which way should the thermostat sit, 318 Cui.

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    Author Topic: which way should the thermostat sit, 318 Cui.  (Read 4258 times)

    Offline Danishmopar

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    which way should the thermostat sit, 318 Cui.
    « on: April 08, 2009 - 04:08:04 PM »

    Hi Guys..

    After my first start up after 8 years on my 318 70´ Challenger its running a littel hot. so just to be sure will hear you Guys which way should the thermostat sit.

    The elektric fan start after 6-8 minutes at idle. The fan swich start at 185 degrees F

    Thanks Guys
    « Last Edit: April 08, 2009 - 04:13:56 PM by Danishmopar »
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    Offline 67vertman

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #1 on: April 08, 2009 - 05:16:00 PM »
    The spring should be down in the block.  Most thermosatats have an arrow on them showing flow direction.
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    Ron - Born and raised in Southern California

    I got the 1970 Cuda, but still need the hot blonde to ride shotgun!

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    Offline Chryco Psycho

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #2 on: April 08, 2009 - 07:18:37 PM »
    larger squared end is down
    tapered end is up
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    Offline Danishmopar

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #3 on: April 10, 2009 - 02:51:30 PM »


    Hi Guys

    Thanks for the back up.

    The new thermostat was a 180 f with that its running a littel hot at idle. Just mountet a 160 f and its it look better. what thermostat do you guys recomment..

    Thanks Guys  :cheers:
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    Work and Supportet your forces at 821st Air Base Group. Thule AB, Greenland
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    Offline ted

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #4 on: April 10, 2009 - 03:26:20 PM »
    a 160 will not lower the max operating temp
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    Offline MEK-Dangerfield

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #5 on: April 10, 2009 - 03:52:36 PM »
    I have a 180* thermostat. I believe that is the norm, but I don't think a 160* is the way to go.   :2cents:

    Maybe you have other issues with the cooling system? Have you actually driven the car, or is all this from just letting it idle? If so, you really need to drive it to know what you have.


      Mike
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    Mike

    1970 Challenger - SOLD
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    Offline Danishmopar

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    • 70´ Challenger. Denmark, scandinavien.
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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #6 on: April 10, 2009 - 04:15:41 PM »


    HI..

    I have not test driven the car yet. but The Cooling system are all new. I Think I will let it be to i have the car out for a spind...

    Thanks Guys  :2thumbs:
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    Work and Supportet your forces at 821st Air Base Group. Thule AB, Greenland
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    Offline dodge freak 2

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #7 on: April 10, 2009 - 08:26:49 PM »
    I like electric fans but they do have a hard time cooling when standing still. At 20-25 mph or more its fine but not stop.

    I run a 160 T stat year round but in the cold Fall and early spring time I stick some cardboard in front of the rad.....did you know in marine boats the 318 motor is common and there are even 140 T stats....but the cooling is way different were the water cools off the exhaust manifolds too.

    In the summer I like 160 T stats....180 works but has little margin if you get in to stop and go traffic...unless you are runing dual electric fans with a shroud or a mechanical fan with a shroud.   
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    Offline Chryco Psycho

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #8 on: April 11, 2009 - 08:58:58 PM »
    I always run 180* , too cool is not good
    if it is running hot with a 180* the cooling system is not efficient enough
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    Offline dodge freak 2

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    Re: which way should the thermostat sit, 318 Cui.
    « Reply #9 on: April 11, 2009 - 10:33:40 PM »
    But I like running the exhaust intake heat to help vaporize the fuel so it can burn, if the intake is cold then I would run a 180 in the summer and a 195 even in the cool weather.

    Maybe Michigan gasoline is different but I have no problems with vapor lock even in upper 80 degree weather which is about as hot as it gets here...even then the nights cool off in to the 60's, that is why I found its best to leave the exhaust heat passage open on the intake and just use a compost gasket under the carb. 
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