Re: water pump/ advice

[jtrealty@xxxx]

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]