1970 472 Overheat Problem

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  1. #1
    jdcad is offline Cadillac Owners Member
    Automobile(s): 1956 Eldo, 1963 Coupe, 1968 Eldo, 1979 Seville
    Join Date
    Mar 2009
    Niagara Falls, NY

    Question1970 472 Overheat Problem

    In April of 2009, I did a complete rebuild of my 472. The sole reason for the rebuild was to eliminate a few bothersome oil leaks. The car has been in the family for 25 years and aside from the leaks, was a superb running Coupe.
    The engine has about 800 miles on it now since the rebuild, and I've had this overheat problem since it was first started. During that time, I have run a complete battery of tests and consulted with engine builders from the US and the UK. The car still overheats. The thermostat is 160°, and the overheat problem fluctuates between 180° and 240°.
    I would like to contact a 472 expert from this site to review all of the tests and measurements that I have performed, in hopes, that there is some additional expertise out there that can help me through this problem. Please contact me via email and give me a phone number. I will email a list of the past 8 months of activities.

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  3. #2
    Angry Matt's Avatar
    Angry Matt is offline Cadillac Owners Enthusiast
    Automobile(s): (2) '81 FWBs, '86 Cutlass Supreme
    Join Date
    May 2009
    Limerick, PA

    Re: 1970 472 Overheat Problem

    The thermostats for the cadillac are specific to the cadillac in those motors, did you buy one from a parts store? They usually sell generic GM stats that don't have the necessary ports. I bought the wrong one years ago, but I don't remember if it caused overheating. MTS sells the proper one and the forum is full of 472 experts.

  4. #3
    cadillac_al is offline Cadillac Owners Connoisseur
    Automobile(s): 70 Deville 77 Fleet 78 Seville 92 Deville 03 Deville
    Join Date
    Feb 2007

    Re: 1970 472 Overheat Problem

    Is the radiator 40 years old? If so I would be very suspicious of it's condition.

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