Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Cooling System

Reply
 
Thread Tools Display Modes
  #1   IP: 73.17.194.27
Old 05-22-2020, 06:16 PM
eSailor eSailor is offline
Member
 
Join Date: Mar 2020
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
A coolant puzzle

Hello, I hope you all are able to get your boats launched this year and isolate on a cool breeze. Today was the first warm day in Maine, and the sailing was fine. I have a coolant mystery you all might be able to help with.

My beauty is a 1979 Pearson 28, with its companion, a trusty A4.
It equipped with a SenDure (3T122P5) Heat exchanger sending through a standard exhaust /sea water ejector (what are those called anyway?).
Sea water inlet has a filter and it was clear.

On starting the engine and running for 20 minutes, for the first time this season at anchor, I noticed that the exhaust had vapor in it for longer than usual and the the flow out the exhaust "seemed" low. Later after running under load, the engine overheated to 180 degF. The inlet cock is open, the hose to the 2 year old Moyer pump looks good. Engine coolant, glycol mix was good. Brand new pump there. So something is not right.

I guessing a heat exchanger obstruction, maybe old zinc crud?.
Any one else have any ideas or similar experiences?

Cheers,
es,
Dea Latis
Portland, Maine
Reply With Quote
  #2   IP: 216.145.121.132
Old 05-23-2020, 10:43 AM
roadnsky's Avatar
roadnsky roadnsky is offline
Afourian MVP
 
Join Date: Dec 2008
Location: Lake Mead, NV
Posts: 2,936
Thanks: 20
Thanked 267 Times in 188 Posts
First, WELCOME to the forum!

Vapor in the exhaust could be normal depending on surrounding air and water temps.
A temp of 180° is actually a normal range for fresh water cooled.
How confident are you in your temp gauge?
Do you have access to a temp gun?

Also the "sea water ejector" is called a Water Lift (see pic)

The rest of the crew will be along soon with other ideas and suggestions...
Attached Images
  
__________________
-Jerry

'Lone Ranger'

1978 RANGER 30
Reply With Quote
  #3   IP: 216.145.121.132
Old 05-23-2020, 10:58 AM
roadnsky's Avatar
roadnsky roadnsky is offline
Afourian MVP
 
Join Date: Dec 2008
Location: Lake Mead, NV
Posts: 2,936
Thanks: 20
Thanked 267 Times in 188 Posts
I did a quick search and here are a couple of threads you may want to read about your cooling system/HX

http://www.moyermarineforum.com/foru...ad.php?t=11105
http://www.moyermarineforum.com/foru...ad.php?t=11073
__________________
-Jerry

'Lone Ranger'

1978 RANGER 30
Reply With Quote
  #4   IP: 32.211.28.40
Old 05-23-2020, 03:33 PM
Al Schober's Avatar
Al Schober Al Schober is offline
Afourian MVP
 
Join Date: Jul 2009
Location: Uncasville, CT
Posts: 1,606
Thanks: 9
Thanked 259 Times in 201 Posts
I don't think you should be running that hot, particularly in Maine, even with a heat exchanger. I'd be suspicious of the heat exchanger - tubes probably need cleaning. I had a HX on an Onan gen set where I actually had to use a long drill to open up the tubes!
Reply With Quote
The Following User Says Thank You to Al Schober For This Useful Post:
Administrator (05-26-2020)
  #5   IP: 73.17.194.27
Old 05-26-2020, 09:26 AM
eSailor eSailor is offline
Member
 
Join Date: Mar 2020
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Well thank you all for your advice. I took the plunge and removed the heat exchanger and found that the sea water inlet port ( an elbow and a barb fitting) was very crudded up with something semi had that needed to be scraped out. Now running under load yields around 130 def F. Much better.
Reply With Quote
Reply

Tags
coolant

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2 coolant pumps update joe_db Cooling System 6 07-28-2016 10:36 AM
Coolant Dispensation hanleyclifford Cooling System 2 05-26-2013 10:25 AM
Using /or mixing yellow, green antifreeze ArtJ Cooling System 8 06-07-2012 05:27 PM
FW Cooling - Coolant Temp Al Schober Cooling System 9 07-02-2010 01:15 AM
Adding coolant? Overspendin' Cooling System 2 04-07-2007 03:05 AM


All times are GMT -4. The time now is 06:59 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2020 Moyer Marine Inc.

All Rights Reserved