Radiator for MM

boise-nic · Post by **boise-nic** » Thu Apr 16, 2009 7:40 pm

I am far from finished with my 4g swap but I am wordering about cooling issues. Looking at the radiator on the talon, it seems larger in every respect when compared to the mm. Do most people run a custom radiator with a larger heat rejection capacity or does the stock one squeak by ok? I know the answer is contingent on several factors so here is what I plan for a setup...

...no A/C radiator
...high volume slim line fan
...large FMIC (probably too large).
...Running a 16G.

I am thinking the stock radiator would be fine for putting around town seeing that the 4g not under boost won't put out any more heat than the mornal motor. And unless you want to go to jail, I don't think it would see boost for more than 5-10 seconds at a time.

But, I'd like to know for sure how the stocker performs.

4g63mightymax · Post by **4g63mightymax** » Fri Apr 17, 2009 9:51 am

I have been using the stock 1989 d50 radiator with an electric fan for 3 years, and have never overheated. Just make sure you don't have any air bubbles in the cooling system, and you are good to go. When this one eventually breaks, I will be buying a new stock radiator to go in its place. It fits and it works, just use it

-Jeremy

kurb_appeal · Post by **kurb_appeal** » Sat Apr 18, 2009 12:28 am

Like stated above, make sure your cooling system is up to par. I have used a stock radiator in every car I have built, one being a 653 awhp wrx, and never had a problem.

And actually around town is where you will the most issues if any at all. The stop and go leaves a lack of air flow over the radiator and causes extra pressure from the heat and will boil the coolant out of the over flow.

But really if you are worried about the stock radiator have it looked at by your local shop for corrosion and holes, have it fixed and cleaned and throw it in.

89coltgt · Post by **89coltgt** » Sat Apr 18, 2009 1:12 pm

You should be fine with the stock rad. There are alot of guys running the honda 1/2 radiators on highly modified 4g's.

boise-nic · Post by **boise-nic** » Wed Apr 29, 2009 7:27 pm

Thanks for all the comments. My main goal is to make the truck as reliable as possible which means driving it in 100+ degree heat. I think I'm on the right track...flush the stock radiator, low temp thermostat, water wetter, and a large slimline fan should be fine.

I got my logic turned around for a sec...I would of though an engine under WOT would reject a lot more heat into the cooling system than an idling engine in traffic. But what Kurb_apeal said makes sense now.