Here's the tank I used, the same place has the cap and fittings.
https://www.speedwaymotors.com/Speedway-Aluminum-Radiator-Coolant-Overflow-Expansion-Tank-8AN,1840.html
I put an external Indigo thermostat after the manifold outlet and
blocked the bypass flow on the side of the engine so all the water flows
from the pump thru the block. I use a 160deg thermostat, although you
can get 180deg. The only issue I've run into is that there's so much
grit in my engine block even after I blew it all out with compressed air
(40 yrs with raw water cooling does that, as you found out) that I'd get
some under the plate of the thermostat valve itself which then wouldn't
open and the engine would heat up. I put a strainer upstream of it and
that's worked for the last 5 years or so with no issue, runs right at 160.
I did not put a zinc in anywhere in the raw water side, the heat
exchanger is stainless, just has bronze brazing between the plates.
Neil Gallagher
Weatherly, 35-1
Glen Cove, NY
On 11/13/2025 1:15 PM, Della Barba, Joe via CnC-List wrote:
What are you using for an expansion tank? What temps were you running?
Did you add a zinc?
Thanks!
*/Joe Della Barba/*
Coquina
*From:*Neil Gallagher via CnC-List <[email protected]>
*Sent:* Thursday, November 13, 2025 11:49 AM
*To:* Della Barba, Joe via CnC-List <[email protected]>
*Cc:* Neil Gallagher <[email protected]>
*Subject:* [EXTERNAL] Stus-List Re: Long Term Reports on a few things:
Joe,
FWIW I have used this heat exchanger since I put FWC on my A-4.
They're so cheap I consider it a throw-away. First one lasted about
10 years and was still fine but the copper was getting a little
green. I'm on 5 years of the second. Plenty of cooling capacity.
https://www.vevor.com/plate-heat-exchanger-c_10378/heat-exchanger-brazed-plate-heat-exchanger-30-plate-heat-exchanger-for-heating-p_010268730644
Neil Gallagher
Weatherly, 35-1
Glen Cove, NY
On 11/13/2025 10:58 AM, Della Barba, Joe via CnC-List wrote:
1. The PVC hawsepipe fix: When the previous owner back in 1973 or
maybe the factory cut the hole through the deck for the anchor
chain, whomever did it did NOT SEAL IT AT ALL. Believe it or
not the balsa sort of held up, apparently being open to air
let it dry back out mostly. I got some PVC pipe, maybe 3
inches, and cut the deck hole a bit bigger so the pipe fit a
little loosely but not much. I cut the pipe to stick through
the deck below about ½” or maybe a bit less. I sealed around
the bottom with butyl and then poured epoxy around the pipe
from the top to fill in the tiny gap and seal the balsa. This
was a few years ago and has worked perfectly 😊 I was afraid
the epoxy would not stick to the pipe, but it did and the pipe
keeps the chain from eating away at the deck and compromising
the seal.
2. Using liquid rubber to seal my forward hatch: This I would
rate so-so. My hatches are totally original from 73 and tend
to leak around the screw holes and sela between the glass and
the frame. A combination of liquid rubber and some Creeping
Crack Cure makes them watertight, but it does not last. Adding
a touch more is a yearly thing now. It is still a cheap cure
vs. a new hatch, but it is not a one-and-done. I still can’t
complain too much, no 52 year-old Lewmar hatch will even be
intact. If I ever do get new hatches, I will be avoiding the
low-end Lewmars, they seem to leak starting at age 2 or 3 from
all I read online. The higher-end versions seem well worth it.
3. AGM Batteries: No one seems to make lead-acid cells of any
version whatsoever that are as good as the gel batteries I
could get around 1990. My 2 year-old Odyssey thin-plate is
doing OK, but not nearly as good as my gel from back in the
day was at age 7. I am going lithium, the savings on
chiropractor bills alone will be worth it!
4. Fresh Water Cooling – I decided my old engine didn’t need it,
the extra heat and hoses all over did not seem worth it. Joke
was on me, last December the salt water ate through and the
engine was no more. Now I have a new (to me) engine with a
Moyer rebuild and sleeved cylinders I will be adding FWC. The
engine will probably outlive me, but I do need to hunt down a
bigger heat exchanger.
5. Solar: I have had a 50 watt panel for many years. It has
literally paid for itself in gas not used to charge batteries.
For a long time I would be at anchor for 2 weeks straight
while the kids were at sailing camp, so there was no reason to
run the engine except charging. It was not enough to keep up
totally, but I went from daily charging to once every 3 days
or so. I plan to fix up more panels.
*/Joe Della Barba/*
Coquina
C&C 35 MK I
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November is the time of the year when my Internet bills come in. It's also the
time when you can show your appreciation of this list and the C&C Photo Album.
Please help by making a small contribution using PayPal
at:https://www.paypal.com/paypalme/stumurray All contributions are greatly
appreciated.
November is the time of the year when my Internet bills come in. It's also the
time when you can show your appreciation of this list and the C&C Photo Album.
Please help by making a small contribution using PayPal at:
https://www.paypal.com/paypalme/stumurray All contributions are greatly
appreciated.
