[DeTomaso] Coolant drain

shawkins777 at comcast.net shawkins777 at comcast.net
Wed Sep 12 00:55:36 EDT 2012


Or run the engine with the drain open. 

Steve 

----- Original Message -----
From: "Will Kooiman" <will.kooiman at gmail.com> 
To: "Pantdino" <pantdino at aol.com>, JDeRyke at aol.com, fisher95020 at yahoo.com, detomaso at realbig.com 
Sent: Tuesday, September 11, 2012 11:48:05 PM 
Subject: Re: [DeTomaso] Coolant drain 

You can drain the coolant really fast if you drop a valve. 


On 9/11/12 10:58 PM, "Pantdino" <pantdino at aol.com> wrote: 

> 
>I admire the courage you guys have. I'm too afraid of air getting trapped 
>in the system to want ALL the coolant out. 
> 
>Personally I prefer to just park the car with the rear elevated, open the 
>radiator drain petcock and air bleed valve, and be happy with what comes 
>out. Refilling then involves closing the radiator drain petcock, filling 
>until no more air comes out the bleed valve, closing it, then topping up 
>the system and bleeding the radiator again after allowing the car to run 
>until the thermostat opens. I empty the unpressurized tank and fill it 
>with fresh antifreeze before starting the car. 
> 
>If you change the coolant often enough there is no reason to get it all 
>out 
> 
>Jim 
> 
> 
>-----Original Message----- 
>From: JDeRyke <JDeRyke at aol.com> 
>To: fisher95020 <fisher95020 at yahoo.com>; detomaso <detomaso at realbig.com> 
>Sent: Tue, Sep 11, 2012 8:44 pm 
>Subject: Re: [DeTomaso] Coolant drain 
> 
> 
>In a message dated 9/10/12 5:25:34 PM, fisher95020 at yahoo.com writes: 
> 
>> I have not yet found a satisfactory way to drain the coolant on my car. 
>>I 
>> have a Fluidyne rad and if you open the drain cock it will run all down 
>> the front bodywork and make a large mess and take a long time. 
>> 
>On our Pantera with a Fluidyne rad, I removed the lower left rad drain 
>(1/4-pipe thread) and added a straight pipe-to-AN-4 fitting to take a 
>stainless 
>steel line about 6" long. The line makes a 120 degree bend and winds up 
>right against the backside of the radiator crossmember sheet metal, held 
>there 
>with a small strap-bracket. At the end of the ss line is a commercial 
>drain 
>valve. It is accessible from outside the car without jacking or turning 
>the 
>wheels, if you know where to reach but is invisible from the outside. The 
>valve's end hangs down 1/4" below the sheet metal but that is far from 
>the 
>lowest part of the chassis right there..... Coolant drains without 
>touching any 
>part of the car. The rate at which coolant drains from a rad is vastly 
>increased by opening the UPPER rad air bleed valve and the rad cap, so 
>air can 
>be 
>drawn in as coolant exits from the bottom drain. 
> 
>You can weld or braze a boss on the side of one of the the big coolant 
>lines, drill & tap it for 1/4-pipe, & add a radiator drain valve. This 
>will 
>drain most of the engine coolant without the valve hanging down. 
>Obviously you 
>won't be able to drain it all from a valve in the side of the pipe, but 
>you 
>seldom need to drain 100%. Also obviously, you will have to jack up the 
>rear somewhat to access an engine drain like this. 
> 
>Some guys remove the lower block plugs in the sides and add special 
>radiator drains with poly hoses shoved on the drain valve's brass ends. 
>This 
>would 
>also work directly as a lower left rad drain. The hoses are trimmed to 
>reach 
>just below the oil pan so no draining coolant touches the pan, and can be 
>tucked away when not in use. Again, you'll need to jack the rear end up 
>for 
>valve(s) access. If I remember, one plug is above the starter, the other 
>is 
>in a matching place on the left side of the block near the left motor 
>mount. 
>Good luck- J Deryke 
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