5 out of 5 pumps developed leaks this week. seems the glue on the reservoir housing fails under temperature
My stock pump is okay but I chose to position it between the radiator cool port and the miner reasoning lower temperature means less wear.
The second pump, different model manufactured by Syscooling, only developed the leak when I tapped on it with a screwdriver to bring bubbles to the surface. After laying down a line of glue along the back seam and letting it dry some hours, it wasn't completely dry except on its surface. I pressed on the dried surface and saw a couple of dots of wet glue pass to the inside where the leaks had developed.
Pump repair was a failure. Will try to remove the tank and re-glue.
Put the second radiator after the stock stock and before the pump feeding C1#1. C1#1 is now the cooler of the two C1's. Previously C2 was cooler, cooled with the condenser.
Took the pump, gripped the tank snuggly, pulled, the tank came free of the bottom.
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I thought the top simply separated from the bottom but it turns out it wasn't quite that. The edge of the clear plastic seemed jagged and in a back corner a considerable amount of the clear plastic remained glued to the black bottom, broken off about an eighth inch high. Perhaps the top wasn't glued but welded to the bottom with a chemical that liquified the edge for a bit and allowed them to bond. I went with JB Weld instead of 5 minute epoxy, putting a bead along both surfaces and mating. Tomorrow I'll run a tube from the in port to the out port and run to check for leaks. Leaks near the electronics are disconcerting.