Updated Coolant Hose Master List (3.0 & 3.2)

Discussion in 'Gen 1 & 2 - Engine, Exhaust, Drive Line & AC syste' started by Irish Pride, Apr 12, 2019.

  1. Irish Pride

    Irish Pride Irish Inside Staff Member Super Moderators

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    This is a master list of coolant hoses that I've compiled for the Yamaha V6. This information is posted in various places on the forum but a lot of manufacturers have stopped producing so some of the part numbers are no longer relevant. For that reason I've compiled the list using only Gates part numbers. These numbers can easily be crossed over to other part numbers but Gates seems to be the only company actively making these hoses and are still readily available at most parts houses and online.

    Radiator Hose
    3.0 Upper - #21976
    3.2 Upper - #21976 Cut to fit.
    3.0 Lower - #22735
    3.2 Lower - #20538

    Thermostat Housing to Oil Cooler
    3.0 and 3.2 - #18856 (Maybe) There is a slightly different routing based on the coil pack(ATX vs MTX), so this hose may not fit one or the other. Bulk hose can be used no problem.

    Oil Cooler to Block
    3.0 and 3.2 - #18777

    Heater Hoses 3.0 & 3.2
    Pipe 1 (inlet) - #18080 Engine to pipe, cut to fit.
    Pipe 1 (inlet) - #18079 Pipe to core, cut to fit, (possibly MTX only)
    Pipe 1 (inlet) - #18822 Pipe to core, cut to fit, (possibly ATX only)
    Pipe 2 (exit) - #18774 Cut to fit. One end is engine to pipe, other end is pipe to core.

    Bypass Hoses 3.0 & 3.2
    Rear Bank to TB - #18240 Cut to fit.
    TB to Intake - #18020 Cut to fit.
    Intake to Front Bank - #18664 Cut to fit. (unconfirmed). I have my TB bypassed.

    Thermostat Housing Connector, bank 1 to bank 2.
    This hose section is long discontinued. You will need to take your old section up to a parts store and match it up. Gates fuel filler hose works excellent but I cannot remember what size I used.
     
  2. SHOdded

    SHOdded SHO Member Supporting Member

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    Thank you for compiling this list!
     
  3. BaySHO Performance

    BaySHO Performance SHO Member

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    Thanks for the info. I've added what I was missing to my parts master spreadsheet. It covers much more than just hoses. Take a look: https://www.dropbox.com/s/iz0c85idjoi3pa7/Parts.xlsx?dl=0

    Is your 18856 the PCV hose going from the front valve cover to the intake? I use bulk hose for that.
    I have the NAPA eqiuivalent PNs in the spreadsheet, with a note on how to convert them to Gates PNs.
    I can confirm that 18856 fits 3.0 and 3.2.
    I buy hose from Summit Racing for the Thermostat Housing Connector, bank 1 to bank 2.
     
    Dave T, DavidT, SHOdded and 2 others like this.
  4. DavidT

    DavidT SHO Member

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    Great info! Thanks to both of you! Baysho, I thought the fl400s oil filter was for each engine... is it not?


    Sent from my iPhone using Tapatalk
     
  5. BaySHO Performance

    BaySHO Performance SHO Member

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    The fl400s filter can be used for both the 3.0 and 3.2.
     
  6. Irish Pride

    Irish Pride Irish Inside Staff Member Super Moderators

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    I use the FL1A on all mine.

    How did we get on oil filters?
     
  7. BaySHO Performance

    BaySHO Performance SHO Member

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    If you take a look at my Dropbox spreadsheet that contains 22 sheets of part numbers for different parts of the car, you will understand.
     
    SHOdded likes this.
  8. RookieSHO

    RookieSHO New Member

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    do you know the part number or the size for the crossover coolant hose for the 3.0L V6?, it's on the driver side in the middle engine connected to the thermostat housing, the hose is bulging and leaks out whenever the pressure gets too high
     
  9. RookieSHO

    RookieSHO New Member

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    I just re-read the fist post and answer my own question *facepalm*
     
  10. BaySHO Performance

    BaySHO Performance SHO Member

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    SHOdded and zoomlater like this.
  11. NoSlo

    NoSlo GoldMember

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    The hose between "Water Outlet #1" and "Water Outlet Housing" (between the two sides of the V6) is 1.25" hose (likely metric through). Perhaps 2.5 inches long. I opted for Napa Gold braid super reinforced, because replacing that is 4+ hours of labor plus every water gasket on that side of the engine.

    [​IMG]


    I just used 5/8 inch hose for the loop by the oil cooler. Good to have a part number if I want to replace it without a kink in the middle.

    I have the IAC "warmer" bypassed, but the throttle body is easier to leave connected than to try to cap everything effectively. The big stiff crankcase ventilation pipe on the bottom of the throttle body is a bigger annoyance.
     
    SHOdded likes this.

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