thermostat for north star
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Northstar Engines and System Technical Discussion Discussion, thermostat for north star in Cadillac Engine Technical Discussion; Getting some parts for my newly rebuilt engine, the local parts store the only thermostat that is available for the ...
  1. #1
    denscor is offline Cadillac Owners Fanatic
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    thermostat for north star

    Getting some parts for my newly rebuilt engine, the local parts store the only thermostat that is available for the north star is a 180 degrees this correct?seems little cool to me.Also would you use AC water pump or cardone brand. I have heard that AC plug wires are the only way to go.Thanks

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  3. #2
    El Dobro's Avatar
    El Dobro is offline Cadillac Owners Connoisseur
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    Re: thermostat for north star

    The service manual says the operating range of the thermostat is from 188 degrees to 206, so I would say it's a 190. Just play it safe and put all Delco parts on the engine.

  4. #3
    clarkz71's Avatar
    clarkz71 is offline Cadillac Owners Connoisseur
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    Re: thermostat for north star

    The proper thermostat is in fact a 180 deg. If you go to the AC Delco web page and look up the thermostat for a N* it's a 131-128 and it says 180. Not only that but Stant mfg's the thermostat for AC Delco. So you can use a Stant 14228 180 thermostat. How do I know this? I bought both parts to compare. They are identical.

    From AC Delco web site: 131-128 is w/o gasket or 12TH11D with gasket.

    1995 CADILLAC ELDORADO V8 4.6L 281cid GAS FI N Engine VIN = Y
    Qty Req Qty ACDelco Part# Description
    COOLING SYSTEM / THERMOSTAT
    01 131-128 THERMOSTAT,ENG COOL
    LESS GASKET
    01 12TH11D THERMOSTAT,ENG COOL(W/GSKT) ALL MAKES-STD LINE
    RECOMMENDED TEMP 180 DEGREE INCLUDES SEAL

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