Can you explain the reason and method for the "
mulitple flush changeover". Is this necessary if you do the flush at the same time you do the 60K pump change?
Also, are you saying that prior to Dex-Cool that you were only getting 40,000 out of the new OEM Ford pumps, but 80,000 out of the A1-Cardone remans?
Are you getting 100,000 out of the Ford OE pumps, or only the A1-Cardone pumps using Dex-Cool?
The silica-free nature of the Dex-Cool was one of the reasons I was willing to perform the mulitple flush changeover effort. I was hoping to get longer than the 40,000-mile (new Ford pump) to 80,000-mile (A1-Cardone remans pre Dex-Cool) lifetimes I was getting from the water pump seals....
The only approach to extending the seal lifetime was the elimination of the abrasive silicas in the coolant. Dex-Cool advertised that benefit. Since the A1-Cardone remanufactured pumps I have been using come with a lifetime warranty from my local O'Reilly Auto Parts stores, I must wait until the pump fails in order to return them for a free replacement. I have only had to do this once in the last 180,000 miles. I have seen a good 100,000 miles from the Dex-Cool'ed pump. It would be great if I could get 120,000 miles out of each pump; then I could change them every second 60K service.
Since the labor to replace the pump is free, I wait until it leaks before changing. When I perform the 60K service for other SHOwners, I recommend replacing the pump during the timing belt change since the common labor effort is a cost savings.