Westerbeke 4.5kw Gen losing coolant

Discussion in 'Electrical Stuff' started by AllTideUp, Dec 19, 2017.

  1. AllTideUp

    AllTideUp Member

    150
    May 6, 2013
    Northern Virginia
    2001 SeaRay 340DA, V-Drive
    7.4 Horizons - 380 HP
    Hey all,

    So have an interesting problem that developed near the end of the season this year. My Westerbeke 4.5kw Gen is slowly losing coolent somewhere. It does not appear to be leaking out of any hoses/fittings as I don't see any coolant in the bildge, however when I'm running the gen over night I find that the next day the coolant overflow bottle lost about half what was originally there. Since this is on an 2001 340DA, I was figuring it may be the heat exchanger leaking the coolant into the raw water.

    Are my conclusions sound? Could I be losing the coolant elsewhere? I hooked up a coolant pressure test gauge and put (i think as thsi was end of summer) 10 psi on the system and it did slowly lose pressure over a couple of minutes.

    Are there any other areas I should be checking on first as I'm sure a replacement heat exchanger will be costly?

    Thanks!

    Jay
     
  2. Boater420

    Boater420 Well-Known Member

    Mar 11, 2015
    Clearwater, FL
    '97 330 Sundancer
    V-Drives
    Westerbeke 4.5BCG
    Twin Merc 454's
    That would be my first guess, coolant leaking into raw water. I'd pull the heat exchanger and take it to a radiator shop for testing.
     
  3. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    You're looking at a boat buck for a DIY replacement ($900 +/-). If you could find a shop that could repair it you'd likely be hundreds ahead.

    I bet that'll be a treat to replace from a logistics standpoint. I seem to recall that bugger being in a really convenience spot (sarcasm)...
     
  4. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    Part No. Mfr No. Material Westerbeke Sen-Dure OEM Unit Leaves Warehouse* List Price
    Your Price
    Qty.
    Westerbeke Dual Oil Cooler, D29-13-16
    204509 D29-13-16



    Each 1 Week $317.90
    $293.54


    Westerbeke Heat Exchanger 2" X 17" W/ Mounts (Copper/Bronze)
    479408 46578 Copper / Bronze


    Each 1 Week $457.00
    $336.40


    Westerbeke Heat Exchanger, Direct Replacement, 24308CN Copper Nickel
    162032 24308CN Copper Nickel 24308 -- 24308 Each 1 Week $612.00
    $450.50


    Westerbeke Replacement Heat Exchanger
    89755 15799-15 Copper / Bronze 15799-15

    Each 1 Week $441.53
    $432.15


    Westerbeke Replacement Heat Exchanger, 13"
    488759 15799-13 Copper / Bronze 15799-13 na na Each 1 Week $429.27
    $396.37


    Westerbeke Replacement Heat Exchanger, 3" Dia x 16-1/4" l; fit 8.0 BTDA w/ mnts CuNi, 45374 CN
    203144 45374 CN Copper / Nickel


    Each 1 Week $613.00
    $451.24


    Westerbeke Replacement Heat Exchanger, 3" Dia x 16-1/4" long; fit 8.0 BTDA w/ mounts, 45528
    203145 45528



    Each 1 Week $522.00
    $384.25


    Westerbeke Replacement Heat Exchanger, 4-230
    204508 4-230
    4-230

    Each 1 Week $494.84
    $448.46


    Westerbeke Replacement Heat Exchanger, CuNi, 38147CN
    204107 38147CN Copper / Nickel 38147

    Each 1 Week $608.00
    $447.56


    Westerbeke Replacement Heat Exchanger, Gen Set 3" Dia x 16" long w/ mounts CuNi, 36903CN
    89896 36903CN Copper / Nickel 36903

    Each 1 Week $608.00
    $447.56


    Westerbeke Replacement Heat Exchanger, Gen Set 3" Dia x 16" long w/ mounts, 36903
    89889 36903 Copper / Bronze 36903

    Each 1 Week $515.00
    $379.10


    Westerbeke Replacement Heat Exchanger, Gen Set w/ mounts CuNi, 35135CN
    111764 35135CN Copper / Nickel 35135

    Each 1 Week $608.00
    $447.56


    Westerbeke Replacement Heat Exchanger, Gen Set, 24774
    97978 24774

    24774 NA001406 Each 1 Week $515.00
    $379.10


    Westerbeke Replacement Heat Exchanger, Gen Set, 24774CN
    484291 24774CN Copper / Nickel 24774

    Each 1 Week $608.00
    $447.56


    Westerbeke, Heat Exchanger, with Mounts, Copper
    204382 038300



    Each 1 Week $571.00
    $420.32


    Westerbeke, Heat Exchanger, with Mounts, Copper-Nickel
    422348 038300CN Copper / Nickel


    Each 1 Week $506.94
    $468.09


    Westerbeke Replacement Heat Exchanger, 37772CN
    488650 37772CN Copper / Nickel


    Each 1 Week $641.00
    $471.85
     
  5. AllTideUp

    AllTideUp Member

    150
    May 6, 2013
    Northern Virginia
    2001 SeaRay 340DA, V-Drive
    7.4 Horizons - 380 HP
    I was actually just looking them up and they aren't as bad as I thought they were. $3-400 for a replacement. Getting to the bolts that attach them to the gen will be a joy =/ I don't think the Zinc in this gen was replaced in a while as you can't get the new one in without moving the entire exchanger as there isn't enough clearance with the floor of the bilge. Guess I should take a warm day this winter and go down and remove it to see what the damage is.
     
  6. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    Weird. I checked on Westerbeke and saw $847 plus tax, shipping. Hmmm...
     

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