I used to use GMB pumps, but switched to Hepu largely due to posts on the Brickboard praising their service.

The 745 referred to in this post is my son's. The current pump failed at 315K. It was installed in 6/22 at 297K. So less than two years and 18K. The failed pump at 297K was installed on 11/19 at 277K. So less than three years and 20K. That pump had been installed on 4/16 at 235K.

So three failed Hepu pumps in eight years and 81K miles. These are internal seal failures evidenced by coolant expelled through the weep holes. I thought a contributing factor might have been due to system pressure but I switched to a black cap when I changed pumps in 11/19.

This has not been my experience with Hepu pumps on three other long term B230 equipped cars. Of course I have had to remove pumps and reseal that poorly designed "donut" between the head and the pump many times since I started driving these cars 40 years ago.

These last two pumps have been covered under FCP lifetime warranty or I probably would give another brand a try. So at this point I am not a big fan of Hepu pumps. I am, however, a big fan of FCP and their lifetime warranty.
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Any twenty minute job is just a broken bolt away from a three day ordeal