Universal M-18 Heat Exchanger - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > Gear & Maintenance > Engines > Diesel
 Not a Member? 

Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


Reply
 
LinkBack Thread Tools
  #1  
Old 11-17-2012
Senior Member
 
Join Date: Aug 2011
Posts: 110
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3
engineer_sailor is on a distinguished road
Universal M-18 Heat Exchanger

In trying to establish a baseline for the maintenance of the Universal M-18 on my Catalina 27, I am planning on removing and working on the heat exchanger. I've already winterized the engine and I am on the blocks. Is there any issues with putting an empty (i.e. not filled with antifreeze) heat exchanger back on?
Reply With Quote Share with Facebook
  #2  
Old 11-17-2012
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,130
Thanks: 8
Thanked 87 Times in 61 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Universal M-18 Heat Exchanger

Quote:
Originally Posted by engineer_sailor View Post
In trying to establish a baseline for the maintenance of the Universal M-18 on my Catalina 27, I am planning on removing and working on the heat exchanger. I've already winterized the engine and I am on the blocks. Is there any issues with putting an empty (i.e. not filled with antifreeze) heat exchanger back on?
Can't freeze with nothing in it...
__________________
______
-Maine Sail / CS-36T


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




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #3  
Old 11-17-2012
BarryL's Avatar
Senior Member
 
Join Date: Aug 2003
Location: Long Island, NY
Posts: 1,538
Thanks: 3
Thanked 17 Times in 16 Posts
Rep Power: 11
BarryL is on a distinguished road
Re: Universal M-18 Heat Exchanger

Hey,

Just make sure you remember to check / add / burp the coolant system in spring. Don't be surprised if it's difficult to get the air out. Whenever I mess with the fresh water cooling system it takes me a few cycles of bleeding / adding coolant to get all the air out.

Barry
__________________
Barry Lenoble
Day To Remember, 1986 O'day 35 For Sale
Deep Blue C, 2002 C&C 110 For Sail
Mt. Sinai, NY

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 11-19-2012
Stu Jackson's Avatar
Senior Member
 
Join Date: Jul 2001
Posts: 717
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 13
Stu Jackson is on a distinguished road
Re: Universal M-18 Heat Exchanger

Barry's right, here's how to do it:

Engine Overheating 101 - How to Burp Your Engine (Reply #6) Engine overheating problem (with Instructions "How To Burp!")
__________________
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
Reply With Quote Share with Facebook
  #5  
Old 12-06-2012
Senior Member
 
Join Date: Aug 2011
Posts: 110
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3
engineer_sailor is on a distinguished road
Re: Universal M-18 Heat Exchanger

Thanks for the burping advice.

So I finally got around to pulling the heat exchanger. Overall, I would say it is pretty good shape. I found a local radiator shop and I am going to have it pressure tested and cleaned. I am also going to replace the gasket and add a lock washer.

Upon inspection, it appeared that the zinc hole was plugged and the rumored brass plug was missing. I assumed that an old zinc was lodged in the hole. I used an awl to scratch the metal and it appears to be copper! The part is a Sen-Dure 2737 (also 298633). The threads where the brass plug portion of the zinc appear to be missing or in rough shape. Could the use of a zinc have been optional where the installer/user would have to drill the hole?

If this is the case I am guessing I can ignore the zinc on this heat exchanger and reinstall assuming a clean bill of health from the pressure testing/cleaning? Thoughts? Photos below:



Reply With Quote Share with Facebook
  #6  
Old 12-06-2012
CalebD's Avatar
Tartan 27' owner
 
Join Date: Jan 2008
Location: NYC
Posts: 4,437
Thanks: 4
Thanked 74 Times in 67 Posts
Rep Power: 7
CalebD will become famous soon enough
Re: Universal M-18 Heat Exchanger

No photos.

I'm pretty sure that your HX SHOULD HAVE a zinc bolt.
__________________
"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen

Everybody has one:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #7  
Old 12-07-2012
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 1,948
Thanks: 0
Thanked 22 Times in 22 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Universal M-18 Heat Exchanger

If you look at the pics in this thread, what do you have where it says "zinc" in the pic?

Universal M-18 Heat exchanger

Your description isn't very clear but it sounds like the hole has been plugged with a copper plug. Why can't you remove it and install the proper zinc/brass part?

A picture would say a thousand words in this case.
__________________
1984 Bristol 31.1
Alameda, California, USA

Last edited by MarkSF; 12-07-2012 at 12:18 AM.
Reply With Quote Share with Facebook
  #8  
Old 12-07-2012
BarryL's Avatar
Senior Member
 
Join Date: Aug 2003
Location: Long Island, NY
Posts: 1,538
Thanks: 3
Thanked 17 Times in 16 Posts
Rep Power: 11
BarryL is on a distinguished road
Re: Universal M-18 Heat Exchanger

Hey,

It's not obvious, but the zinc gets threaded into the plug. The plug is steel, the same material as the heat exchange. The inside of the plug has female threads and the zinc threads into the plug and then the plug gets threaded into the heat exchanger.

Barry
__________________
Barry Lenoble
Day To Remember, 1986 O'day 35 For Sale
Deep Blue C, 2002 C&C 110 For Sail
Mt. Sinai, NY

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #9  
Old 12-07-2012
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 1,948
Thanks: 0
Thanked 22 Times in 22 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Universal M-18 Heat Exchanger

The ones I bought from the chandlers recently have a zinc part threaded into a brass plug. Definitely not steel.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Share with Facebook
  #10  
Old 12-07-2012
Senior Member
 
Join Date: Aug 2011
Posts: 110
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3
engineer_sailor is on a distinguished road
Re: Universal M-18 Heat Exchanger

Here is another attempt at photos:

https://picasaweb.google.com/lh/phot...eat=directlink

https://picasaweb.google.com/lh/phot...eat=directlink

https://picasaweb.google.com/lh/phot...eat=directlink
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil in Heat Exchanger sailak Gear & Maintenance 38 08-07-2010 08:28 PM
Universal M-18 Heat exchanger jlenox Gear & Maintenance 9 05-02-2009 04:55 PM
Heat Exchanger help DBboat Gear & Maintenance 14 05-20-2008 04:57 PM
Universal M35 Heat Exchanger Replacement SVGratitude Gear & Maintenance 4 12-04-2007 04:49 PM
heat exchanger Jovietal Gear & Maintenance 4 04-03-2007 03:59 PM


All times are GMT -4. The time now is 06:42 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012