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Any universal diesel rated fuel pump with like 6-14 PSI will work fine. Don't need a real lot of flow since burn rate is very low, but typical pumps would be about 35 gph at freeflow. For reference I have used airtex E8135 many times with perfect results.

Although your fuel pump is clicking away, your description is a classic sign of a failing fuel pump. Just because they make noise doesn't mean they are good. It just happened to me ( again ) recently. Machine was running great one day, next day my buyer arrived and the machine would bog at...

Gotcha... well, yank the water pump and see if you have an issue with the impeller. When you reassemble pay attention to the O-rings on the cross over tube. Clean the rust out of the head and interface plate where the O-rings sit and lube the new o rings a little. If you reuse the old o-rings...

So after 15 minutes the temp gage is assumingly pinned all the way up? and you start puking antifreeze out the overflow? Are you getting an over temp fault light? I know you mentioned it was hot, but just trying to rule out cylinder pressure getting into the cooling system and over pressurizing...

Another helpful trick is to drill a 1/8" air bleed hole through the flat section of the thermostat. Some better brands come with a hole already there with a little loose fit captive pin that will seal it once pressure builds. This allows the air to pass through when filling, but 1/8" is small...

It's difficult to tell the condition of ALL the tubes, but if you disconnect the lower hose and stick a garden hose in the top at full open you should have full flow out the bottom, it should not be restricted and forcing pressure out the top. You may get some splash-back out the top because the...

Running it without a thermostat could very likely be the cause of the overheating. It may seem contradictory, but without the thermostat to regulate the flow, water will circulate too fast and not transfer its heat properly. Excessive levels of antifreeze and insufficient water will also cause...

So you pulled the t-stat, flushed motor, replaced t-stat and new coolant, then it overheated??

First thought would be a stuck thermostat. Any idea if the upper hose was excessively hot when it shut down or still cold / cool? Also, was the temp gage pegged right? First you should verify the engine actually overheated and the issue isn't a faulty sensor. Then verify the hoses and radiator...