Helping JimT out with an inframe ...

[JimT]

(09-23-2020 )SquareOne Wrote:  

(09-22-2020 )JimT Wrote:  ....Finally replaced my Davco unit. Forgot to bring it with me down to Rawze's so I changed it out today. It was getting to the point where the fuel level wouldn't stay above the bottom of the clear housing. No matter how much I filled it up, after a day of driving it would end up down just below the clear plastic. Installed the new one, bled the air out and we'll see how it does tomorrow....

By any chance, did the old unit ever return to a normal level as the restriction increased? Mine will do the same thing once I install new filters. It will actually take a few thousand miles before it returns to the bottom of the clear housing.

The level will then rise based off the restriction created from the filter catching contaminates. I typically change it about 3/4 the way up the clear housing rather than wait all the way to the black 'change filter' line near the top.

Well, I must have some super clean fuel right now cus the new unit is still doing the same thing. Fill it up and over the course of a day's driving it works it's way down just below the clear housing. It concerns me being that low, keep thinking I'll hit a bump and suck up some air. Might look into the lines to the tanks, just to make sure there isn't some restriction there or maybe bad vents or something.

Either way the old Davco unit had to go. It wouldn't fully seal unless I torqued it down WAY more then the mfg stipulates. It just had too much abuse over the years.

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Oh, after pulling my first load yesterday I finally got the exhaust hot enough to burn off the Corroseal. Oh well, it was an interesting experiment. Looks like it can withstand a few hundred degrees no problem, but not the full range of temps seen by the exhaust manifold. Put over 1,000mi on it bobtail running bewteen 1600-1800rpm from GA to CT without burning it off or even causing any discoloration.

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Coolant level has stabilized, but I found a small leak from the new drain fitting we installed under the truck.

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Boost pressure... Bobtail I couldn't get it to go higher than 20-22psi. With my empty flatbed it topped out around 25psi. So, I removed the little egr block plate on top of the intake manifold (there's also a plug in the exhaust manifold). That seemed to help a bit, I don't think it was sealing properly. I think I might put it on the passenger side instead. Should seal up the crossover pipe while leaving the EGR side somewhere to leak if the pressure builds up too much (heat expansion). Now loaded I've been able to get the boost to max out around 30psi a few times. Still not perfect, but that's about where it was prior to the rebuild and I've known for a while that my CAC has a small leak on the passenger side where one of the mounting bolts is located. Considering I typically drive around using 5-10psi, 15-20psi pulling grades, it should be fine for now.

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Ran a few loads this week and now the poor engine is covered in a thick layer of dust from the dirt lots :/ Outside is pretty dirty too. Guess it's bath time this weekend!