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  1. #1
    Join Date
    Jun 2010
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    Santa Rosa Valley, California
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    288

    Default oil cooler baypass thermostat

    just put a oil cooler with fan in my car do i need to run a fluid control thermostat?



  2. #2
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    Jun 2010
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    Santa Rosa Valley, California
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    Default

    Come on guys...

  3. #3
    Join Date
    Sep 2006
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    Austin, TX
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    I'm adding a cooler myself and searched the site to find a few threads about thermostats before I bought. I'm adding an Earl's thermostat oil filter adapter to my car/ Some good points were brought up about keeping oil at temp and even extreme cold causing freezing in the cooler itself. Do a forum search and you'll probably find what you need.

  4. #4
    Join Date
    Jun 2010
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    Santa Rosa Valley, California
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    288

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    thanks i will search, but if thats the reason i live in cali and it hardly freezes here....

  5. #5
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    Mar 2008
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    Chicago suburbs
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    Run a stat. The purpose is to get your oil up to temp quicker and keep it there. Running without a oil or coolant stat is usually a bad idea on the street. Fluid temps that are too cold are bad for a motor- even in cali

  6. #6
    Join Date
    Dec 2009
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    Quote Originally Posted by another69 View Post
    Run a stat. The purpose is to get your oil up to temp quicker and keep it there. Running without a oil or coolant stat is usually a bad idea on the street. Fluid temps that are too cold are bad for a motor- even in cali
    All that, plus you need to get your oil up to temp to evap condensation and keep your oil doing what it's supposed to do...
    Ron in SoCal
    69 Camaro in progress
    http://www.lateral-g.net/forums/showthread.php4?t=31246

    Used to be known as flash911

  7. #7
    Join Date
    Mar 2005
    Location
    Loganville, GA
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    857
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    I run a stat on my oil cooler, the Earls one. Even here in Georgia, it takes a bit to get the oil temp up. The highest the oil temp ever reached was about 190 degrees, which is about where the thermostat opens (Earls lists that is starts opening at 160, fully open at 180). I mostly autocrossed and drove on the street with the car. This was in the El Camino, engine is now in the Camaro with the cooler setup. Note, my oil cooler is probably a bit bigger than it needs to be, contributing to the lower oil temps.
    Last edited by Randy67; 04-25-2012 at 08:33 AM. Reason: correct info
    Randy Pajer
    79 GMC C35 Dually - truck stuff
    81 Camaro - CP car
    99 Bonneville SLE - DD

  8. #8
    Join Date
    Sep 2005
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    Nor Cal
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    A few of us run the Mocal unit (Gitter Dun, sik68, and myself). Vegas69 runs the Earl's unit. I remember he researched and supposedly the Earl's unit controls 100% of the oil flow whereas the Mocal and Cantons allow 10-15% of oil to bypass at all times....

  9. #9
    Join Date
    Jun 2010
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    Georgia
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    I personally would run a thermostat, otherwise as mentioned above you aren't getting the oil up to temp, which is harder on the engine.

    www.RnDFabrication.com
    Custom Radiators, Valve Covers and Overflow Tanks
    Project Sabre





  10. #10
    Join Date
    Jan 2007
    Location
    Middlebury CT
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    645
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    I'm running the filter adapter style with a built in bypass when the oil hits 180F. Now i live in ct and have have cold spring and falls i planned on using some sheet aluminum to block the core to help control the cooling if needed. In the summer months under some heavy loads i was hitting 240F+. I just did a track day and with the outside temps of 60F my car saw oil temps of 200F - 210F it was totally happy. I'm running a setrab oil cooler and its really nicely built.
    ________________
    Nick S.
    Gold/Gray 1967 Camaro

  11. #11
    Join Date
    Sep 2006
    Location
    Henderson,NV
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    Even with my Earls T stat, my car will run to cool in the colder months. It's always run on the cool side but it's worse now. I haven't confirmed that the t stat is or isn't flowing before 185 degrees. I do know that it's designed to prevent thermal shock to the cooler when the t stat opens. That means the feed side to the cooler is open so the oil keeps some temperature in it. The return side is closed but my theory is there is some radiant cooling. I may end up building a shroud for the cold months. You really only want a cooler that is just big enough to do the job. Since I have a snarling big block that creates big heat, I put in a LARGE cooler purposely and wanted to error on the large side since my problem was on the road course.
    Todd

  12. #12
    Join Date
    Jun 2001
    Location
    Los Angeles
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    Big power = big heat = big problems = more heat management.

