Go Back  Offshoreonly.com > Technical > General Q & A
Closed Cooling Question >

Closed Cooling Question

Notices

Closed Cooling Question

Old 02-23-2005, 03:36 PM
  #1  
Registered
Thread Starter
iTrader: (3)
 
Join Date: May 2001
Location: West Michigan
Posts: 1,383
Likes: 0
Received 0 Likes on 0 Posts
Default Closed Cooling Question

When using a closed cooling system like Innovation Marine uses on many of their engines, are the water jackets in the exhaust system part of the closed cooling system or does the raw sea water run through it? Does the raw sea water simply run through the raw water pump through the heat exchanger and then dump overboard?

Thanks
BGIII is offline  
Old 02-23-2005, 03:53 PM
  #2  
Registered
 
Reed Jensen's Avatar
 
Join Date: Dec 2003
Location: Los Angeles California
Posts: 8,305
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

Originally Posted by BGIII
When using a closed cooling system like Innovation Marine uses on many of their engines, are the water jackets in the exhaust system part of the closed cooling system or does the raw sea water run through it? Does the raw sea water simply run through the raw water pump through the heat exchanger and then dump overboard?

Thanks
The raw water goes through the sea strainer... the raw water pump... the oil coolers.... the heat exchanger.. then through the exhaust headers at which point it exits the boat. The only part that is cooled by the heat exchanger is the engine block, and heads..... When the coolant exits the thermostat housing it returns to the heat exchanger and back to the circulating pump.The circulating pump is generally mounted where a water pump is on an automotive application.
Reed Jensen is offline  
Old 02-23-2005, 04:51 PM
  #3  
Gold Member
Gold Member
 
Attack's Avatar
 
Join Date: Jun 2004
Location: Laguna Niguel, CA
Posts: 129
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

I owned the Innovation DPX 600's. I agree with the above statements, and would like to add that you should treat the headers carefully by flushing and draining to prevent water in the cylinders. I caught mine just in time.... I think next time out the motors would have hydraulicked. The headers were four years old and occasionally I did not flush them.
Attack is offline  
Old 02-23-2005, 05:11 PM
  #4  
Registered
 
CPPerformance's Avatar
 
Join Date: Nov 2004
Location: Rohnert Park, CA
Posts: 958
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

There are closed cooling systems available that circulate through the exhaust manifolds. The raw water is discharged through the tailpipe or riser. The system you described would be a "Partial Closed Cooling System".

Here's a couple diagrams of these types of systems to give you an idea of how these work. If you need a quote on a system just give us a call.
Attached Thumbnails Closed Cooling Question-ccsfull.jpg   Closed Cooling Question-ccshalf.jpg  

Last edited by CPPerformance; 02-23-2005 at 05:15 PM.
CPPerformance is offline  
Old 02-23-2005, 06:49 PM
  #5  
Platinum Member
Platinum Member
 
mcollinstn's Avatar
 
Join Date: Sep 2001
Location: tn
Posts: 5,555
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

gotta just about double the size of the heat exchanger if you close in the exhausts...
mcollinstn is offline  
Old 02-23-2005, 06:55 PM
  #6  
Registered
 
Poorsche's Avatar
 
Join Date: Nov 2003
Location: Melbourne, FL
Posts: 1,243
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

I've got MarinePower EFI Big Blocks and they are standard with the full closed colling system. THe raw water (sea water) from the heat exchanger is dumped to the exhaust at the riser (elbow). THere is a stainless steel gasket that seals off the manifold/coolant from the riser/elbo area.

In my situation we had to use 6" spacer blocks and we set system up so the spacers are also cooled by coolant from the heat exchanger instead of raw water.
Poorsche is offline  
Old 02-24-2005, 06:46 AM
  #7  
Registered
 
Join Date: Jul 2004
Location: SENECA LAKE
Posts: 171
Likes: 0
Received 0 Likes on 0 Posts
Talking Re: Closed Cooling Question

I installed a FULL system on my engine and the engine temp. dropped 10 to 15 deg. and the heat exchanger is normal size you just need a system designed to handle it all.
Badtoon is offline  
Old 02-24-2005, 07:17 AM
  #8  
Platinum Member
Platinum Member
 
skaterboy's Avatar
 
Join Date: Sep 2004
Location: Colts Neck, NJ
Posts: 383
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

Suggestion: add header drains so you do not have to flush headers. All salt water will drain from the bottom of the headers when the engine is turned off.
skaterboy is offline  
Old 02-25-2005, 02:30 PM
  #9  
Platinum Member
Platinum Member
 
Viper31's Avatar
 
Join Date: Sep 2002
Location: Millersville,MD
Posts: 381
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

Skaterboy,
Got any pics of a setup like that? Where do they drain and how is it automatic?
Viper31 is offline  
Old 02-25-2005, 02:39 PM
  #10  
Platinum Member
Platinum Member
 
skaterboy's Avatar
 
Join Date: Sep 2004
Location: Colts Neck, NJ
Posts: 383
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Closed Cooling Question

Viper 31,

Sorry "no pictures" at this time the boat is all covered, but if you are familiar with the 525EFI engine there is a common rail just below the header that runs the whole length. By simply removing the plug from the lowest end of the common rail and connecting a hose to it. Then install a exit stainless steel fitting on the side of the boat (above water level but below the headers) and connect the hose. The excess flow of water will flow while the engine is running and then when you shut the engine down , all the water left in the headers will automatically just drain out.
skaterboy is offline  

Quick Reply: Closed Cooling Question


OSO Sponsor
OSO Advertiser
OSO Advertiser

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

OSO Advertiser