I just restored a 65 Mustang Coupe, and am having cooling issues. I installed an aluminum radiator and shroud, with a clutch fan. It still gets hot in stop and go traffic. I am thinking about installing an electric fan made for my radiator from Old Air. Anyone have this problem?

 

Where are you at with the thermostat? I try that before spending a lot of money on an electric fan.

 

1. Install true temp gauge. Stock gauge is not accurate
2. When was the last time you actually flushed the system? Old blocks get rusty and other buildup crap that clogs old and brand new radiators just the same. (was it running hot before the radiator?)
3. Did you recently install a water pump? Does it flow the right way?
4. Did you recently install a thermostat? Is it working?
5. Is you lower radiator hose collapsing? Will the car only get hot in traffic or will it creep up in temp driving at 65 MPH?
6. well...as you can see...there are many things it can be. Start with the First one and then move on

 

Thanks for the input! I think that installing a temp guage is a good idea, then starting with the thermostat. I am using a infarred temperature guage to read the temp at the thermostat housing, and it has reached 230 degrees before I turned the motor off.

I am starting with a rebuilt 302 motor from Jasper, with a new water pump. I will put a spring in the lower hose to make sure it doesn't collapse.

 

check the t-stat first...most people here seem to be running a 180*....yours may not be opening and/or may be too high of a temp.

did you use "radiator stop leak" before replacing it????

Some of my water jackets in my heads were clogged because of that garbage [:@]

 

nevermind....i see that it is rebuilt and new to you

 

I am having similar problems with my 66 289. Cant timing have a lot to do with running too hot, especially with mods (cam, headers, carb, etc.) and boring .030?

Z

 

I won't use radiator stop leak in the future. Dodgestang might be right that I don't know how hot the car is really getting without a proper gauge. The stock gauge goes to half way when I think it is getting too hot. Time for a SunPro.

 

If all the suggestions above haven't helped, then it is time for a good flushing of the entire block. Route around your new radiator and follow the flushing directions. Let the acid sit for quite awhile before flushing with cool water. Hook the radiator back up and fill with distilled water and Water Wetter with a mixture of anti-freeze that suits your climatic conditions. Also, you didn't mention an overflow tank. Get one.....You will have air in the system for awhile, so you will need to burp it. The easiest way is to start it, get it hot, shut it off, get it cool, start it, get it hot, get it cool, etc. That will eventually get all the air out of the system, but you will need a recovery system for this to work.

 

How Do you "FLUSH" car i have a 68 mustang and my radiator water is brown i opend the little nut on the bottom and let the water out then i replace it with water is that flushing?????