[DeTomaso] head drilling for air release

Thu Sep 3 14:24:05 EDT 2009

Maybe, just maybe, the system is able to maintain a bled system air free if only small amounts of air appears at the bypass entrance at a time. Pulling the full height of the radiator away is too much but moving only a small air bubble is possible with the existing pressure drop. Hmm, if I install a transparent hose I could see what happens! :-)

Tomas

----- Original Message ----- 
From: "Kirby Schrader" <kirby.schrader at gmail.com>
To: "Tomas Gunnarsson" <guson at home.se>
Cc: <detomaso at realbig.com>
Sent: Thursday, September 03, 2009 8:06 PM
Subject: Re: [DeTomaso] head drilling for air release

> The SPF GT40's have a similar setup. Strangely enough, it doesn't work
> there either...
> :-)
> 
> On Thu, Sep 3, 2009 at 12:54 PM, Tomas Gunnarsson<guson at home.se> wrote:
>> I had that nipple on my car too, blocked off. As my radiator has "IN" in the upper right corner I figured I could make the radiator self-bleeding by connecting that nipple to the "OUT" tube going to the waterpump. The pressure drop across the radiator would then make any air go through the small hose to the waterpump and eventually end up in the expansion tank. Didn't work at all... :-| Pressure drop across the radiator must not be big enough.
>>
>> Tomas
>>
>> ----- Original Message -----
>> From: "Thomas Tornblom" <Thomas.Tornblom at hax.se>
>> To: <asajay at asajay.com>
>> Cc: <detomaso at realbig.com>
>> Sent: Thursday, September 03, 2009 5:29 PM
>> Subject: Re: [DeTomaso] head drilling for air release
>>
>>
>>> asajay at asajay.com skrev:
>>>> I believe if continue with your TSB's you'll find that mod was later reversed.
>>>
>>> My 1984 GT5 had that. I don't see how it could work at all, so I
>>> disconnected it when I installed the Fluidyne radiator, which didn't
>>> have any provisions for this.
>>>
>>> Thomas
>>>
>>>>
>>>> Asa Jay
>>>> (don't have my TSBs handy)
>>>>
>>>> Quoting Dan Mixon <tipo874 at comcast.net>:
>>>>
>>>>> Pantera TSB No. 8 Article No. 61 made extensive changes to the cooling
>>>>> system. One of the changes installs a bleed line from the upper right corner
>>>>> of the radiator to the swirl tank. This was put into production on 4/5/73
>>>>>
>>>>> -----Original Message-----
>>>>> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
>>>>> Behalf Of Asa Jay Laughton
>>>>> Sent: Thursday, September 03, 2009 08:59
>>>>> To: detomaso at realbig.com
>>>>> Subject: Re: [DeTomaso] head drilling for air release
>>>>>
>>>>> I found out from a Ferarri friend, the recommended procedure for his
>>>>> Ferarri is to run a tube from a top radiator bleed back to the swirl
>>>>> tank. Run the engine until there are no air bubbles, then seal the
>>>>> radiator bleed. All done.
>>>>>
>>>>> Asa Jay
>>>>>
>>>>> Asa Jay Laughton, MSgt, USAFR, Retired
>>>>>
>>>>> & Shelley Marie
>>>>> Spokane, WA
>>>>>
>>>>> 1971 Mach I Mustang [ASA JAY]
>>>>> 1973 Pantera L 5533 [ASASCAT]
>>>>>
>>>>> ******************************
>>>>> http://www.asajay.com
>>>>> http://www.teampanteraracing.com
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> wkooiman at earthlink.net wrote:
>>>>>> I've always thought it would be interesting to attach a tube to the top
>>>>> radiator bleed, and then hang an IV bag.
>>>>>> Imagine people staring as you let it idle and slowly remove the air.
>>>>>>
>>>>>> But like I said, I've had good luck bleeding like Thomas described.
>>>>>>
>>>>>> -----Original Message-----
>>>>>>
>>>>>>> From: MikeLDrew at aol.com
>>>>>>> Sent: Sep 2, 2009 9:52 PM
>>>>>>> To: asajay at asajay.com, detomaso at realbig.com
>>>>>>> Subject: Re: [DeTomaso] head drilling for air release
>>>>>>>
>>>>>>>
>>>>>>> In a message dated 9/2/09 19 41 1, asajay at asajay.com writes:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> What does front or back have to do with it? Why not jack the -front- up
>>>>>>>> and bleed air from the tubes and radiator out a radiator bleed, and in
>>>>>>>> the process raise the front of the engine slightly to get air bubbles in
>>>>>>>> the back of the heads to move forward and hopefully out the thermostat?
>>>>>>>> Sounds like a better solution to me.
>>>>>>>>
>>>>>>>>
>>>>>>>>>> There's a very good reason. It's because the filler is at the back.
>>>>>>> Half of the bleeding process is topping off the system. If you raise
>>>>> the
>>>>>>> front of the car, your filler is no longer at the highest point in the
>>>>>>> system, and you can wind up with air every place above the filler (since
>>>>> the
>>>>>>> filler is open during the bleeding process).
>>>>>>>
>>>>>>> The back is raised to elevate the filler. Now, if you were to somehow
>>>>>>> incorporate a second filler at the top of your radiator like a
>>>>> conventional
>>>>>>> car, then your plan might work great!
>>>>>>>
>>>>>>> Mike
>>>>>>> _______________________________________________
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