Spinoff: does the FICM need to be cooled, or can it be bypassed?
- Thread starter MMLMM
- Start date
Thats one of the reason I've not done this is LB7 injector life. Who knows if it will or wont effect life span. I agree also with the use of return fuel as the coolant agent specially when your tank is well below 1/2 full especially with ambient temperatures in the 80's and above.
I know some have done it with success but are they daily drivers? I believe the data is to inconsistent to rely on IMO. If someone wants to warranty my injectors then I'm on this like a pack of pigeons on a single french fry in Mcdonalds parking lot!
How bout a huge fuel coolers to help cool the fuel off more? Also I don't have the heater anymore my fuel temps are pretty cool this time of year have to see what it does in the summer? I could easily do this for the time being summer time would be The issue
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GMC_2002_Dmax
The Still Master
I guess I am confused, fuel is 210 degrees, internal temps of the engine are 210 degrees, cylinder temperatures are 1600-2000 degrees running hard ?
What percentage of trucks out there running are having FICM failures ?
What percentage of trucks with good filtration and running proper lubrication-additives in the fuel are having failures ?
Fuel temps are higher after the CP3, with less fuel in the tank there is less less volume to cool.
The radiator has a oil cooler, trans cooler and in the winter we can completely block the front and not overheat the engine.
My LBZ has a grill cover and a plow running down the road and it doesn't overheat.
I think other than the fuel pressure ballooning the case I would rather have return fuel than no fuel cooling it.
I don't see the need for a elaborate set-up for a FICM, you would need a circulation pump, a stack or radiator and a fluid that would work to cool the electronics, I would not trust water/antifreeze, JMHO.
What percentage of trucks out there running are having FICM failures ?
What percentage of trucks with good filtration and running proper lubrication-additives in the fuel are having failures ?
Fuel temps are higher after the CP3, with less fuel in the tank there is less less volume to cool.
The radiator has a oil cooler, trans cooler and in the winter we can completely block the front and not overheat the engine.
My LBZ has a grill cover and a plow running down the road and it doesn't overheat.
I think other than the fuel pressure ballooning the case I would rather have return fuel than no fuel cooling it.
I don't see the need for a elaborate set-up for a FICM, you would need a circulation pump, a stack or radiator and a fluid that would work to cool the electronics, I would not trust water/antifreeze, JMHO.
SO.... isnt that what you said to do run the return outta the cp3 to the in then back out to the normal return? my truck with cover on doesnt get over 180 going 80 down the freeway an only gets to like 160-170 around town? with or with out cover? i can run my truck hard as hell my ficm is col to the touch with fuel flowing threw it first then to the pump.. Also what everyone say to much fuel pressure from the pump is? 15psi? i think mines runnign in the 10-15psi range have to get a gauge put in and see
IMO i dont seeing it as a bad idea useing a seperate cooler, circ. pump, and useing dexcool with a 60/40 mix unless osmeone has some good knowlege on why dexcool would be bad i can understand of removeing it from the fuel system to make it one less restriction the only thign od finding the right circ pump. but im not a seasoned diesel tech so
GMC_2002_Dmax
The Still Master
That is what I was saying, use the return fuel to cool it, underhood temps in the summer negate the fuel temp difference even if it is 200 degrees return fuel temps. A liquid will cool off 300 degree electronics with heat transfer.
I don't know of many people who have had a FICM go bad, it just doesn't seem to be that they are failing.
There is concern once fuel pressures go over 10 or so psi, this was reported years ago.
I just do not see the need to re-invent the wheel.
I guess some questions are being answered slowly but surly
My point of this thread was this:
Many people relocate the FICM.
After relocation, does it need to be cooled???
If not then happy relocating...
The other concern is A) people running lift pumps, get the FICM leaking, and B) peopel want to bypass the fuel thru it for whatever reason.
Now...If you bypas sit, we go back to cooling? Does it need to be cooled? If so you cant use fuel now because you bypassed it. So will a standaone system work to do this?
Tonys idear was to use return fuel, I think its too hot but maybe not. If it is, again, would a stand alone system work? Be worth it?
My point of this thread was this:
Many people relocate the FICM.
After relocation, does it need to be cooled???
If not then happy relocating...
The other concern is A) people running lift pumps, get the FICM leaking, and B) peopel want to bypass the fuel thru it for whatever reason.
Now...If you bypas sit, we go back to cooling? Does it need to be cooled? If so you cant use fuel now because you bypassed it. So will a standaone system work to do this?
Tonys idear was to use return fuel, I think its too hot but maybe not. If it is, again, would a stand alone system work? Be worth it?
I think ill try it for a day or two see how hot the ficm gets with it to teat out what Tony has said works
I suddenly feel like your Ginny pig :hug: lol jk ill let you know when I get time to do it :thumb:
I guess some questions are being answered slowly but surly
My point of this thread was this:
Many people relocate the FICM.
After relocation, does it need to be cooled???
If not then happy relocating...
The other concern is A) people running lift pumps, get the FICM leaking, and B) peopel want to bypass the fuel thru it for whatever reason.
Now...If you bypas sit, we go back to cooling? Does it need to be cooled? If so you cant use fuel now because you bypassed it. So will a standaone system work to do this?
Tonys idear was to use return fuel, I think its too hot but maybe not. If it is, again, would a stand alone system work? Be worth it?
I guess nobody knows the answers, ive never heard of one failing that has been ran dry or go too hot, am i saying it wont happen, nope. After i relocated mine i cooled it with coolant, ran a pump, cooler and water tank, i got tired of tracking down leaks so i just took it all off, couldnt tell a difference either way.
I drove my truck around 150 miles today and it ran for about 3 hours straight. It was 50 degrees out here today. After I got back home I checked the outside of the ficm with a flute temp gun and it was 72 degrees running dry.
yeaq but what about the inside where the fuel flows thats where we need to see what temps it gets too
GMC_2002_Dmax
The Still Master
You also have to realize that fuel will be the ambient air temp regardless, so if you are in TX or Socal and it is 105 degrees that is where you are starting with for summertime temps.
As the fuel returns to the tank if the 34 gallon tank is full or the 26 gallon tank is full the fuel is going to cool off in the tank, it would take a long time to raise the temp in the tank to 200 degrees.
As the fuel returns to the tank if the 34 gallon tank is full or the 26 gallon tank is full the fuel is going to cool off in the tank, it would take a long time to raise the temp in the tank to 200 degrees.
GMC_2002_Dmax
The Still Master
That is because it is on the drivers side of the block, that long tube off the water pump headed to the filter location.
I was thinking about a different set-up on the gassers.
My bad, but the oil is still cooled at the filter head.
I am with Rhall on this one. they can burn up either way. Am i worried about it? nope. To each their own. Leave it how it is, cool it with return fuel, run a seperate system, or run it dry. either way you dont here of many FICM's burning up so pick your poison.