text:  No, we don't do that. We just replace the cooler. I've had a number of customers try what they said was everything, whatever, except for this maybe. It doesn't sound like it. Maybe not. It hasn't worked. They've tried it, and it says it hasn't changed anything, not even a little bit. Sometimes with heater cores, they try to clean them, and you get a little more heat, but it's not sufficient, but there's a change. With this, they said they didn't see any kind of change. It still was running hot, so we just put the upgraded cooler.