Hey guys I was just thinking tonight about if it's a good idea to add a fuel cooler on my lml now that it has been converted to a cp3. I never gave any thought of this until repairing a fuel leak on a lmm at the cooler today and realized lml do not have a cooler. What is your opinion
Fuel cooler after cp3 conversion
- Thread starter Dart.340
- Start date
No return from the fuel injectors at all? Or just not thru a cooler? I had never heard this previously/
Injectors don't return? Am I missing something?
I'm just wondering because any cp3 duramax has a fuel cooler on the return line to the tank
adding one will not hurt a thing. it will only help. i would add one personally
Everything I have seen still says that piezos work like traditional HPCR injectors, just that the piezo crystal control is much faster and more precise. I've only looked at pictures of LML injectors, but they sure appear to have a return line on them, and cutaway views show a traditional pressure differential style injector, just utilizng piezo crystal control instead of an electromagnetic solenoid.
The LML piezo injectors still return fuel, obviously.
They just return a lot less fuel compared to electromechanical solenoid injectors on the 2001-2010 Duramax's....which is why GM decided it wasnt necessary to run a fuel cooler on the LML from the factory, because not much [hot] fuel is returned from the piezo injectors.
Ben
They just return a lot less fuel compared to electromechanical solenoid injectors on the 2001-2010 Duramax's....which is why GM decided it wasnt necessary to run a fuel cooler on the LML from the factory, because not much [hot] fuel is returned from the piezo injectors.
Ben
In other words, the bean counters said it isn't required, but probably would have been a good idea. I still think LB7's return the most fuel of any of them each time the injector is fired. I know when I compared the internals of an LB7 to an LLY, there was ALOT of difference's inside them that lead me to believe the LLY's returned less per firing.
Whoa I never saw that I didn't finish what I was trying to say...meant to say they don't return as much as previous gens.
Ive never logged average fuel temps of driving an 01-10 truck with a fuel cooler, and an 11+ truck without a fuel cooler.
But it would be interesting to do that, before making a statement like that.
The bean counters also have to answer to the engineers, remember...and the bean counters also have to take into account warranty stuff. If they save money by not putting a fuel cooler on, and it wears out fuel system components, they're going to be losing a lot more in warranty replacement costs............so longevity IS taken into count, even tho it might not seem so.
If you log both trucks side by side, and the fuel temps are roughly the same, what does it matter?