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Thread: A Couple of Thermostat Questions

  1. #1

    FederalSecurity's Avatar
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    A Couple of Thermostat Questions

    Has anyone with a Second Generation Accord found any aftermarket thermostats for other cars that also fit our cars?

    Also, which thermostat brands made for our cars does everyone prefer?
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)



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    LX User 2geeSEi's Avatar
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    Re: A Couple of Thermostat Questions

    They use a fairly standard thermostat. What are you trying to accomplish? I just use ones with the OE recommended temp. I think the last one I got was Stant.

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    FederalSecurity's Avatar
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    Re: A Couple of Thermostat Questions

    Quote Originally Posted by 2geeSEi View Post
    They use a fairly standard thermostat. What are you trying to accomplish? I just use ones with the OE recommended temp. I think the last one I got was Stant.
    Since I'm in the process of trying to repair the cooling system in the '85, I figure I'd start asking around to find out if

    there are any upgrades that we can do to our cooling systems, including thermostats, radiators, fans, water pumps, etc.
    Last edited by FederalSecurity; 04-22-2014 at 08:18 AM.
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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    FederalSecurity's Avatar
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    Re: A Couple of Thermostat Questions

    I've also been reading some posts on Prelude Power on lower temp thermostats vs. OEM thermostats and I'm not quite sure that

    the lower temp thermostats would be of any benefit.

    160 degree thermostat - Honda Prelude Forum : Honda Prelude Forums
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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    FederalSecurity's Avatar
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    Re: A Couple of Thermostat Questions

    The issue that I'm having is that the engine is getting way too hot, and I've noticed that the radiator fan isn't turning

    on. I pulled the radiator and fan out and hooked the fan motor up to the battery with jumper wires and the fan motor works

    just fine. Tonight when I get home from work I hope there's enough sunlight left to figure out how to test the fan relay

    circuits and the relay itself.
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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    LX User 2geeSEi's Avatar
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    Re: A Couple of Thermostat Questions

    Don't do the lower temp thermostat. All the thermostat dictates is the minimum temp, not the max. With the fans, you may have a problem with the temperature switch on the radiator, or the fan relay. The easiest way to find whether the problem is with the temp switch is to unplug it and jump the terminals in the connector. If the fan turns on, replace the switch. Also, the 1985 USDM service manual is here: Honda service manuals - The 3geez Wiki. Go to the Heating & Air Conditioning section and there are procedures for testing the relay (if you have a 82-83, your engine is different, but the procedures should be similar). I would also give the whole system a good flush, take the radiator out, hold it upside-down and flush water through the outlet until you don't see any flakes of anything coming out of the filler neck or inlet.

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    LX User 2geeSEi's Avatar
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    Re: A Couple of Thermostat Questions

    BTW, when working properly, the cooling systems in these are more than adequate, even in 105-110 temps.

  8. #8

    FederalSecurity's Avatar
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    Re: A Couple of Thermostat Questions

    Quote Originally Posted by 2geeSEi View Post
    Don't do the lower temp thermostat. All the thermostat dictates is the minimum temp, not the max. With the fans, you may have a problem with the temperature switch on the radiator, or the fan relay. The easiest way to find whether the problem is with the temp switch is to unplug it and jump the terminals in the connector. If the fan turns on, replace the switch. Also, the 1985 USDM service manual is here: Honda service manuals - The 3geez Wiki. Go to the Heating & Air Conditioning section and there are procedures for testing the relay (if you have a 82-83, your engine is different, but the procedures should be similar). I would also give the whole system a good flush, take the radiator out, hold it upside-down and flush water through the outlet until you don't see any flakes of anything coming out of the filler neck or inlet.
    I'll test the temperature switch tonight and let you know what happens. As far as flushing the system goes, the first thing I tried was

    draining the old coolant, flushing the entire system, filling the system with new coolant, and bleeding any air in the system hoping it

    would be an easy fix. No such luck. Thanks for the responses on this, 2geeSEi.
    Last edited by FederalSecurity; 04-22-2014 at 10:23 AM.
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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    Re: A Couple of Thermostat Questions

    I tested the relay last night and determined that the relay is good. I had plans to test the temperature switch last night, but ended up

    changing the ATF in the '88 Accord instead. Tonight I jumped the temperature switch connector and the fans came to life. I have

    another temperature switch laying around in the shop and will use that one tomorrow afternoon. Thanks again, 2geeSEi.
    Last edited by FederalSecurity; 04-24-2014 at 07:24 AM.
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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    Dr_Snooz's Avatar
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    Re: A Couple of Thermostat Questions

    Quote Originally Posted by 2geeSEi View Post
    The easiest way to find whether the problem is with the temp switch is to unplug it and jump the terminals in the connector. If the fan turns on, replace the switch.
    Assuming that the coolant is at or above the temp where the fans should come on, this is a good test.
    Dr_Snooz

    "I like to take hammers, and just break stuff, just break stuff." - Beavis


    1989 Honda Accord LX-i Coupe, 240k miles, MT swap, rear disc swap

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    Re: A Couple of Thermostat Questions

    Quote Originally Posted by Dr_Snooz View Post
    Assuming that the coolant is at or above the temp where the fans should come on, this is a good test.
    This is one of the reasons why I prefer these older vehicles to the "over-computerized" newer vehicles. It's just so much easier working on them yourself.
    1988 Honda Accord LX-i Coupe
    1985 Honda Accord LX Sedan
    2000 Pontiac Trans Am LS1 Convertible
    1984 Toyota Celica GT Hatchback
    1988 Honda Accord LX-i Coupe (R.I.P.)

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