Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-05-2014, 07:17   #1
Registered User
 
bouncingyellow's Avatar

Join Date: Mar 2011
Location: Brisbane, australia
Boat: Jarkan 10.5
Posts: 80
Yanmar 3ym corrosion

Hi I need help , my 3ym has suffered servere corrosion on the aliminium block housing the centrifugal pump. Globs of yellow stuff also found inside choking the plumbing up, what had cause this? , I will appreciate any input.
__________________

__________________
bouncingyellow is offline   Reply With Quote
Old 06-05-2014, 07:25   #2
Registered User
 
stevec195's Avatar

Join Date: Oct 2011
Location: Fairhope, AL
Boat: Allied Seawind II #103
Posts: 149
Send a message via Skype™ to stevec195
Re: Yanmar 3ym corrosion

Is there no hint of a coolant leak? What plumbing in particular is exhibiting the yellow crud?
__________________

__________________
stevec195 is offline   Reply With Quote
Old 06-05-2014, 07:35   #3
Registered User
 
bouncingyellow's Avatar

Join Date: Mar 2011
Location: Brisbane, australia
Boat: Jarkan 10.5
Posts: 80
Re: Yanmar 3ym corrosion

There was a slight coolant leak visible from outside around the pump on inspection, then prising the centrifugal pump away from the block in noticed the male end of the housing severely corroded, the yellow crystalline gunk was mostly around the thermostat and had blocked the hot water tank outlet.
__________________
bouncingyellow is offline   Reply With Quote
Old 06-05-2014, 07:38   #4
Registered User
 
stevec195's Avatar

Join Date: Oct 2011
Location: Fairhope, AL
Boat: Allied Seawind II #103
Posts: 149
Send a message via Skype™ to stevec195
Re: Yanmar 3ym corrosion

Uhmm, well it's difficult to say without tasting or seeing. But do you suppose your coolant was contaminated with sea water in addition to the leak at the pump?
__________________
stevec195 is offline   Reply With Quote
Old 06-05-2014, 07:43   #5
Registered User
 
bouncingyellow's Avatar

Join Date: Mar 2011
Location: Brisbane, australia
Boat: Jarkan 10.5
Posts: 80
Re: Yanmar 3ym corrosion

I gave it a little taste and no sign of salt ???? Think I am going to pull of the heat exchanger and have a look at that,, . If my anode has fallen off my shaft could that be the culprit ? .
__________________
bouncingyellow is offline   Reply With Quote
Old 06-05-2014, 07:47   #6
Registered User
 
stevec195's Avatar

Join Date: Oct 2011
Location: Fairhope, AL
Boat: Allied Seawind II #103
Posts: 149
Send a message via Skype™ to stevec195
Re: Yanmar 3ym corrosion

Shaft anode unlikely culprit. Check pencil zincs in water heater and engine. Ensure engine has good ground would be a good start.
__________________
stevec195 is offline   Reply With Quote
Old 06-05-2014, 07:53   #7
Registered User
 
bouncingyellow's Avatar

Join Date: Mar 2011
Location: Brisbane, australia
Boat: Jarkan 10.5
Posts: 80
Re: Yanmar 3ym corrosion

Okay thanks Steve I will check those. Thanks again
__________________
bouncingyellow is offline   Reply With Quote
Old 06-05-2014, 11:04   #8
Registered User
 
stevec195's Avatar

Join Date: Oct 2011
Location: Fairhope, AL
Boat: Allied Seawind II #103
Posts: 149
Send a message via Skype™ to stevec195
Re: Yanmar 3ym corrosion

Also, please no tasting of fluids from your engine-that was meant to be tongue planted in cheek.
__________________
stevec195 is offline   Reply With Quote
Old 06-05-2014, 11:40   #9
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,359
Re: Yanmar 3ym corrosion

Could be inappropriate coolant. Some coolants came out and had additives that became lumps of gunk. Others attacked aluminum. maybe that's really old troublesome coolant?
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 06-05-2014, 13:17   #10
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,045
Re: Yanmar 3ym corrosion

Quote:
Originally Posted by Cheechako View Post
Could be inappropriate coolant. Some coolants came out and had additives that became lumps of gunk. Others attacked aluminum. maybe that's really old troublesome coolant?
Dexcool as a good example, although it's orange. I thought the same
__________________
a64pilot is offline   Reply With Quote
Old 28-08-2014, 06:26   #11
Registered User
 
bouncingyellow's Avatar

Join Date: Mar 2011
Location: Brisbane, australia
Boat: Jarkan 10.5
Posts: 80
Re: Yanmar 3ym corrosion

Cheekato , I agree. I found out that the engine installers did not use the right coolant, the coolant they used only had a half life compared to the yanmar specs thus turning bad and becoming very corrosive on the aluminium parts. Some other Aluminium parts around the heat exchanger have suffered corrosion as well , especially the male ends where the rubber hoses attach, anybody know of a 3ym for wrecking lead them my way.


Sent from my iPhone using Cruisers Sailing Forum
__________________

__________________
bouncingyellow is offline   Reply With Quote
Reply

Tags
corrosion, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 4JH3E exhaust corrosion. nonam Engines and Propulsion Systems 15 26-11-2017 19:14
Yanmar Exhaust Manifold / Heat Exchanger Corrosion iluvteak Engines and Propulsion Systems 48 22-10-2012 10:09
Yanmar Exhaust Manifold Corrosion Jerry45 Engines and Propulsion Systems 14 30-10-2011 18:29



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:43.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.