C15 Severe Coolant Loss

I left for the Sunshine State a bit earlier than planned. I liked out Thursday afternoon, cuz I couldn't sleep. Go figure. All went well until I went through the one and only till booth Illinois. It sounded like the kitty was tryin' to hack up a furball. I found a nice quiet spot and pulled the primary filter. It had I big ol snag of dead algae in it. Filled up a new one, screwed it on and away we went. All the way to Paducah, when I pulled into a wayside, because the ol Pete wasn't licensed as a boat. Twas rainin' a bit. It turned out to be a good move, as I later found out, that the wind tipped a big truck over on a bridge. Plugged up traffic for at least three hours. I got the Fort Myers this morning. Had bacon and eggs that I cried on the flatbed like a great big griddle. Dam its hot down here! Oh well, it's my girlfriends dad's 90th birthday this weekend. My gift to him was to show him the truck that I was sending him pictures of. Sometimes, some things are just worth the effort.
Happy birthday, Bob!

 

And that is why you call it home T800H. I like snow, so this is why I just come to visit your beautiful state. When I get my chores done, it's time to go fishing!

 

Well, it's been a while since anything has broken, but holding true to "if it's man-made, it will fail", I developed and faint, strange sound, that sounds like a tiny little turbo charger. I would here it at an idle and going down the road. It would last for just a few seconds and then not be heard for a few minutes, or up to an hour, or so.
What it turned ou to be was the fan clutch failing. When I completed an autopsy, the bearings were completely shot. A new kit from Kit Masters and all is well again!
I just wanted to toss this out there, in the event that anyone else might hear the same little noise.
Keep the shiny side up!

 

The more things that break and I fix, the more I learn and it always good to know more about what makes this Peterbeast tick!

 

I took my big truck for a ride yesterday. The oil pressure went up to about 65# like it always does. When it warmed up, the oil pressure only goes to about 38# at an idle. If I speed up the rpms to 1000, it goes to 65#. I put a separate gauge by the oil pressure sending unit and it agrees with the dash gauge. What would cause this pressure change?