    The Mocal thermostats do bypass some oil to the cooler at all times. Hence, on mine the oil temperatures are too cold for most street conditions. 180* on a hot day, 140-150* on colder days with the 202*F thermostat. That's too cold. The oil needs to be hot in order to burn off condensation and to have the additive packages work correctly.

    What I'm likely to do is eliminate the thermostat and put in a three-way valve. For street drivng it will bypass the cooler, but for track days all oil will go through cooler. It will require manually operating the valve periodically to have fresh oil circulate through the cooler.
    VaporWorx. We Give You Gas http://www.vaporworx.com
    Carl Casanova's 1968 Camaro

  13. #13
    Join Date
    Jun 2010
    Location
    Santa Rosa Valley, California
    Posts
    288

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    Thanks guys...where is your oil temp sensor located on your engine? my oil temp town driving is about 190 the fan comes on and keeps it at 185 also my cooler in mounted on the left side inner fender hump inside the engine just behind the head lights.

    I really dont think i need the thermostat for my application

  14. #14
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    Sep 2005
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    Nor Cal
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    I was on the fence of where to place my oil temp sensor -- and after researching the ideas were very mixed I found -- I decided to mount mine POST-cooler so I know how well the cooler is working. I used this Joe's Racing part.

    http://www.joesracing.com/index.php?...product_id=752

    Others said they wanted to know the hottest oil that was reaching the engine so mounted it pre-cooler, often on the port off the remote oil filter adapter.

  15. #15
    Join Date
    Jun 2010
    Location
    Santa Rosa Valley, California
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    288

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    so on the line i see....my filter is on the rad core and using a Canton i put my sensor there so its on the line coming from the engine then it goes to the cooler

  16. #16
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    Sep 2006
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    Henderson,NV
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    You left a important piece of information out. ha ha If it's not hanging in the breeze, it's not nearly as important.

    I do agree with Dave, post cooler is where many recommend as that's what most of your internals see. Mines in the pan and my opinion is that any oil temp gauge is better than none! I'm not sure why Dave has one as he thinks pegging it is part of the fun. ha ha
    Todd

  17. #17
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    Sep 2005
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    Nor Cal
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    haha yeah I got a little excited down there didn't I.... dammit.

  18. #18
    Join Date
    Oct 2007
    Location
    Atlanta
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    421
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    Not to hijack at all, but I have a question. I have a new Setrab cooler and a remote filter mount ready to go in, and am going to get the bypass as well. My question is where should I put the bypass? Closest to the engine as it comes out of the filter adapter or up front near the cooler? I was thinking back by the engine to keep the pressure loss to a minimum when it's not going up to the cooler but I don't know that it matters much. Also, should it go from engine to filter to bypass to cooler and back to engine or what is the right order? Thanks a lot. I need to sketch it all out before I order the AN hoses and fittings.

  19. #19
    Join Date
    Oct 2007
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    Atlanta
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    Nevermind, I figured it out.

  20. #20
    Join Date
    Sep 2008
    Location
    JACKSONVILLE, FLORIDA
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    I use a marine billet thermostat. They come apart and are easy to clean.

    http://www.hardin-marine.com/p-14580...12-degree.aspx
    Craig Scholl
    CJD Automotive, LLC
    Jacksonville, Florida
    904-400-1802
    www.cjdautomotive.com
    info@cjdautomotive.com

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