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Technical Cadillac high flow thermostat

Discussion in 'The Hokey Ass Message Board' started by HotRodToomer, Aug 9, 2015.

  1. HotRodToomer
    Joined: Jun 25, 2006
    Posts: 857


    I did a little searching but didn't find anything about it so I thought I'd share.

    Since I redid the Cadillac's engine, a 1957 365 c.i., punched .030 and a little head work, Its run about 210 degrees constant. Good coolant, rebuilt water pump, stock fan & a cleaned original 53' radiator with a 9-LBS cap.

    Its never overheated, never had an issue, but I always wanted it a bit cooler.

    So while at the NAPA that did my engine work the other day I was looking at the Mr. Gasket section, (Needed valve cover hold downs for my dads 63' Impala), I noticed the 180 degree Big block Mopar high flow stat. Had them grab a 57' Cadillac O.E.M. thermostat off the shelf and measured them, identical diameter. Got home, test fit it in the car, bolted it all back together & topped it off.

    185 is the max it will go. I haven't had a chance to test it out more with some driving but I thought it was worth mention, considering the ease of dropping a few degrees off the gauge. Hope its useful!
    thermosta 2.jpg thermostat 3.jpg Thermostat.jpg
    Dave Mc likes this.
  2. 1941coupe
    Joined: Jul 4, 2010
    Posts: 402


    thanks for
    HotRodToomer likes this.

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