Go Back  Offshoreonly.com > Technical > Do It Yourself, Boating on a Budget
Anyone converted to a closed loop cooling system? >

Anyone converted to a closed loop cooling system?

Notices

Anyone converted to a closed loop cooling system?

Old 11-22-2009, 08:34 PM
  #1  
Registered
VIP Member
Thread Starter
 
Join Date: Sep 2009
Location: Omaha, NE
Posts: 126
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone converted to a closed loop cooling system?

I am putting serious consideration into converting to a closed loop cooling system that uses a heat exchanger instead of pumping raw water thjrough my engines. No need to winterize my engines, and would suspect that coolant would be nicer to my engine internals... Any thoughts on the matter or recommendations would be appreciated.
spunner is offline  
Old 11-23-2009, 01:33 AM
  #2  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,516
Received 1,783 Likes on 884 Posts
Default

You would still need to winterize to a certain extent. You need to run AF through anywhere that water runs through. I just don't see a need for it in this area.
Griff is offline  
Old 11-23-2009, 06:08 AM
  #3  
Platinum Member
Platinum Member
 
bajarick's Avatar
 
Join Date: Jan 2007
Location: canfield, Ohio/cape coral FL
Posts: 622
Received 2 Likes on 2 Posts
Default

Was going to do the same until
I heard the A F could loosen scale
up inside the motor and clog the
exchanger up. Decided not to do it
bajarick is offline  
Old 11-23-2009, 06:57 AM
  #4  
Registered
iTrader: (1)
 
Join Date: Sep 2008
Posts: 1,016
Likes: 0
Received 2 Likes on 2 Posts
Default

I have. Used the kit from monitor marine. It works great! 540 alum heads. The idle is so much better with more heat in the engine.
Steve
smiklos@sunprint is offline  
Old 11-23-2009, 07:33 AM
  #5  
Registered
 
CIG3's Avatar
 
Join Date: Jan 2001
Location: Grand River, Ohio
Posts: 2,278
Likes: 0
Received 10 Likes on 9 Posts
Default

Nice site. www.monitorpro.com
CIG3 is offline  
Old 11-26-2009, 10:34 AM
  #6  
Registered
 
Join Date: May 2007
Posts: 20
Likes: 0
Received 0 Likes on 0 Posts
Default

I converted mine to closed cooling but I am in salt water. Yes AF is slightly acidic and released scale and rust, but since you are in fresh water you probably don't have much. Another benefit is that I could run a higher temp (160deg) thermostat instead of the 143 and the engine will run more efficiently. Maybe in fresh water you can run a 160 with raw water though. Also, the potential for shock cooling (say after raw water pickup clog is cleared) is eliminated as the exchanger acts as a buffer.

The decision for salt water use is easy, for fresh water it's a toss up IMO.
Alan454 is offline  
Old 11-28-2009, 07:23 PM
  #7  
Registered
 
Tinkerer's Avatar
 
Join Date: Jan 2002
Location: ALTO, MI
Posts: 4,612
Received 7 Likes on 6 Posts
Default

I run 160* stats in my fresh water cooled engines.
Tinkerer is offline  
Old 11-29-2009, 12:39 AM
  #8  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,516
Received 1,783 Likes on 884 Posts
Default

Originally Posted by Tinkerer
I run 160* stats in my fresh water cooled engines.
All Mercruiser black EFI/MPI engines run 160* tstats also.
Griff is offline  
Old 11-29-2009, 08:35 AM
  #9  
Registered
 
Join Date: Sep 2009
Location: shoreacres,tx
Posts: 109
Likes: 0
Received 0 Likes on 0 Posts
Default

I have been running a 400 sbc in my boat for years, I added closed cooling because of hot spots in my rear cylinders because of the cooling patterns with siamezed block and I run salt water also. I found that i can run a 15lb pressure cap and 160 degree thermostat, which took care of my circulation issues and also improved my idle with a hostile cam also intake manifold corrosion issues. I do recomend the change upon rebuild wich eliminates the issue of loosening up of scale left over from raw water cooling.
doggiedave is offline  
Old 12-01-2009, 07:37 PM
  #10  
Registered
 
Mr. Cool's Avatar
 
Join Date: Mar 2009
Location: Wixom, MI
Posts: 107
Likes: 0
Received 2 Likes on 1 Post
Default

We design and build closed water cooling systems and would be willing to help with a complete system or simply advice. You can call us at 866-726-COOL. We're an advertiser as well on OSO. But the bottom line is that if you are going to spend a ton rebuilding your engines, it just doesn't make sense not to install the FWC system. All the flexibility the guys talk about above...it's all possible. Gather the information about your engines and call Jim or myself. We'd be happy to help!


Mr. Cool
www.mrcool.us
__________________
Mr Cool for all of your heat exchangers and oil coolers , transmission coolers and more!
Locations in: Florida, Michigan & Washington!
Mr. Cool is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.