The night before last I finally got around to installing all the new upgrades for my car. One item was the Overheat Protector by DMC Joe @ DeLorean Services. Installation was beyond simple, and took less then 10 minutes. Tools needed were a couple of rachets, a screwdriver, and some pruning shears. With a cold engine block, the coolant loss/mess was very minimal. All I had to do then was top off the coolant overflow bottle, and run the engine! The unit started working right away. Normally without bleeding the system, the temp will rise quicker then normal. But it took quite a bit longer this time. The DeLorean cooling system itself does a good job of cooling the engine. There only problem with the system is air getting trapped inside. If too much air becomes trapped in the top of the water pump housing (the highest point in the system), it looses suction. Once suction is gone, water stops pumping, and you know the rest. My mechanic says that it can take quite a while to bleed all of the air out of the system on the DeLorean. And from what I've seen, he's right. Bleeding the system is not impossible or very difficult at all. But it is a chore. When bleeding off the system, you are not just bleeding air, but coolant as well. If you bleed too much at a time out, the level in the surge tank will drop low enough that air will be sucked back into the system. You also can't leave the pressure cap off the tank because once the engine reaches it's specific temp, the thermostat will open up. I tried bleeding the system back into the overflow tank to avoid coolant loss. This resulted in coolant exiting the overflow bottle with all the sutlety and heat of a small volcano. I didn't get burned, but I did waste a quite a bit of fresh antifreeze. So to bleed the system properly I've always bled off a little coolant at a time into a bucket, wait 'till the engine cools, refill over flow bottle, start over... That's where the self-bleeding kit comes in. Once installed, there should be no problem with bleeding the system ever again. The system works fine in as doing it's job. It just needs that extra step taken. But on a different subject, I have no idea as to why DMC never used the same cooling system from the Alpine on the DeLorean. It looks like the system can bleed itself. But with the Overheat Protector in place, researching the changeover isn't even warranted... -Robert vin 6585