If you think the coolant isn't circulating there are only a couple of reasons why. First make sure you have bled ALL of the air out of the water pump. Check that the bleeder isn't plugged up. If you keep getting air then you have leaks to fix. Next check the suction hose to the water pump to be sure it isn't kinked or collapsing under vacuum. Finally there is the small possability that the thermostat is stuck closed. Easy to test if you remove it and put it in a pot of water and heat it up. One of the best indicators of the health of the cooling system is a pressure test. If it doesn't hold 15 psi for 15 min then you WILL be replacing all of the hoses and seals and along the way correcting all of the other things you will inevitably find wrong. If you can't get anything to come out of the bleeder try bleeding with the pressure tester attached. If it still won't come out the bleeder is plugged up inside. Remove the bleeder screw and poke it clear with a piece of wire or a drill. It is just like a bleeder screw on the brakes. It is hollow with a hole on the face of the flare cross-drilled into the hollow. If it has been leaking (because it wasn't tight) it is all corroded up inside. You can also use the wire on the spot where the bleeder attaches till you get a good flow. When you are all done make sure you have a 50/50 mixture of good anti-freeze and soft water or you will have bigger problems in the future. The Delorean venders sell a stainless steel bleeder screw that won't seize or corrode or you can get the auto bleeder kit. It is very unlikely the impeller has come loose or has corroded off but is is possible. David Teitelbaum vin 10757 --- In dmcnews@xxxx, Jim Strickland <ihaveanaccount@xxxx> wrote: > I recently found that my machine had totally run out of water/coolant.... > I filled up the water to full (a few times, as each time I started the > machine up the level went down again). Then I put it on level ground and > opened the bleeder valve to get the remaining air out... Nothing came > out. I'm a little perplexed, becuase I did a bleeding a few months ago > and everything seemed to be working fine at that time. > > Can I assume that my water pump is not circulating water??? [moderator snip]