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Thread: Coolant flow diagram/theory and thermostat placement

  1. #1
    Join Date
    Oct 2020
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    Chandler Arizona
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    Coolant flow diagram/theory and thermostat placement

    Hi Guys,
    I am trying to gain a good understanding of coolant flow in my 03 Marauder... before I drop in the new reisch 170 tstat. I want to make sure I put it in right position wise, but I also want to know "why".
    Anyone versed enough to explain?
    FYI - I have installed the mod connecting coolant flow between the rears of the cylinder heads.
    Also, since I'm still building, I have no coolant in the system right now.

    Thanks
    -KK

  2. #2
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    Your in luck as I just changed all my hoses and installed a new Reisch 170 stst.

    List of the hoses you'll need:

    Lower radiator to thermostat housing: Gates 22812
    Crossover to top of radiator: Gates 22810
    Crossover to thermostat housing: Dayco C70986
    Oil cooler to thermostat housing: Dayco E72103 (you will only need a portion of this hose), lower radiator hose for a 2004 Lexus GS300. Reuse the old spring
    Reisch Performance Thermostat: FORD-4D
    All other hoses are bulk items at any FLAPS

    The thermostat actually mounts upside down. The top of the thermostat (part with the arch) will be facing towards the ground. The threads of the thermostat housing bolts will be pointed up.

    BTW... your tune needs to be adjusted per Reisch's recommendations.

    Any questions, ask away.
    Last edited by fastblackmerc; 11-18-2020 at 07:48 AM. Reason: Added verbage about Lexus
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  3. #3
    Join Date
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    Location
    Woodbridge, VA
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    The system is set up to circulate the water just thru the engine until it warms up. Then the t stat opens to circulate thru the radiator to keep the engine at the proper temp. Its done this way for emissions to get the engine up to temp quicker.
    ~Chris

  4. #4
    Join Date
    Oct 2020
    Location
    Chandler Arizona
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    Thanks fastblack!
    Based on your reply, looks like I did put it in correctly. I noticed that even in the "closed" position, it looks like the tstat allows flow back through the shorty hose to the block connection near the oil filter...this must be the method for block/head recirc until the tstat opens?

    As far as the tune due to the Reisch addition, ..oh yeah. Adding a V7-JT supercharger as well.

    I am wondering, is this tuning something I can do...I've read several "professionals only" comments; True?

    Thanks again

  5. #5
    Join Date
    Jun 2011
    Location
    Northeast OH
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    7,666
    I wouldn't recommend tuning a blower car yourself. Air/fuel/timing is critical..see member here Marty Ochs or call them, Mo's Speed shop, Dallas,GA. they can give you a base tune then adjust by you datalogging
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  6. #6
    Join Date
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    I wouldn't recommend attempting to tune it yourself. Get a good base tune from MartyO then take to get a final dialed-in tune.
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  7. #7
    Join Date
    Oct 2008
    Location
    Toronto, ON
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    Quote Originally Posted by Blown3.8 View Post
    Its done this way for emissions to get the engine up to temp quicker.
    This system also gets heat blowing into the cabin much quicker in cold weather.

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