oil cooler lines

Posted by DsM KiD4, Aug 2, 2007
Newbie Forum - Beginner DSM modification questions and discussions. Common, repetitive, and general discussions will get dumped here from other tech forums. Unless you're a Probationary member you shouldn't post threads here.

  1. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    ok i have b&m air to oil cooler with both ports that face upwards. however i have it mounted sideways like this attached pic, is this ok? if this is ok, which line on the air/oil cooler (top or bottom) goes to which port on the 1990 oil filter housing (left or right port)?
    if this is incorrect can someone please let me know how to correct this. thanks in advance.......

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    #1
  2. FonZ454

    FonZ454 Proven Member

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    I run a b and m cooler.

    Top line goes to the right (closer to inside of the car)
    Bottom line goes to the left (front of the car)

    Pretty sure it's the right way, and the car's been driven for 10k miles fine. Good 'mod'.
    #2
  3. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    can someone else agree with that? i just want to make sure its on the rite way thats all...
    #3
  4. hopwoodp

    hopwoodp Proven Member

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    That sound correct to me. To would be feed while bottom is return.
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  5. snox135

    snox135 Proven Member

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    No you want the top to be the return and the bottom the feed. This will ensure the cooler is full of oil. Though I'm not sure which is the feed on the 90 housing.
    #5
  6. Spoolin98

    Spoolin98 Proven Member

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    This is correct, you want the top to be the return and the bottom to be the feed. On the oil housing, the left is outlet and the right is the inlet.

    So...you want the top line to connect to the right and bottom line to connect to the left.

    IM 99.9% sure this is correct, someone correct me if Im wrong.
    #6
  7. hopwoodp

    hopwoodp Proven Member

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    When a line or system is pressurized it doesn't matter. It is if any bit different on initial pressurization that could be affected. To me and what I know, you would want a pretty easy path for the feed to allow "quicker" pressurization. I have spoke to alot of people about this and they will tell you the same thing.
    #7
  8. BUCK

    BUCK Proven Member

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    I always hooked them up like a Radiator - IN at the Top - OUT at the bottom - Your putting the hottest Oil at the top side of the Cooler, not the bottom where the Heat would radiate upwards.
    #8
  9. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    ok so this what he stated above is correct then? air cooler feed = right port on oil filter housing...............and air cooler return = left port on oil filter housing..... right???

    drawing attached..... (air/oil cooler LEFT side) (filter housing on RIGHT)so the lines go like this?

    Attached Files:

    #9
  10. Spoolin98

    Spoolin98 Proven Member

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    Im pretty sure its the oppostie way, the right is the oil cooler return and the left is the feed.

    The purpose of feeding the cooler from the bottom is to prevent air bubbles in the cooler.
    #10
  11. Spoolin98

    Spoolin98 Proven Member

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    From the reading I have done, the oil cooler is only fed oil when the oil thermostat reaches a certain temperature.

    So, every time the thermostat opens the cooler has to be filled, if you fill it from the top, air can be trapped in it. If you fill it from the bottom, there is no way air can be trapped.

    Ex. Say you have a 19 row oil cooler and you feed it from the top. Oil may go down the first 10 rows faster than the last 9 rows and there is a CHANCE air could be trapped in it. Now if you feed the same cooler from the bottom, its like filling a pool, its will fill each row at the same rate.

    Your theory of pressurized systems may be correct for some things, but I disagree with you on this one.
    #11
  12. Spoolin98

    Spoolin98 Proven Member

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    The only time heat would radiate upwards is when your sitting still, which the air oil cooler isnt cooling oil anyway because your not moving. So at a stand still, with the cooler being fed at idle, you are correct, the heat would radiate upwards. While driving the heat would not radiate upwards, which is when the oil cooler is actually cooling.

    If your theory was correct, then wouldnt it make sense to build intercoolers with the inlet
    at the top and the outlet at the bottom? Every intercooler I have seen that ran top to bottom, like the stock side mount coolers, are fed air from the bottom and the outlet is at the top. Obviously not so air doesnt get trapped in it, but because the only time the intercooler is cooling is while your driving. Basically what Im saying is, I dont think it matters if the heat radiates upwards from the bottom of any air cooler because it will only happen while sitting still, which the cooler is not being affective at that point anyway.
    #12
  13. hopwoodp

    hopwoodp Proven Member

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    Wait, are you talking about the 1990 style oil cooler bracket and hook up and some kind of external setup that involves a bracket hooked up to the oil filter that runs lines in and out?
    #13
  14. Spoolin98

    Spoolin98 Proven Member

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    Im talking about the 90 style oil filter housing with an external oil cooler.
    #14
  15. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    ok so i have one person tellin me one way and the other person saying the other way LOL. so what way is suppose to go for sure?????????????////
    #15
  16. BUCK

    BUCK Proven Member

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    http://www.dsmtuners.com/forums/showthread.php?t=220259

    The Big Mavisky speaks...
    #16
  17. FonZ454

    FonZ454 Proven Member

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    [​IMG]

    Mine. pretty sure I used mavinsky's guide as a...guide.
    #17
  18. Spoolin98

    Spoolin98 Proven Member

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    You just proved that how you said to hook up the lines is wrong.

    "If fed from the sides the feed line needs to be on bottom and the return line on top. This guarantees that no air bubbles will be trapped in the cooler rendering it less effective"

    "Remember the front fitting on the housing (left) is the feed line and the rear fitting (right) is the return"

    This is exactly what I posted earlier.
    #18
  19. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    so it goes like this then? left port on oil housing goes to bottom of oil cooler...top oil cooler goes to right port on oil housing?

    Attached Files:

    #19
  20. Spoolin98

    Spoolin98 Proven Member

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    Correct.
    #20
  21. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    well i changed it to the diagram i drew in post #19. thanks spoolin and everyone else who helped.
    #21
  22. Spoolin98

    Spoolin98 Proven Member

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    :thumb:
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  23. 95EclipseGST

    95EclipseGST Proven Member

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    So did the method in post 19 prove to be better than Mavisky's method which is the opposite way? I just want to double check so i do this right. Thanks
    #23
  24. DsM KiD4

    DsM KiD4 Awaiting Email Verification

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    ya it workd for me
    #24
  25. mavisky

    mavisky DSM Wiseman

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    Post 19 is the way I said to do it. Left fitting feeds the oil cooler, right fitting accepts the return from the fitting.
    #25

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