Re: Change of radiator core affecting cooling performance in 1949, 23rd series

Posted by Joe D'Agostino On 2017/9/4 16:50:12

Ross,

I was able to measure the temperature delta across the radiator today as follows:

Ambient temperature outside at the time of the test was 79 degrees

After driving around town, the engine was around 178 degrees at the front of engine with the car moving.

Once I pulled in the driveway, I turned on the pusher fan to see if the engine temperature could be held at the 178 degrees or see if the temperature would creep up.

After sitting for about 15 minutes with Pusher fan on:
Top of radiator is 189 degrees
Bottom of radiator is 178 degrees
Engine front is 194 degrees
Engine rear is 207 degrees

So the engine temperature crept up around 16 degrees at idle with the pusher fan on (based on engine front measurements)

I would think that with the pusher fan on at idle the engine temperature should maintain about the same as cruising (when the pusher fan is off). Does that sound correct? Instead I found that the temperature still crept up at idle.

This was done with the hood open. Once I closed the hood, everything went up around another 5 degrees.

Does 11 degrees drop across the radiator sound right from top to bottom? I have read that it should be closer to 20 degrees.

I did not do the test with the pusher fan off at idle since my experience is that the engine would only get hotter and I don't think I want to chance it getting too hot since I just had the engine rebuilt.

I would appreciate your comments.

Thank you