Super a radiator question

I have a Super A, no water pump. I managed to poke a hole in the radiator with a screwdriver..a small hole. Took it to a radiator repair...they tell me it cannot be repaired.

Well, it really looks kinda corroded in and out, so ok, time for a new one I guess. I specified I had the no-water pump early SA.

It get the new one home and notice that the upper hose is 21/4" while the lower is 2". On the tractor both upper and lower are 2". Also I notice that the tube configuration is different on the new one. There are 4 rows of smaller tubes running vertically offset from each other. The original radiator has 2 flat tubes one in front of the other.

Doing a little checking, this new rad is for the later Super A's with the water pump. Tells me it is the same as the early no water pump radiators, except for the top hose being 2 1/4" What everyone does is get a exhaust reducer, 2 1/4 to 2" and use that to hook up the upper hose.


Correct me if I am wrong, but aren't the later (with water pump) Super A's use a pressurized cooling system and the non water pump SA's are not pressurized, using a thermosiphon method to circulate the coolant.

So, the question is......is the different tube configuration on this new radiator a problem......seems to me it was designed with a pressurized, water pump driven system in mind, not a thermosipon system.

Thanks for you thoughts.

Scott

no problem.just make sure to use the non pressure cap.

Thanks Tim. I'll get the exhaust reducer and finish this tomorrow eve.

Cheers

no problem..when you fill it with rad.fluid,it will spill outa the over flow and find its own level where it wants to be..because its not pressurized.youll see..

Actually.....wouldn't the four row verses a two row radiator work better? Bet it does.

(quoted from post at 20:04:21 03/30/15) Actually.....wouldn't the four row verses a two row radiator work better? Bet it does.

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Might be better, but was I was thinking was would the water flow down through the radiator be restricted due to having smaller tubes and no pressure from a water pump pushing the coolant through those smaller passages. Then again again, there is more surface area using more tubes.

I also so some questioning this on some model t forums, since the t's used a thermosiphon system also.

However, in either case, I'm now sure it would be fine either way, as you say maybe even better.

Thanks.

Scott,I have dealt with these old tractors as much as anyone,and worked in a radiator shop.I have always preached to work with what you have.If your radiator couldn't be fixed do a recore,using your tanks and frame,might cost more but your aggravation is costly also.

jimmy

Scott

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I thought the tractors of that model with the water pump had taller radiators (and therefore taller nose's, gas tanks, etc.)???

Correct me if I'm wrong, but you need to check the height of the radiator compared to your old one.

That's true on the C to SC for sure. Don't know on the A's

(quoted from post at 01:08:30 04/02/15) That's true on the C to SC for sure. Don't know on the A's

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I've never owned a Super A with a waterpump myself (Super A-1) but I have had several Super A's, 100's, and 140's and the 100's through 140's have the water pump and have taller radiators. I wouldn't think the Super A-1 would be any different!

I don't know why people say that a pressurized radiator system will not work with a thermosiphon system with no water pump. I like it better as I have trouble on the hills with the non
pressurized caps in that the coolant wants to run out going down a steep hill. The physics of thermosiphon don't care what the pressure is in the system. It circulates because as the
water heats up it rises and flows into the top of the radiator regardless of the system pressure. I have several tractors with pressurized system with no water pump and have never had any
cooling problems.