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1/2" it is. I am 2 provinces away from the car, didn't actually get to look.

One is 5/8", I believe the other is 3/8".

Not sure why anyone would think a 318 rad on a 318 would cause it to overheat. Joe has a couple factory big block C bodies with slant 6 sized rads, and they'll run all day without overheating.

Look at the back of your cluster. There will be some screws going into the printed circuit board which ground it to the cluster, which is supposed to be grounded through the dash. Use some stake-on's and wire and make a ground lead. Attach one end to the screw I mentioned, and the other to the...

Thanks for all the responses. It idles at about 650-750 RPM.

I'm not concerned with it running at 190, I was just curious as to why its hotter than others around me, even though my cooling system is more advanced. I am however a little concerned with how much it rises. Today I drove a 1/2 hour on the highway, and idled through a parking lot. Within 5...

Thanks for the responses, I'll give those a try.

It's an aftermarket gauge with numbers, but I'm not sure how accurate it is? When I put the stat in water, I tested 2 others at the same time and they all opened at the same time, the same distance. One was new, the others were known to work. I edited my original post, timing is there.

Engine is new build, only about 1500 miles on it.

Hey, I've got a question about my cooling system. I'm not necessarily worried about the temp it runs at, however I don't understand why it's running a bit hot. Here's the deal. 1970 Dart 340, 727, 3.23SG 10.5:1 pistons Comp Cams 280/480 (????) .. Can't remember specs.. Edelbrock air gap...

Check out Champion Radiators. There is a thread on FABO about them and they are sold by member Challengergary.

Ahh, can't remember the part #, but its stock A body width. In a 70 Dart with a 340.

Well, I just bought an aluminum Champion radiator from ChallengerGary for $274 shipped. 22" 3 core.

Could you give me the name of the radiator you bought, or where to find it? Thanks.

But what are some pros and cons to aluminum vs factory?

I need your guys' opinions on radiators. I have a 340 being built, roughly 400HP. I don't have a radiator yet for it, but was wondering what you guys think I should go with. Stock 340 rad? Or aluminum? Or what? I read elsewhere that Challengergary is a rep for Champion Radiators, anyone suggest...

I took it in to get recored, and found out the whole thing is clogged. I also found more leaks in the fins when we pressurized it, and noticed that at one point in time, it had hit the fan while the fan was spinning. I am picking up my reman tomorrow. Also, I haven't heard of cracking an egg...

Stupid stupid stupid me.. :angry7: Not even going to say what happened, but I managed to push in a few of the fins in on the rad for the 273. Coolant is leaking out of where the fins got pushed in now. I thought I could just change it out for the rad in the Dart, but wouldn't you know it, the...

I will try draining the rad, is there anything you can flush the rad with? The water pump is from an 85 318, but I'm not sure if someone changed the water pump from the 318 before I got it or not.

It runs warm mainly when sitting at a stop light or idling. Usually when I start driving again it starts to cool off, but lately it will cool off a bit and then stay hot around 200 - 210*. The number on the rad is 3574 637 and then there is another number that has a pentastar and then 20446...

The car has a 318 with 4 bbl and headers, and a stock 318 radiator. It had a 180* thermostat and for a while wouldn't run any hotter than 185*. Now (I figure since its summerish and hotter out) it's running around 200 - 210* so I changed it to a 160* thermostat but it still is running 200* ish...

Haha, no problem. Who cares if they're ugly, they work. As for which one to turn, try keeping the smaller one that goes into the rad from turning, and turn the larger line nut.

Hahahaha do you guys mean like this?..

I have found that using some kind of penetrating spray works great to sort of un seize the lines because it's probably been how long since they were last removed? Then put both wrenches on both nuts. I like to hold the little one in one place while turning the larger one. Remember, lefty...

i too am jelous of that working gas gauge!