[C38] heat exchanger

[ssorton at sbcglobal.net]

Jon,  Congrats on your new boat!  If you have a fresh water heater (6 gal)
and it is heated by engine FW/coolant, be careful as the loss of coolant
could be going into your sink and what you eat/drink.
Cheers, Steve O
  -----Original Message-----
  From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org]On Behalf Of Jonathan Whitney
  Sent: Friday, March 05, 2010 12:40 PM
  To: listserve at catalina38.org
  Subject: [C38] heat exchanger


  Hi,
  I am a proud new owner of a '79 Cat 38 "Kuu Haku".  The engine is a
Universal 5424.  Recently had some overheating issues when sailing back from
Maui to Oahu.  Coolant was leaking somewhere, temp gauge reading over 200 F.
Replaced scaled seawater lines, removed the heat exchanger (3" replacement,
I'm guessing, as I think the 5424 originally came with a 2" exchanger).  It
was visibly clogged and anode totally gone.  So I took it to a radiator shop
to get boiled.  They called and said there were a bunch of leaks and needs
to be replaced.  My question is:  Is it possible to replace just the core,
or should I just get a replacement exchanger?  Also, has anyone replaced a
similar unit for less than the ~$400 at Torrensen.  Are there any
replacement brands to stay away from, or others people have had good luck
with?

  Also, as I have noticed a slow leak in the coolant, it seems safe to say
that FW/antifreeze is leaking into raw water, but should I assume seawater
has contaminated the FW side.  I have drained and flushed all the FW
coolant, but if there is a chance seawater has gotten in the lines should I
do something else to treat the FW side to ensure all seawater is flushed
out.

  Any information would be really appreciated.

  Jon Whitney
  1979 Cat 38 "Kuu Haku"
  #54
  Honolulu, Hawaii
  =
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