper fittings. Affected equipment should be replaced with stainless steel, carbon steel, or aluminum.
B20 Material Compatibility
Biodiesel blends of 20% or less have shown a much smaller effect on these materials. The effects are virtually non-existent in low-level blends such as B2. When handling blends of B20 or less normal monitoring of hoses and gaskets for leaks is sufficient.
Blends of B20 and lower reduce the impact of metal compatibility issues.
Materials Compatibility Studies
The following summaries on material compatibility with biodiesel (methyl Oleate) are taken from research studies and compatibility guides from several o-ring and seal manufacturers.
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Old 05-22-2019, 05:25 PM   #38
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Thanks for the info.

Quote:
Originally Posted by CJPJ View Post
[FONT="Arial"] B100 may degrade some hoses, gaskets, seals elastomers, glues and plastics with prolonged exposure. ...
Those using B100 should be concerned.

This 2005 paper indicates that for B5 and even B20 blends there is little to worry about... in my interpretation/opinion. Of course the study is on a government site so some will quickly discount the value.

2005 was prior to the changes in 2012 to the USA Vehicle Bio Fuel regulations. It was ok prior to those improvements.

BioFuelMaterials39130.pdf


Impact of Biodiesel on Fuel
System Component Durability
FTC 2005.01 September 2005
https://www.nrel.gov/docs/fy06osti/39130.pdf

vic
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Old 05-28-2019, 04:19 PM   #39
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Default Re: Fuel Tank Coil Rusty Wye Fittings

I just spoke to someone at Northwoods outlet about the above 5/16" y fitting.
Even though it looks to be brass in the picture, it is actually black plastic.
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Old 05-28-2019, 05:00 PM   #40
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Default Re: Fuel Tank Coil Rusty Wye Fittings

Quote:
Originally Posted by tinkerric View Post
I just spoke to someone at Northwoods outlet about the above 5/16" y fitting.
Even though it looks to be brass in the picture, it is actually black plastic.
Thanks for the follow-up and info.

Plastic wouldn't be a problem as long as the angle of the one leg is as pictured. It is important that two legs are basically in line with the tap leg coming off at the approx 45 degree angle. Added: I've noticed that the style of fitting is sometimes referred to as a "branch" fitting. The fitting style is fairly common in vacuum fitting listings, but unfortunately the ones I've found are all smaller diameter sizes.

The Dodge replacement is plastic, but too small (1/4" size) and a standard leg Wye fitting.

The 5/16" diameter may be slightly smaller than desired, but a new hose should clamp down and seal over 5/16".

vic
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DAD NAS (N. Amer. Spec) 2004 140 2500 >326,000+ mi. Arctic Whitewash Brush-tone Grey
2006 Freightliner 140 2500HC >172,000+ mi. Arctic Whitewash (Spotted Snow Leopard accents)
"My opinion and worth everything you'll never pay for it." assumed.
Anyone can hold the helm when the sea is calm. Publilius Syrus
"There are only 10 types of people in the world: Those who understand binary, and those who don't." HaWiiLuVeR
16 ounces of unnecessary prevention can be worth a pound of manure.

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