Hey guys. I have a 3 core champion radiator. My 87 GT is a manual so I won’t utilize the two extra holes in it.

Does anyone have a link to the plugs I need to buy to plug them?

I got a couple brass plugs from Home Depot but nothing I found there is seeming to work.

I misplaced the plastic plugs and installed it with no plugs of any kind.

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88GT 355 CI, AED HO 750 Double Pumper, AFR milled 180, Dyno'd at 427 HP, 360 WHP, F40 6-Spd
anderson@gdsconsulting.com

they don't need to be plugged

Awesome. Thx for the quick response. I’ll go ahead and install the radiator then!

I believe the size of the threads for the Champion Radiator trans cooler fittings are 1/8 NPT . Should you choose to plug them pipe plugs in that size are readily available. You could leave them open and the radiator would not leak but I believe its a good idea to plug them

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

I have read on this forum that some recommend plugging them to prevent oxidation inside that can possibly cause leaks in the future. Since they are made for transmission fluid, that might be a good thing to use to fill the tank on the side of the radiator then install the plugs. I suppose you could also use an antifreeze solution, too.

If you do put liquid in the cooler be sure to leave enough air space to allow for thermal expansion. If you fill it completely with liquid, it likely will rupture. I would just leave it empty and plug them. Then later on, it could be used with an automatic and have a clean cooler.

Marc