Problems replacement coolant - SailNet Community
 
LinkBack Thread Tools
post #1 of 4 Old 03-17-2014 Thread Starter
Member
 
Join Date: Jun 2013
Posts: 51
Thanks: 9
Thanked 0 Times in 0 Posts
Rep Power: 3
 
Problems replacement coolant

I have drained the coolant in the fresh water system our Yanmar 3gm30f.

I supplied new coolant by filing up to the mouth of filler port on the heat exchanger and to the minimum level of the subtank.


After the supply of new coolant I ran the engine in idle for about 30 minutes.

When opening the fillercap on the heat exchanger I noticed that the coolant level had decreased whereas the level in the subtank had increased to between minimum and maximum.

I recall that the level in the subtank was at the minimum mark and the level in the heat exchanger up to the mouth of the filler cap before I drained and supplied the system with new coolant.

So I am wondering if something is wrong now
carlager is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 4 Old 03-17-2014
Senior Smart Aleck
 
jameswilson29's Avatar
 
Join Date: Aug 2009
Location: Richmond, Virginia
Posts: 2,152
Thanks: 34
Thanked 70 Times in 65 Posts
Rep Power: 6
 
Re: Problems replacement coolant

No, just put more coolant in the filler port on the heat exchanger until it is as full as the manual directs, probably up to the exit hose that drains to the overflow tank. Reads as if your system operated properly and the extra coolant, when hot and under greater pressure, flowed into the overflow tank as it should.

Just make sure your overflow tank is at the proper level with respect to the filler port exit hose.

If your coolant level in the heat exchanger is proper, and then your overflow exceeds maximum you might have a problem of too much coolant in the system.

Last edited by jameswilson29; 03-17-2014 at 04:20 PM.
jameswilson29 is offline  
Quote Quick Reply Share with Facebook
post #3 of 4 Old 03-18-2014 Thread Starter
Member
 
Join Date: Jun 2013
Posts: 51
Thanks: 9
Thanked 0 Times in 0 Posts
Rep Power: 3
 
Problems replacement coolant

The problem seems to be that coolant will not flow back from the subtank to the heat exchanger when the engine is cold.

Is it likely that the missing flowback is due to air in the hoses to the water heater ?

And if yes how do I bleed the system for air ?
carlager is offline  
Quote Quick Reply Share with Facebook
post #4 of 4 Old 03-18-2014 Thread Starter
Member
 
Join Date: Jun 2013
Posts: 51
Thanks: 9
Thanked 0 Times in 0 Posts
Rep Power: 3
 
Problems replacement coolant

Problem has solved. When the engine was allowed to cool for a night coolant was sucked from the subtank to the top of the mouth of the heat exchanger.

Thank you for your help
carlager is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
coolant cap reg23 Gear & Maintenance 1 11-26-2013 06:49 PM
Westerbeke 12B Two Coolant Flush/Replacement thron Diesel 3 09-05-2013 09:04 PM
Yanmar coolant replacement Norstar Pacific Seacraft 8 11-11-2009 09:47 AM
Coolant in bilge Boondoggle30 Gear & Maintenance 15 05-08-2009 12:46 AM
Coolant valdon34 Pacific Seacraft 0 07-18-2008 01:45 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome