Many thanks for the information, Uncle Bob.

The S-10 is my work truck and gets regular maintenance at a Kwik Kar shop owned and run by the mechanic I mentioned in the posting. Oil is changed reasonably regularly and other fluids are topped off, including coolant. He seems like a decent dude so I'm assuming that he doesn't top off with swamp water or something not compatible, but .......

With the last two radiators I did hear pronounced gurgling sounds a while after installing a new part but I don't remember ever finding the reservoir low, but it could have been.

That "Red River mud" is soupy crud and the radiator cap was covered with it. It looks like I neglect a good little engine.

I don't! I don't! I don't!

Maybe I should ask for a volume discount on radiators and quit bellyaching.

Thanks again,


Jim
Elder Geezer