Fw: [DML] Cooling System

["Chris Parnham" <chrisparnham@xxxx>]

----- Original Message -----
From: <DMCVegas@xxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Friday, May 18, 2001 4:08 PM
Subject: [DML] Cooling System


> 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
>
>
>
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