When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
In other news, I went to five auto parts chains and Napa was the only one that had either 7/16 or 3/4 fuel line. I also picked up a coupon for 30% of any in-store purchase for tomorrow only. Which means I'll get a new HFCM for $20 more than I paid for just a pump, as long as someone doesn't walk in and buy the only one in the store before me. At $223.30 even rockauto can't beat that deal. My plan was to cobble one together from the two I have in stock and a new pump, so I'll sleep much better this way.
Do you care to share your experience with the Dahl water separator and tell us why you'll never do that again?
Forgot I had a piece of 1" stainless rod. The plug fit perfectly at 0.835", and its purdy too!
Here's the tank ready to go. Had to take about 5" off the fuel line between the balance tube lugs, but it was easier to get the tank back up than I thought it would be. Having the front of the bed raised helped a lot I'm sure.
Back at the turn of the century ..... we were hyper about fuel filtration and getting the entrained air out of the fuel. Us 7.3 guys had a cackle issue, and entrained air was a possibility of the cause.
I didn't have a cackle issue until I installed a Dahl filter. But in our enthusiasm for filtering, many of us went to 5 to 2-micron filtration on the suction side. That separated the air out, but over time the filters with the low micron filtration would fill with air to the point of starving the motor. And while the water drains were great for removing water, the only way to clear the air was to flip the assembly up-side-down and bleed the air out. Hence the name, Dahl flippers.
The way around that was to go back to primary filters of a higher micron, the same that Racor uses for the primary filters. It's like they thought of this.
The 6.0 system is interesting. Entrained air may be released anywhere on the primary supply side. It will pass through the primary filter, but the secondary filter has too fine a micron size. So air bubbles of any moderate size stay on the non-injector side of the secondary filter. If it builds up, the air bleed orifice that I pointed to, bleeds off air on a new filter change but also any of the entrained air that is released.
I was wondering how the air was released from the system when I was siphoning the fuel from the 5gal tank in my bed to the HFCM. Now I know. So if air build-up isn't a problem, a separator of proper flow rate should theoretically work, right?
I got my 30% off Napa/Carter HFCM this morning. Glad I pulled the filter to inspect...
I went to a different store that had one for replacement and the same o-ring was damaged too. I got "lucky" at the third store. I've never had damage to this o-ring since I've owned the truck; four years and two HFCMs. I've always installed the fuel filter by first plugging it into the cap and then cranking it down. This is now twice in two days. The first was a Delphi pump that I bought to use with the old HFCM. I installed it and then pulled it to see if I could return it when I found out about the Napa deal, and the o-ring was as bad as the one pictured above. I was still able to return it as the cap wasn't mounted to the pump body very well. Maybe that was a case of misalignment due to the cap. Maybe Napa's deal is just poor assembly on the production line. I hate to think that something has changed with the parts and this is going to be a problem for everyone going forward. I know I'll be installing the filter first followed by the cap from now on.
Having had the opportunity to inspect three of the Napa/Carter HFCMs, I can say I am not impressed with their quality control. The first two had clean castings, the one I brought home not so much. Also, the filter cap on the third one has a bunch of little dents in it like it was getting knocked around in shipping on its way to assembly. I am also not impressed with Delphi at the moment. Not only did the pump have its issues, but the foot on the sender unit was warped and it was mounted too high on the uptake tube. I may install a sump just so I don't have to worry about the crappy foot anymore.
It's typical of OE suppliers to send the out of spec units to the aftermarket. Usually, it's the typical issues you've seen of the O-ring. My unit has a little flash on the O-ring, I'll address that. I've never seen one with a chewed O-ring like that.
At this point, I have no intention of adding another filter into my fuel system. I'll just let the primary do its thing, and the secondary the same.
If you need to polish your stored fuel, I set that up with your old HFCM and ower it with a separate battery. Or you could add a secondary, tighter filter with that loop.
I saw this at Napa and it piqued my interest for prefiltering my stored fuel. Racor also has a version of it. I can't find any info about how many gallons it's good for.
I was pulling the flex lines off of the metal balance tube to try fitting it into a box for storage and found this. It appears I might have been getting water in through the forward connection after all unless the water worked its way under the hose from the inside. There is rust in both ends but much worse at the front and only on the outside of the front.
At least I know the system up to and including the HFCM is clean, but none of the work thus far has made any difference with my fuel pressure. The low dropped a pound to 42psi today while testing. Moving up the line to the fuel bowl and regulator next I suppose.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
