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Reply to "Mystery Tube"

radiator bleed 1radiator bleed 2

Gentlemen 

The Connection was on the front RHS looking from the rear - a small banjo fitting on the top of the radiator. I could not believe I had not noticed it previously but  now I do, and I see the seals , hose and clip looks alarmingly original !!!??  (Remind me to  sing happy birthday 47 times .......). I think I had mentally tagged it as an  overflow tube which it plainly is not. 

Another little job to attend to.

Rocky

In the cooling system mod diagram above the swirl tank looks like it could remain largely unmolested if you could just add a fixed rigid cap that had the air bleed point braised into the cap center. All the rest is the same . 

I had a look at my old overflow tank ( its not pretty ) and could likely braise in the two smaller air bleed nipples and a lower connection spigot.

Could the hose connecting the bottom of the overflow tank  be a smaller diameter than 5/8" ? Say 1/2" or less ? Is it just a bleed  hose ? Its getting awfully congested around the suction on the water pump and space ( as you undoubtedly know )  is non existent.

I have one 5/8" plugged connection point remaining next to the cast spigot on the water pump that I might be able to squeeze a 1/2 " barbed spigot ( or hopefully smaller )  onto. It will look like a bunch of death adders at a wedding but it could be done .

I am thinking in the interim I will link the existing vent tube onto the small diameter balance line between the overflow and swirl tank just for the time being. It should still be able to vent OK that way. 

I will run it before I start changing it  and see what the cooling performance is like as I would like to keep it pretty stock. 

The water here is pretty high in minerals so I will use demin water to give everything a fighting chance on the first fill. 

 I intend to use a vacuum fill unit for the first  fill which I will do in the stock system configuration. Hopefully that will  pull out any air pesky pockets. 

 

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