Where to put engine coolant expansion tank - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 13 Old 11-02-2008
old guy :)
 
rikhall's Avatar
 
Join Date: Feb 2008
Location: Fredericton, NB, Canada
Posts: 1,060
Thanks: 13
Thanked 14 Times in 12 Posts
Rep Power: 8
 
I am neither a certified mechanic nor the son of one. I did install my Yanmar 2GM20F. I also enjoy searching the web. Here are three pictures, for what they are worth:

From the web - http://www.alberg30.org/maintenance/...nmarphoto5.jpg

Here are two from my engine - I think mine were a bit high:

http://rikhall.com/Engine%20coolant%20tank1.jpg

http://rikhall.com/engine%20coolant%20tank%202.jpg

Irwin Citation 34
Mystery
rikhall is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 13 Old 11-02-2008 Thread Starter
Senior Member
 
Join Date: Feb 2008
Posts: 164
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Thanks Rik & everyone else for the answers.

Rik, I'd not seen that Alberg engine photo before. That looks like a great setup, but my Vitus takes up too much room. I did notice that the middle of the tank is about the same level as where the hose comes out of the heat exchanger.

I'm heading down to the boat now to take another look. I may end up relocating it in a cockpit locker

Preserved Killick


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Seagrass
Boothbay Harbor, ME
Alberg 30:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
preservedkillick is offline  
Quote Quick Reply Share with Facebook
post #13 of 13 Old 11-03-2008
Senior Member
 
Omatako's Avatar
 
Join Date: Sep 2003
Location: Auckland New Zealand
Posts: 2,536
Thanks: 1
Thanked 32 Times in 29 Posts
Rep Power: 12
 
Just to answer your question about the pressure cap on the heat exchanger - the pressure cap is intended to raise the pressure in the system and in so doing raise the boiling point of the coolant. That way, if you do get a slight overheat the coolant won't boil at 100 degrees C and it won't blow out of the system.

In the system on your boat, the pressure cap will allow normal expansion to go back to the expansion tank when the pressure in the system exceeds the value of the cap and the expansion tank will replace the coolant thru a return valve in the pressure cap when the engine cools. It is thus better for the tank to be at least at or above the level of the pressure cap.

Note also that if the pressure cap is removed while the engine is hot (for topping up purposes) the pressure in the system is relieved and if there is a tendency to overheat, it will be exacerbated by the cap having been removed because the hot engine will not be able to build the pressure back (no expansion). That is really the reason why it is bad practise to remove caps from hot engines and not only because you'll get scalded (which could also happen )


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

__________________

"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."

Arthur C. Clarke
Omatako is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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
Replacing my fuel tank this Spring, and need your sage advice. ChicagoNewport27 Gear & Maintenance 12 06-04-2008 07:39 PM
Gravity Running Tank for Engine capecodphyllis Gear & Maintenance 11 01-18-2007 10:29 AM
Atomic 4 replacement mr.fixit Gear & Maintenance 4 06-16-2005 04:48 PM
removing orig water tank zeilfanaat Gear & Maintenance 6 04-12-2004 06:26 AM
Diesel Maintenance Mark Matthews Gear and Maintenance Articles 0 06-10-2002 08:00 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