[DeTomaso] cooling system bleeding- Vacuum Cooling SystemFiller Tool- Tooltopia versus Harbor Freight

Tomas Gunnarsson guson at home.se
Mon Jun 29 08:40:38 EDT 2009 

While I haven't used or even seen this tool I have a few opinions. Using low pressure to leak test a system normally subjected to high pressure is IMO a poor idea. For example a hose pushed onto a nipple will self-seal with low pressure and self-leak with high pressure. 15 inches of vacuum isn't that much compared to the about 25 inches we have as atmospheric pressure. Since it's about half of ambient the air inside the system will expand to about twice its "normal" volume. If for instance you have a 14 lbs cap this air will of course be about half of its "normal" volume during operation. I see it as completely pointless to subject the system to vacuum before it's filled and bled "as usual". Then it makes sense to put it under vacuum. This will make the air dissolved in the water "boil" out and that air can then be bled in the normal fashion. Once the dissolved air is out of the water it doesn't immediately dissolve into it again when pressure is reapplied. Additionally, if you have any air pockets that air will expand to twice its size and hence half of that air will escape to a bleedable point. When you release the vacuum half the pocket volume will be refilled with water and when you start driving only about 25% of the pocket will be filled with air.

Tomas
----- Original Message ----- 
From: "Chris Difani" <cdifani at pacbell.net>
To: "Asa Jay Laughton" <asajay at asajay.com>; "panteralist" <detomaso at realbig.com>
Sent: Monday, June 29, 2009 7:44 AM
Subject: Re: [DeTomaso] cooling system bleeding- Vacuum Cooling SystemFiller Tool- Tooltopia versus Harbor Freight


> Guys... Guys....
> 
> Once again, those of us who are the true tool junkies lead the way....  
> 
> This shameless copy of the world renown tool maker Harbor Freight's product, is simply pitiful... not to mention almost twice (or three, depending on which version you're looking at) times the cost of Harbor Freight's version.  
> 
> Now I can't speak for Tooltopia's contumelious copy, but HF's work of tool art is a wonderful example of cooling system engineering.  Not only that, it also works.  What it does is use your shop air compressor to generate vacuum, which is then metered into your cooling system (to pull about 15 "inches of mercury" vacuum), and then is "held there" for ten minutes or so at your discretion.  The filler tool has a vacuum gauge on it, and the instructions recommend that once you reach the recommended vacuum level, that you hold it there so you can be assured of the cooling system's integrity.  
> 
> The vacuum is enough that all your rubber hoses will flatten, and make you think it's just sucked the guts right out of your engine.  But what it does is ensure that your cooling system is leak proof, and ready to be filled.  Then it also ensures that all the little "nooks and crannies" are going to be filled, rather than be left with a pocket full of air here, and there, and everywhere.  
> 
> It's an excellent tool.  It's got three main pieces to it, one is the venturi vacuum generator, the second is the seal that fits into the radiator filler tube/cap/neck/etc., and the third is the suction tube that you drop into your coolant supply bottles.  It's also got a nice handful of quarter turn ball valves so when you have to move the suction filler tube from the empty gallon bottle to the next full gallon bottle, you simply turn the ball valve to the "shut" position, move the suction tube to the next gallon bottle, and then reopen that ball valve.  The quarter turn ball valves also control the vacuum, the compressed air inlet, and all the other intakes, exhaust, outlets, and so forth.  The ball valves consist of a chrome plated, brass ball that is seated in a polypro plastic socket.  They're an excellent design. 
> 
> The suction tube, that drops into the coolant bottles, has a very nice screen filter on the end.  The filter acts as both a filtration device, and as a weight to hold the intake tube at the bottom of the bottles.  The filter is constructed such that the screen is well protected, and will give years of service.  The screen will also serve as a sufficient filter if you are reusing your coolant, rather than replacing it. The protective structure around the screen ensures that the actual screen will not lay on the bottom of the container, and suck any dirt, impurities, etc., that could be on the bottom of the container.
> 
> Personally I think that every Pantera owner that will ever fill their coolant system themselves, needs one of these devices.... or you need to know someone that has one.  And for under $40, it's a very good value from Harbor Freight.
> 
> For those of you who are going to go look thru the HF web catalog (after reading this), I just did so, and wasn't able to find the filler.  Tomorrow I'll venture into the depths of my shop, and get the stock number off of mine, and look for it with that number (sometimes their web catalog is not as current as we'd wish).  Also it wasn't that long ago, maybe 6 weeks or so, that HF was running a sale on this item in their mail order catalogs.  
> 
> And all the usual disclaimers:  I don't own Harbor Freight.  None of my children own Harbor Freight.  I'm not paid by them for anything.  No one has promised me untold riches if I say nice things about their stuff....  In fact no one's promised me a penny if I say nice things about their stuff....  or even bad things about their stuff....
> 
> 
> Chris
> 
> Chris Difani
> '73 L #5829 "LITNNG"
> The Electric Pantera
> Sacramento, CA
> Email: cdifani at pacbell.net 
> 
> 
> --------------------------------------------------------------------------------
> 
> 
> 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Asa Jay Laughton" <asajay at asajay.com>
> To: "panteralist" <detomaso at realbig.com>
> Sent: Sunday, June 28, 2009 9:37 PM
> Subject: Re: [DeTomaso] cooling system bleeding
> 
> 
>> Two models to choose from:
>> http://www.tooltopia.com/index.asp?PageAction=VIEWPROD&ProdID=7153
>> http://www.tooltopia.com/index.asp?PageAction=VIEWPROD&ProdID=8249
>> 
>> But I'm still fuzzy on how it operates.  Seems to me it would have to 
>> pull all the fluid through the system basically emptying it, then pull 
>> the vacuum which would hopefully force fluid into all the nooks and 
>> crannys.  Anyone try one of these can tell us how it works?
>> 
>> 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
>>  
>> 
>> 
>> 
>> frb3 at comcast.net wrote:
>>> Ford Gt forum members are discussing a tool that bleeds the air out of the cooling system.  Its called air lift  cooling tester and is sold by ToolTopia .com and I understand also by Snap- On tools.  The tool is hooked up to your air compressor hose and it creates a vacumn in the coolant lines.   The GT tech-ies swear by the tool claim it is simple to use, cheap-about $99 bucks and lowers temps about 20 degrees.  If it works on the GT it should be a natural for the Pantera . 
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