Flushing a sea water cooled Diesel - 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 > On Board > 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 11-03-2010
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,818
Thanks: 4
Thanked 17 Times in 17 Posts
Rep Power: 4
casey1999 is on a distinguished road
Flushing a sea water cooled Diesel

I have a Yanmar 3GM. What the is best material to use to try to flush the sea water cooling system? Engine is direct sea water cooled. I will hook up a hose to the cooling water inlet (by pass inlet sea ****). The hose will be connected to a bucket I will keep filled with the flushing solution. Will a mix of 50% vinegar work or is Salt Away good? I have heard acid is good but would prefer not to use.
Reply With Quote Share with Facebook
  #2  
Old 11-03-2010
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,286
Thanks: 10
Thanked 117 Times in 85 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
Quote:
Originally Posted by casey1999 View Post
I have a Yanmar 3GM. What the is best material to use to try to flush the sea water cooling system? Engine is direct sea water cooled. I will hook up a hose to the cooling water inlet (by pass inlet sea ****). The hose will be connected to a bucket I will keep filled with the flushing solution. Will a mix of 50% vinegar work or is Salt Away good? I have heard acid is good but would prefer not to use.
1- Get an acid proof or resistant pump even a $6.00 drill pump works

2- Get some Rydlyme!

3- Remove the t-stat and re-assemble the housing

4- Disconnect the exhaust water injection hose at the injection elbow

5- Add a hose extension to this hose to feed it back into a 5 gal bucket

6- Remove impeller and put cover plate back on.

7- Stick the RW pumps intake hose into the mix of Rydlyme and water in the 5 gal bucket and flip on the circulating pump.

7- CIRCULATE the Rydlyme from the bucket through the engine then back into the bucket per time frame and instructions.

8- By removing the t water injection hose from the exhaust elbow you will not fill your waterlift muffler and engine block as the liquid will be flowing back into the 5 gallon bucket not into your cylinders.

9- Run fresh water through the block mixed with a little baking soda to neutralize it

10- Re-install new impeller & new t-stat and re-connect the water injection hose.

11- Run engine hard for about an hour under load to build back the "good rust" and oxide layer inside the engines passages.

12- You're done.

This is the same procedure except on a FWC engine where I removed the HX and used the inlet/outlet for circulation of the Rydlyme.


__________________
______
-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.



Last edited by Maine Sail; 11-03-2010 at 12:47 PM.
Reply With Quote Share with Facebook
  #3  
Old 11-03-2010
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,818
Thanks: 4
Thanked 17 Times in 17 Posts
Rep Power: 4
casey1999 is on a distinguished road
Wow that engine looks good. I will go with the Ryd Lyme and your method.
Regards, Casey
Reply With Quote Share with Facebook
  #4  
Old 11-03-2010
svHyLyte's Avatar
Old as Dirt!
 
Join Date: Nov 2008
Location: Tampa Bay Area
Posts: 2,636
Thanks: 11
Thanked 99 Times in 94 Posts
Rep Power: 6
svHyLyte is on a distinguished road
Quote:
Originally Posted by casey1999 View Post
Wow that engine looks good. I will go with the Ryd Lyme and your method.
Regards, Casey
Casey,

We use essentially the same methodology as Main Sail. However, the pump I use is an inexpensive Rule 360 GPH submersible bilge pump from West Marine (or Defender). At WM, mine cost $29.00 usually but on sale was $19.00. (I power this with jumpers to the ship's house batteries.)

RydLyme is effective but very costly and you might find that Salt-Away would also be quite effective at somewhat lesser cost. Despite the foregoing, I have also used RydLym and was very satisfied with the results at a 50/50 mix. You can judge the amount of water you need to recirculate through your engine by filling a bucket with a measured amount of fresh water only and discharging the return line into an adjoining empty bucket. Once water begins to issue from the return line, stop and measure the amount of water that has been pulled from your input bucket. You only need enough water to fill the engine and cover the submersible bilge pump (if you use one) or the intake hose-end of an alternate pump such as that used by Main Sail. If you do choose to use RydLyme, use a 50/50 mix. If you choose to use Salt-Away the mix ratio is 2-3 Ounces of Salt-Away per Gallon of Fresh Water. I found that recirculating the mix for two hours was quite enough to clean out our system. (Salt-Away will actually work with salt-water as well as fresh and couple of squirts into your raw-water filter bowl from time to time will help keep your cooling system clear.)

FWIW we also keep squeeze bottles with a thin mix of Salt-Away and water in our heads and ask users to put a squirt of that into the bowl and give a few extra pumps to get it into the wast lines once the bowl has been emptied and flushed. With this the toilets and waste-lines have remained clear, odor and problem free since we began the process and the seals and joker valves seem to last quite a long time although we do service the toilets and pumps anually as a matter of course.
__________________
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
Reply With Quote Share with Facebook
  #5  
Old 11-03-2010
Senior Member
 
Join Date: Jul 2009
Location: South Florida
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
oceanscapt is on a distinguished road
Send a message via Skype™ to oceanscapt
We use Salt Away on the tender and jet ski motors with great results. It's economical, fast, and does a good job of removing the salt.
__________________
Capt. Douglas Abbott
USCG/MCA IV/C.I./M.I. 500-ton Oceans
PADI MSDT

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
  #6  
Old 11-03-2010
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,286
Thanks: 10
Thanked 117 Times in 85 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
Salt Away is great for salt but has limited use for any sort of rust or corrosion blockagaes inside the passages. Rydlyme wil clean out clogs and corrosion leaving you with a clean engine that transfers heat to the water very well.

I cleaned an engine where the #1 cylinder was getting very hot due to a what I hoped was just a blocked passage. 30 minutes of Rydlyme and it ran at the exact same temp as the rest of the engine. It may be expensive but it really works quite well.
__________________
______
-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
  #7  
Old 11-04-2010
JimsCAL's Avatar
Senior Member
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,385
Thanks: 1
Thanked 34 Times in 33 Posts
Rep Power: 8
JimsCAL is on a distinguished road
Quote:
Originally Posted by casey1999 View Post
I have heard acid is good but would prefer not to use.
The active ingredient in any of the commerical products is acid. The main advantage is that they have adjusted the strength to be effective, but won't damage the engine internals. The reason for the baking soda flush at the end is to neutralize any remaining acid. Oxalic acid from the hardware store works well and a $5 box will make up a couple of gallons of solution.
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
Farymann fresh water cooled diesel? scove Boat Review and Purchase Forum 8 07-10-2009 10:29 AM
Flushing a raw water diesel L124C Gear & Maintenance 3 05-14-2009 01:59 AM
raw watter cooled Volvo diesel engine sibley Sailboat Design and Construction 3 03-08-2008 06:26 AM
Raw water cooled engines Neicy Gear & Maintenance 10 05-16-2005 12:14 AM
Raw-Water-Cooled Engine Mark Matthews Gear and Maintenance Articles 0 12-26-2001 07:00 PM


All times are GMT -4. The time now is 11:50 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

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.