[C320-list] FW: RE: Yanmar Coolant

[Karl Mielenhausen _/)]

Here are the answers to questions I posed to Mack Boring about coolant options for our Yanmar's....



Karl Mielenhausen

2000 C320 Hull#690 "Silver Lining"

New Bern, NC

http://members.cox.net/mielen/



From: Tom Watts [mailto: tomw at mackboring.com]

To: kmielen at iwon.com

Date: Wed, 19 Apr 2006 11:05:44 -0400

Subject: RE: Yanmar Coolant



Yanmar accepts the following antifreeze applications in their products<br>present and past models:<br>1. Ethylene glycol-Changed annually regardless of hours of operation.<br>2. Extended Life Antifreeze or Coolant (Meets or exceeds ASTM D3306 &<br>D4985)<br>   Changed every two years or 250 hours whichever comes first.<br> -Yanmar Ultralife YG30 <br> -Dex-Cool Long Lfe Coolant<br> -Havoline Extended Life Antifreeze<br>Benefits of extended life coolants:<br>1. reduces hard scale build up<br>2. better heat transfer<br>3. no phosphate or silicate formation<br>4. long term corrosion protection for aluminum, bronze and cast iron<br>5. improved water pump life <br><br><br>Thomas J. Watts<br>Technical Support<br>Mack Boring & Parts Company<br>908-964-0700 ext. 286<br>tomw at mackboring.com<br><br>-----Original Message-----<br>From: Kathleen Minichini <br>Sent: Wednesday, April 19, 2006 8:46 AM<br>To: Tom Watts<br>Subject: FW: Yanmar Coolant<br><br>Good Morning Tom,<br><br>Here is a web 
inquiry for you.<br><br>Thanks,<br>Kathy<br><br>-----Original Message-----<br>From: Karl Mielenhausen _/) [mailto:kmielen at iwon.com]<br>Sent: Tuesday, April 18, 2006 5:21 PM<br>To: Kathleen Minichini<br>Subject: Yanmar Coolant<br><br><br>I have heard that Yanmar is now recommending DEX-COOL type coolant in<br>their marine diesels. My 2000 Catalina 320 has the 3GM30FC that came<br>with Ethylene Glycol (green) coolant. If we are supposed to change the<br>coolant every season or two anyway, what is the benefit of the extended<br>life (orange) coolant? Does the flush interval increase with DEX-COOL?<br><br>What about using the red coolant (OAT inhibitors also, but with the<br>ethylene glycol base)? How about the YELLOW (hybrid) coolant? <br><br>Are any internal Yanmar parts (gaskets, etc) incompatable with any of<br>these "new" coolants? Did Yanmar redesign anything in the new 3YM30<br>engine to make it more compatable with DEX-COOL?<br><br><br><br>Bottom line is that this has 
been a topic of interest to the C320 owners<br>and we'd like to know what to do and why.<br><br>Many thanks....<br><br><br><br>Karl Mielenhausen<br><br>2000 C320 Hull#690 "Silver Lining"<br><br>New Bern, NC<br><br>http://members.cox.net/mielen/<br><br>_______________________________________________<br><br><br><br>

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