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Thread: Junker turned daily driver.

  1. #151




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    get a 192 degree reverse flow thermostat - it gives higher flow with the higher temp for winter. The 2.6 motors run best with the 192 / 195 stats. The 180 stats were stock on the 79 - 80 2.6 motors - I changed Geronimo's after the first winter to get heat, and never went back to a 180.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  2. #152

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    Raymond New Hampshire, USA
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    1989 Dodge Ram 50
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    Pennyman, what is a reverse flow thermostat? Every thermostat I've put in my truck does a strange thing. Starting from dead cold, the coolant will reach 210-220 degrees before the thermostat opens and it drops down to 190-195. Not to hi-jack, but does anyone know what causes this?

  3. #153

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    Is it because there's cold coolant above the thermostat acting like a thermal heat sink on the thermostat itself? The coolant below it is reaching operating temperature which the gauge sender is reading correctly. A theory...
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  4. #154

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    The thermostat opening point is the point where it starts opening. Add another 10degrees and it will be fully open. So a 190 might not be fully open till 200 or so

  5. #155

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    1987 Mitsubishi Mighty Max
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    Believe I'm going back to the 192 it is staying cooler now and isn't warming up at all in the morning and this evening driving around after work it still wasn't reading hot enough.

  6. #156

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    1987 Mitsubishi Mighty Max
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    And I'm glad I have a spare fuel pump ready. The setup I have now pumps really hard in the morning when it's cool and in the evening it's not pumping near enough. It night and day difference from morning to evening.

  7. #157




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    a reverse flow thermostat refers to the valve that opens and closes - the valve opens in reverse of the standard stat in the direction of flow instead of against it, allowing for unrestricted flow when open.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  8. #158

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    Quote Originally Posted by geezer101 View Post
    Is it because there's cold coolant above the thermostat acting like a thermal heat sink on the thermostat itself? The coolant below it is reaching operating temperature which the gauge sender is reading correctly. A theory...
    That makes sense, because if the truck has been sitting for long enough that the temp is near the bottom of the gauge, it will get up to operating and stay there without the temp spike. Enough heat surrounding the thermostat that it does it's normal thing.
    Pennyman, do you have a link to one of these reverse flow thermostats? Next time I replace mine I think i'll go that route.
    And Junker, A new fuel pump might have an effect on your lean spots. The Weber's are pretty sensitive to fuel pressure and adequate flow. Maybe the pump is getting weak on you once you have some under hood heat on the highway?

  9. #159




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    Here is a link - search for a better price:https://www.ebay.com/itm/Stant-45869...AAAOSwe25bIqXr
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  10. #160

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    I got the same one for rock auto for 5 bucks last year. Guess I have been running a reverse flow all along

  11. #161

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    What size fuel line do y'all recomend for installing one of the carbole pumps back by the fuel tank? I thought I read where someone said 3/8. Trying to figure out which size to keep down on pressure loss.

  12. #162




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    3/8ths is too big for that pump - use 5/16ths.
    Last edited by pennyman1; 10-12-2018 at 05:15 PM.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  13. #163

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    I may need to tackle it in the morning went on a quick run this evening and could barely get over 2 grand before it would lean out.

  14. #164




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    the pump is too small for that 3/8th line - too much pressure drop. You would need a pump with 2 - 3 times the GPH of that pump to keep the line full...
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

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