318SixPack

Did the radiator flush over night (Royal Purple Royal Flush) and just a little bit of scale came out. It was likely from the block, because I blew out heater core separate. No rusty water or crud.

I do not recommend adding dye unless you are tracking down a leak. That stuff is pretty persistent.

There was no hardware on the old radiator (a replacement from 2003ish) for attaching the top of the AC condenser to the radiator, so I zip-tied them together through the holes where they are supposed to be mated.

Trimmed the new Gates hoses a little. Lower hose from the block side, upper hose from the radiator side. Now they fit skookum, no interference with anything. Sprayed down the clamps and such with silicone spray. Trying out these fancy constant tension hose clamps.

On plain distilled water with flush fluid, it as running on the cool side a lot. After washing out fluid mix and installing Prestone coolant at 50/50 mix, it runs just a hair under 210F.

BTW, checked at my local O'Reilly to see if they could test my old cap and they said they don't do that. Even though they have a test kit to rent that includes the gear to test the cap. Will check at their distro center near my office and see if they do that.