[C38] heat exchanger

[Larry Malmberg]

Welcome to the list John, I'm sure Tom will pick up on your inquiry and give
you the best advice ever.  We had a leak in our heat exchanger some time
ago, took it out, found the leak and had it repaired fairly easily and
cheaply.  I believe my brother just re soldered the leak spot.  He may have
brazed it, am not sure but it never gave us any further problems.  We did
replace the engine though after the rear main started to leak.  It was
almost the same cost to buy a new engine as pulling the old one and
rebuilding it and putting it back in. 

 

Best regards,

Larry Malmberg-President

Larry Malmberg Investigations and Security, Inc.
505 North Arrowhead Avenue - Suite 510
San Bernardino, CA 92401-1200
909-383-8565, 800-655-4549 Facsimile 909-383-8566
PI 15211, PPO 112446

www.larrypi.com <blocked::blocked::http://www.larrypi.com/> 


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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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