1994.5 - 1997 7.3L Power Stroke Diesel  

Diesel Powered Coolant Heater install

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Old 11-24-2012, 11:00 PM
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Diesel Powered Coolant Heater install

Sourcing out either a Webasto OR Espar heater for my 1996 F250 7.3..... Webasto makes a "generic" kit for their produce, but nothing vehicle specific... Has anyone on this site installed or knows how to tie into the fuel system properly??? I know that I have to tie into the Fuel system BEFORE the In-Frame pump, just don't know how to do so in a SAFE manner..... The initial lines coming from the tank to the pump are a plastic/ rubber material, can I just use a "T" type fitting (not sure what material will be Diesel safe) and tie into the feed line to the pump??

I'm afraid if I tie into the lines after the pump, either the excess fuel pressure will blow the connection apart, or the fuel pressure will damage the fuel pump/system in the Heater itself... Any ideas or tips guys???

Thanks and cheers!!!!!!!!
 
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Old 11-24-2012, 11:09 PM
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Does the heater have its own fuel pump
 
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Old 11-24-2012, 11:26 PM
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Originally Posted by fordman67
Does the heater have its own fuel pump

Yes it does !!!!!
 
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Old 11-24-2012, 11:34 PM
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Hmm,i believe i might put it in the return line
 
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Old 11-24-2012, 11:40 PM
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Originally Posted by fordman67
Hmm,i believe i might put it in the return line
Putting it into the return line? will the little pump then have to not ust pull through the main pump of the truck... but the fuel filter, and the rest of the tubing to get to the return line???

Would that not stress the pump a little too much??? Its just a little plunger pump, dont know if it will be able to have enough strength to go through all the lines completely through the fuel system...

I could be wrong though... Thanks for your reply!!!!
 
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Old 11-25-2012, 07:24 AM
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If you have a stock fuel system, it works like this.


Tank>pump>Fuelbowl>pump>heads>return>tank...

The mechanical pump on the OBS pulls fuel from the tank at low pressure and sends it though the fuel bowl. Then creates a bit more pressure sending it though the fuel pump a second time and then off to the heads.
 
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Old 11-25-2012, 09:13 AM
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I was figuring on using it when engine running
If not then t into main line after switcher valve and it will pull out if wich ever tank u were using.i would not want the engine pump to have to compete for fuel when running.the heater would be working hard.
 
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