I have a '63 cad Series 62. I was wondering if these cars had anti-freeze over flow collection bottles? When I turn my car off anti-freeze runs out of the over flow hose. If not is it ok to put one in?

Thanks, Kevin                         

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Comment by Tony and Ginny 429 on March 20, 2021 at 12:03pm

Old  radiator coolant will not exchange heat as it was designed to 

It looses it ability to do that over time and SB changed when due ( maintenance ) 
What is your temp gauge reading at operating temp ? ( which I asked before ) 

It SB just past the first quarter mark on the gauge when correct which is about 180 degrees 

The half way point on the gauge is 200 degrees and hotter than your temp SB 

Do examine the the seal surface of the rad cap to the rad 


Comment by Kurt on March 20, 2021 at 11:44am

Spec for the cap is 13 1/2 to 16 1/2 lbs so you're good there. I would think that the seals are a standard size. Check the radiator filler neck for imperfections. Does the car run hot? 

Comment by Kevin Kennedy on March 20, 2021 at 10:32am

Would a wrong radiator cap cause this problem? The one I have is rated at 16# and I did put a new one on last summer with the same results. I'm wondering if the cap seal is not the right size.

Comment by Kurt on March 16, 2021 at 12:56am

They did not have overflow bottles back then. There are several aftermarket bottles available. I got one at Autozone and installed where the voltage regulator used to be (now have internally regulated alternator).

Comment by Tony and Ginny 429 on March 16, 2021 at 12:45am


The car did not come with an overflow collection bottle in these years 

I do have an overflow bottle I put in my 64 

If your cooling system is overflowing when you shut the car off you are having an issue with the cars cooling system running to hot that you should look into 

Where does your car run on the  dash temp gauge ?



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