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Message
re: Calling 6.7 Cummins owners
Posted on 8/18/15 at 9:46 am to VetteGuy
Posted on 8/18/15 at 9:46 am to VetteGuy
It's extremely important with new diesels. I'm not sure how ford's fuel pumps are built but I know the Cummins are oil lubed and the turbos are high so it takes a second to get oil pressure everywhere. When you load the engine before it gets good pressure in the fuel pump it's going to die pretty quickly.
1
Posted on 8/18/15 at 9:51 am to DownshiftAndFloorIt
They all use the same pump, more less.
Posted on 8/18/15 at 9:59 am to Ice Cream Sammich
Does ford use Bosch pumps?
Posted on 8/18/15 at 10:08 am to DownshiftAndFloorIt
Cp4.2 instead of the Cp3.
Posted on 8/18/15 at 10:17 am to Ice Cream Sammich
I would like to take that apart.
Posted on 8/18/15 at 10:21 am to VetteGuy
I wish they were serviceable. The regulators are what go out on them, oftentimes. However, they are all one piece and cannot be changed.
Posted on 8/18/15 at 10:51 am to Real Pirate
I change mine on my Duramax every other oil change which is ~12K miles. $260 seems a little high. I would expect for it to be right under $200.00 for both including labor. Changing a fuel filter on a 08' Duramax is a pain in the arse though. You have to take the front right tire off to get to the filter. I have a guy across the street from my office do all of it.
Posted on 8/18/15 at 10:58 am to plazadweller
No idea on Cummins, but on F250 easy as pie. I just bought both filters on Saturday for $50 on Amazon. I will literally drink more beer tonight cycling the fuel pump to refill the filters then I will changing them.
Posted on 8/18/15 at 11:37 am to Ice Cream Sammich
^^^This. I've never dealt with an easier change for a diesel engine. Both filters are easy to access.
Posted on 8/18/15 at 12:10 pm to Ice Cream Sammich
The cummins ones are pretty easy IIRC
I'm not too familiar with the small Bosch pumps. Does the fuel leave the pump and go through secondary filtration before it goes to the plungers?
I'm not too familiar with the small Bosch pumps. Does the fuel leave the pump and go through secondary filtration before it goes to the plungers?
Posted on 8/18/15 at 12:28 pm to DownshiftAndFloorIt
My very rudimentary understanding...
Filter, LPFP, Filter, HPFP, Injectors. The Cp4 pressurizes it up to 30,000 PSI, I cannot imagine that it goes into a filter at that pressure.
Filter, LPFP, Filter, HPFP, Injectors. The Cp4 pressurizes it up to 30,000 PSI, I cannot imagine that it goes into a filter at that pressure.
Posted on 8/18/15 at 12:33 pm to Ice Cream Sammich
It doesn't. The gerotor pump on the back pushes it to about 110psi and then the plungers step it up to 30,000
Typically there's a filter between the gerotor and plungers but I wasn't sure if the small engines usually did that or if they just jumped from the low pressure to high pressure pumps.
Typically there's a filter between the gerotor and plungers but I wasn't sure if the small engines usually did that or if they just jumped from the low pressure to high pressure pumps.
Posted on 8/18/15 at 12:52 pm to DownshiftAndFloorIt
All this talk about them and I'm realizing that I can't probably comprehend what 30K psi is actually like.
Posted on 8/18/15 at 1:17 pm to Real Pirate
I've never changed the fuel filter on my 7.3L PSD. I've had it for almost 5 years but have only put about 10k miles on it (if that), and the previous owner had just had it done when I bought it. it's $27.70 shipped for the filter and about a 10 minute job. single filter. gonna do it this weekend.
Posted on 8/18/15 at 1:25 pm to McLemore
That's a lot different. It's a low pressure fuel system with loose tolerances that will suck up a lot of crap and not care.
Posted on 8/18/15 at 1:37 pm to McLemore
I am not sure that my dad EVER changed his fuel filter on his 7.3. Still ran like a top the day he sold it. Newer diesels are completely different animals, obviously. shite, many gas burners these days make more TQ than the 7.3 made until 2000.
Posted on 8/18/15 at 2:33 pm to DownshiftAndFloorIt
Yep. It ain't fancy but it goes and goes.
Posted on 8/18/15 at 4:57 pm to McLemore
I went too long with out filter changes in a 02 Cummins. Had to rebuild injectors.
Posted on 8/18/15 at 5:12 pm to Ice Cream Sammich
The higher pressure is one thing and part of it is also the fuel. Ultra-low sulfur doesn't offer quite the same lubricity the old stuff does. It's supposed to have additives that are supposed to help lubricity but they are mostly detergent additives and that is their primary function. Extreme pressure, tight critical tolerances, and reliance on very specific fluid properties and maintenance schedules means very little room for error.
Posted on 8/18/15 at 5:18 pm to plazadweller
quote:
Changing a fuel filter on a 08' Duramax is a pain in the arse though. You have to take the front right tire off to get to the filter.
I used one of those ebay kits for mine where you cut out a section of wheel liner and install the removable trim piece. Made it much easier and quicker for me.
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