John Deere G aftermarket aluminum radiator

[JohnDeereJimOhio]

How big of an aftermarket aluminum radiator would I need to keep my G cool.. I'm going to run mechanical fan so I can keep my alternator.. My motor isn't anything crazy so it doesn't run super hot, however if I go a lot bigger I'd like to not have to buy another radiator...
Thanks
 

[tim s]

Years ago my Boss who owned the dealership I worked at pulled a G that ran good then,,nothing like they do today, we used a piece of 4" exhaust pipe with fins welded to it and screens on each side to hide it for a radiator, worked out fine for him and got rid of some weight.
 

[JohnDeereJimOhio]

Tim, so he just hooked that into the lower and upper water pipe and ran it like that? I would think that one of the new aluminum rads should be more than enough for mine then
 

[Mike Aylward]

Jim, in my 70 pulling tractor I use a radiator out of a 4300 compact utility tractor along with an electric water pump and gate valve to control flow. I use a model B fan on the fan shaft and also an electric fan up front. It stays cool unless I have prolonged idling and then it warms up. Mike
 

[JohnDeereJimOhio]

Mike would it be too much trouble to ask u for a few pics? Also does the 70 have the large upper and lower water pipes? How did u neck them down by hose ? Thanks for the reply
 

[Mike Aylward]

I don't have any pics of the setup right here. I remade the upper water pipe and manifold out of lighter weight steel. I used a shorter piece of pipe on the bottom. It was a simple matter to weld a washer on the end of the pipe and then use a pipe nipple the right size for the rest of the plumbing. Mike
 

[Mike Aylward]

Jim, if you like I can take some pics on my phone and send them to you. My email is open if you want to talk privately. Mike
 

[jd b puller]

Jim, the radiator out of a compact will keep a 100HP 2 cyl cool in 100 degree outside temps.
 

[JohnDeereJimOhio]

I found one on eBay this is what it says, think it would be enough capacity?

Specifics and Benefits:

Stronger & Higher Capacity for Coolant than Stock Units
Made of High Quality Full T-6061 Aluminum Construction
Direct Bolt-On OEM Fitment or Replacement
High Performance Euro Spec. 3-Row Racing Design
Overall Size: 14.50" x 16.50" x 2.00"
Core Size: 14.25" x 13.75" x 2.00"
Inlet/Outlet: 1.25"/ 1.25"
Improves cooling by 35 - 45% Temp.
100% Brand New
I think this would be enough, I may be getting talked into a water pump and electric fan as well I just need to figure out how to run my alternator..