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Diesel Fuel Gel test - Pwr Srvc, Howe's, Schaeffer

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  #31  
Old 02-01-2010, 06:10 AM
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Interesting stuff.
Do you have some #1 diesel to try that out with?
.
Also, I'm seeing a mod possibility for those of you that have to live in those frigid conditions.
It would involve some real engineering, but if one could work out a way to have the pickup floating on the end of a lever similar in fashion to the fuel pickup, you could make sure that the only fuel getting to the engine no matter what temperature it is, is clear.
EDIT.
Maybe a wasted effort.
Once the truck is moving it would stir up all those wax crystals and mix it into the top half of the fuel anyway.
 
  #32  
Old 02-01-2010, 07:13 AM
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I wish we had a tank heater.

I was thinking it would be neat to modify some sorta heat probe for oil to the bottom of the tank to keep the fuel warm.
 
  #33  
Old 02-01-2010, 09:05 AM
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Rich, rep police have me locked up for now. Excellent work and great visual info. This should be very helpful for lots of folks.


Originally Posted by Kwikkordead
Interesting stuff.
...Once the truck is moving it would stir up all those wax crystals and mix it into the top half of the fuel anyway.
Yep... and like Rich said earlier, the agitation of moving also reduces the potential for wax crystal formation and helps redissolve those which are forming or have formed.

Originally Posted by Talyn
I wish we had a tank heater.

I was thinking it would be neat to modify some sorta heat probe for oil to the bottom of the tank to keep the fuel warm.
That would be good for startup conditions, but since diesel is more flammable than oil (especially synthetic oils), I would be seriously concerned about three issues:
1. creating a flammable condition,
3. managing a leak-proof penetration through the OEM double-wall polymer tanks.
2. potentially comprising the polymer tank's structural integrity with an external tank wrap, even though an external wrap would be safer from a flammability standpoint.

Metal tanks wold create a better potential, but once you're past the starup condition, you also already have the warmed fuel re-entering the tank through the fuel return line in addition to the agitation from the truck's movement.

Just a few thoughts.
 
  #34  
Old 02-01-2010, 09:11 AM
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Great post Rich!
 
  #35  
Old 02-01-2010, 09:34 AM
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Originally Posted by F250_
That would be good for startup conditions, but since diesel is more flammable than oil (especially synthetic oils), I would be seriously concerned about three issues:
1. creating a flammable condition,
3. managing a leak-proof penetration through the OEM double-wall polymer tanks.
2. potentially comprising the polymer tank's structural integrity with an external tank wrap, even though an external wrap would be safer from a flammability standpoint.

Metal tanks wold create a better potential, but once you're past the starup condition, you also already have the warmed fuel re-entering the tank through the fuel return line in addition to the agitation from the truck's movement.

Just a few thoughts.
I got OBS, so metal tanks.
but anyways.
I never thought about the return fuel being warm. Hmm. Guess you dont think of simple things sometimes.

And as far as I know, heat wont ignite diesel fuel unless your sticking a red cherry in there. EEP!
Otherwise the OBS fuel bowl heater would turn the fuel bowl into a fire bowl.
I belive the SD's have a bit different setup. My heater is removed. I actually dont have any issues with startup either. Specially in this cold weather we have been having.
 
  #36  
Old 02-01-2010, 11:21 AM
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You're right, but I wasn't thinking about the temperature from the heater being the ignition source. However, if there was ever any corrosion-induced electrical short, then that could lead to a different story.

Still, I'll admit that the chances of that are probably virtually non-existent, but I can't help but consider all the remote possibilities due to my safety training days in highly hazardous manufacturing processes where the freaky, odd, and even "impossible" situations do sometimes occur, and the potential impact of those situations can easily be of the magnitude of what happened in Bopal, India.
 
  #37  
Old 02-01-2010, 11:25 AM
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Originally Posted by Kwikkordead
Once the truck is moving it would stir up all those wax crystals and mix it into the top half of the fuel anyway.
How about some type of mixing device that would stir up the fuel before starting the fuel pump on cold days?
 
  #38  
Old 02-01-2010, 01:07 PM
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Originally Posted by Talyn
I wish we had a tank heater.

I was thinking it would be neat to modify some sorta heat probe for oil to the bottom of the tank to keep the fuel warm.
Hot Fox In-Tank/In-Line Fuel Warmer with Shut-Off Thermostat - PartsSystems

I just put one of these in my semi, since it's cold blooded and I can't seem to get additive to work as well as I want. So far it seems to work, but I should probably put one in the other tank so they are both heated. Don't know if they make them for pickups. But I've never had a problem with my pickup gelling, knock on wood...
 
  #39  
Old 02-01-2010, 01:12 PM
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Just wrap your tank in an electric blanket.
 
  #40  
Old 02-01-2010, 01:50 PM
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Regulated return is the best solution to gelling I have found.

After I did the pre-pump & in tank, I would gel any time it got below 10*. After the regulated return I've had no gel issues at any temperature down to -24*.
 
  #41  
Old 02-01-2010, 02:07 PM
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Originally Posted by Kwikkordead
Interesting stuff.
Do you have some #1 diesel to try that out with?
.
Sure can, but I will have to wait a week or so untill we get some colder temps again. We are having a heat wave this week (+15F to +25F).

Originally Posted by clux
Regulated return is the best solution to gelling I have found. After I did the pre-pump & in tank, I would gel any time it got below 10*. After the regulated return I've had no gel issues at any temperature down to -24*.
Probably why I have been so fortunate myself this winter.
 
  #42  
Old 02-01-2010, 02:15 PM
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Originally Posted by white Buffalo
Sure can, but I will have to wait a week or so untill we get some colder temps again. We are having a heat wave this week (+15F to +25F).
Shirtsleeve weather, Huh?
 
  #43  
Old 02-01-2010, 02:26 PM
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Originally Posted by clux
Regulated return is the best solution to gelling I have found.

After I did the pre-pump & in tank, I would gel any time it got below 10*. After the regulated return I've had no gel issues at any temperature down to -24*.

That makes sense as long as you're running, but how would simple plumbing affect the gel point in your tank once the truck is shut down and not running at all for hours on end? Or are you suggesting that with the RR, you can get a circulating effect by using your block heater in winter and having that little bit of warmth transfer all the way through the bolck to the fuel rails and cause a circulation flow through the fuel system (a flow that would have to be strong enough to push up the suction leg of the pump suction line, through a filter, through pump internals, and then upwards from the truck frame rails through the fuel rails and fuel pressure regulator)?
 
  #44  
Old 02-01-2010, 02:28 PM
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Originally Posted by F250_
That makes sense as long as you're running, but how would simple plumbing affect the gel point in your tank once the truck is shut down and not running at all for hours on end? Or are you suggesting that with the RR, you can get a circulating effect by using your block heater in winter and having that little bit of warmth transfer all the way through the bolck to the fuel rails and cause a circulation flow through the fuel system?
I think it was removing the mixing chamber and diverting the return fuel away from the pickup.
 
  #45  
Old 02-01-2010, 02:46 PM
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That makes sense, but I did the same thing when I used the ITP in-tank/pre-pump filter kit.

Still, though, that only works while you're running because it only addresses the benefit of circulating agitation within the tank as a whole instead of only at the pump suction foot. Once you're truck is down for the night, you still should use something else to maintain fuel fluidity so that it will flow on startup in the morning.
 


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