Yanmar 3GM30F--Changing Coolant

Hi all, I have a '86 cal 33-2 bought two years ago. It has the "green stuff" as the coolant. I don't know when it was last changed, but I need to do this and have been dreading it. I've read that we need to use the "orange stuff" (with low silicates) in these engines(true?) I've bought it, but have read that it is not compatable with green. So, I need to drain, flush, and refil with the orange. I do have a water heater, and it looks to be above the engine. So, I've heard that it is easy to get air in the system and cause overheating. Has anyone dealt with this and do you have suggestions? Thanks, Travis '86 33-2 "Vital"

I used to have an air-lock problem due to the high water heater in my 31. I installed a small tank inside the cockpit locker higher than the water heater, which solved the problem. The tank has fittings for a hose from the water heater and a hose to the heat exchanger, along with its own "radiator" cap. Google for "overflow tank." If that doesn't turn up something, let me know, as I may still have the paperwork. Harleigh Ewell Cal 31 From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Travis Sent: Wednesday, October 15, 2008 2:20 PM To: Ca… [at] yahoogroups.com Subject: [Cal_Boats] Yanmar 3GM30F--Changing Coolant Hi all, I have a '86 cal 33-2 bought two years ago. It has the "green stuff" as the coolant. I don't know when it was last changed, but I need to do this and have been dreading it. I've read that we need to use the "orange stuff" (with low silicates) in these engines(true?) I've bought it, but have read that it is not compatable with green. So, I need to drain, flush, and refil with the orange. I do have a water heater, and it looks to be above the engine. So, I've heard that it is easy to get air in the system and cause overheating. Has anyone dealt with this and do you have suggestions? Thanks, Travis '86 33-2 "Vital"

Fear not! This is not that hard. My engine has had the green stuff for years and seems to do fine. I replace it every year. On the starboard side of the engine is a drain for the heat exchanger where all the green stuff can be drained, although this still leaves a lot in the engine block. You can flush with serial washes of distilled water which is fine while you are sitting at the dock. When I fill it, I fill as far as it will go, then let it sit for a while so the bubbles can come up, then fill some more. Finally I run the engine for a few minutes and then stop, let it sit, then fill it again. The overflow tank sounds like a great idea, but not sure where I would put it in the engine compartment. Not sure about the orange stuff. I have never used it and this is the first I have ever heard about it. If I am doing something wrong, please, someone let me know. Hope this helps. Darr LaFon _____ From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Harleigh Ewell Sent: Wednesday, October 15, 2008 2:35 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] Yanmar 3GM30F--Changing Coolant I used to have an air-lock problem due to the high water heater in my 31. I installed a small tank inside the cockpit locker higher than the water heater, which solved the problem. The tank has fittings for a hose from the water heater and a hose to the heat exchanger, along with its own "radiator" cap. Google for "overflow tank." If that doesn't turn up something, let me know, as I may still have the paperwork. Harleigh Ewell Cal 31 From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Travis Sent: Wednesday, October 15, 2008 2:20 PM To: Ca… [at] yahoogroups.com Subject: [Cal_Boats] Yanmar 3GM30F--Changing Coolant Hi all, I have a '86 cal 33-2 bought two years ago. It has the "green stuff" as the coolant. I don't know when it was last changed, but I need to do this and have been dreading it. I've read that we need to use the "orange stuff" (with low silicates) in these engines(true?) I've bought it, but have read that it is not compatable with green. So, I need to drain, flush, and refil with the orange. I do have a water heater, and it looks to be above the engine. So, I've heard that it is easy to get air in the system and cause overheating. Has anyone dealt with this and do you have suggestions? Thanks, Travis '86 33-2 "Vital"

My tank is installed in the starboard cockpit locker and bolted as high as possible on the side of the cockpit well. It is mounted so that the cap is exposed when the locker is opened, so the coolant level can be seen and coolant added if necessary.. Harleigh From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of darr lafon Sent: Wednesday, October 15, 2008 3:08 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] Yanmar 3GM30F--Changing Coolant . . . The overflow tank sounds like a great idea, but not sure where I would put it in the engine compartment. . . . _____ From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Harleigh Ewell Sent: Wednesday, October 15, 2008 2:35 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] Yanmar 3GM30F--Changing Coolant I used to have an air-lock problem due to the high water heater in my 31. I installed a small tank inside the cockpit locker higher than the water heater, which solved the problem. The tank has fittings for a hose from the water heater and a hose to the heat exchanger, along with its own "radiator" cap. Google for "overflow tank." If that doesn't turn up something, let me know, as I may still have the paperwork. Harleigh Ewell Cal 31 From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Travis Sent: Wednesday, October 15, 2008 2:20 PM To: Ca… [at] yahoogroups.com Subject: [Cal_Boats] Yanmar 3GM30F--Changing Coolant . . .. I do have a water heater, and it looks to be above the engine. So, I've heard that it is easy to get air in the system and cause overheating. Has anyone dealt with this and do you have suggestions?

Yanmar recommends the orange stuff.... good luck ----- Original Message ----- From: Harleigh Ewell To: Ca… [at] yahoogroups.com Sent: Wednesday, October 15, 2008 3:49 PM Subject: RE: [Cal_Boats] Yanmar 3GM30F--Coolant tank: Was Changing Coolant (Travis and Darr) My tank is installed in the starboard cockpit locker and bolted as high as possible on the side of the cockpit well. It is mounted so that the cap is exposed when the locker is opened, so the coolant level can be seen and coolant added if necessary.. Harleigh -----Original Message----- From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of darr lafon Sent: Wednesday, October 15, 2008 3:08 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] Yanmar 3GM30F--Changing Coolant . . . The overflow tank sounds like a great idea, but not sure where I would put it in the engine compartment. . . . ------------------------------------------------------------------------------ From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Harleigh Ewell Sent: Wednesday, October 15, 2008 2:35 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] Yanmar 3GM30F--Changing Coolant I used to have an air-lock problem due to the high water heater in my 31. I installed a small tank inside the cockpit locker higher than the water heater, which solved the problem. The tank has fittings for a hose from the water heater and a hose to the heat exchanger, along with its own "radiator" cap. Google for "overflow tank." If that doesn't turn up something, let me know, as I may still have the paperwork. Harleigh Ewell Cal 31 -----Original Message----- From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Travis Sent: Wednesday, October 15, 2008 2:20 PM To: Ca… [at] yahoogroups.com Subject: [Cal_Boats] Yanmar 3GM30F--Changing Coolant . . .. I do have a water heater, and it looks to be above the engine. So, I've heard that it is easy to get air in the system and cause overheating. Has anyone dealt with this and do you have suggestions? ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.8.0/1725 - Release Date: 10/14/2008 9:25 PM