Yanmar 3GM30F cooling problem

Hi all, My raw water pump failed, and after opening the pump, I found that all six rubber vanes had broken off of the hub. I found five. It is likely that the sixth was carried out the outlet and into the heat exchanger inlet and is lodged against the tube sheet. Has anyone had any experience in removing the end cover plate on the heat exchanger and replacing it without disturbing the tube sheet? Is this possible? Thanks, Travis Porter 1986 CAL 33-2 Vital

I took the end cover off mine when I suspected it was clogged. It wasn't and I put the cover back on without incident. Al 1985 Cal 33 #0026, ShortWave > On Mar 23, 2014, at 9:40 PM, "Travis Porter" <tr… [at] sbcglobal.net> wrote: > > Hi all, > > My raw water pump failed, and after opening the pump, I found that all six rubber vanes had broken off of the hub. I found five. It is likely that the sixth was carried out the outlet and into the heat exchanger inlet and is lodged against the tube sheet. Has anyone had any experience in removing the end cover plate on the heat exchanger and replacing it without disturbing the tube sheet? Is this possible? > > Thanks, > > Travis Porter > > 1986 CAL 33-2 Vital > >

Insure the hose to the exchanger is not plugged with parts of the impeller. I have removed the covers from both ends of the cooling tube and removed the assembly without any trouble. It was also a good opportunity to clean the tubes of any kind of buildup, using vinegar, and reaming with a soft instrument. Putting it back together should not be an issue as long as you remember which end goes in from the front of the engine.I was told that was necessary, and did not question the source! . The gasket set is not too expensive, and the cleaning is listed as part of regular maintenance in the manual. I have 11 thumbs, so if I can do it, you should have no problem. Leeds Mitchell ' 1988 Cal 33 Cythera, Bristol, RI From: Al Waschka <aw… [at] bellsouth.net> To: Cal_Boats <Ca… [at] yahoogroups.com> Sent: Sun, Mar 23, 2014 10:47 pm Subject: Re: [Cal_Boats] Yanmar 3GM30F cooling problem I took the end cover off mine when I suspected it was clogged. It wasn't and I put the cover back on without incident. Al 1985 Cal 33 #0026, ShortWave On Mar 23, 2014, at 9:40 PM, "Travis Porter" <tr… [at] sbcglobal.net> wrote: Hi all, My raw water pump failed, and after opening the pump, I found that all six rubber vanes had broken off of the hub. I found five. It is likely that the sixth was carried out the outlet and into the heat exchanger inlet and is lodged against the tube sheet. Has anyone had any experience in removing the end cover plate on the heat exchanger and replacing it without disturbing the tube sheet? Is this possible? Thanks, Travis Porter 1986 CAL 33-2 Vital

Guys, Thanks for the response. I’ve ordered parts from LaBorde, and will tackle it when they arrive. Travis From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Mitchellri Sent: Monday, March 24, 2014 7:17 AM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] Yanmar 3GM30F cooling problem Insure the hose to the exchanger is not plugged with parts of the impeller. I have removed the covers from both ends of the cooling tube and removed the assembly without any trouble. It was also a good opportunity to clean the tubes of any kind of buildup, using vinegar, and reaming with a soft instrument. Putting it back together should not be an issue as long as you remember which end goes in from the front of the engine.I was told that was necessary, and did not question the source! . The gasket set is not too expensive, and the cleaning is listed as part of regular maintenance in the manual. I have 11 thumbs, so if I can do it, you should have no problem. Leeds Mitchell ' 1988 Cal 33 Cythera, Bristol, RI From: Al Waschka <aw… [at] bellsouth.net> To: Cal_Boats <Ca… [at] yahoogroups.com> Sent: Sun, Mar 23, 2014 10:47 pm Subject: Re: [Cal_Boats] Yanmar 3GM30F cooling problem I took the end cover off mine when I suspected it was clogged. It wasn't and I put the cover back on without incident. Al 1985 Cal 33 #0026, ShortWave On Mar 23, 2014, at 9:40 PM, "Travis Porter" <tr… [at] sbcglobal.net> wrote: Hi all, My raw water pump failed, and after opening the pump, I found that all six rubber vanes had broken off of the hub. I found five. It is likely that the sixth was carried out the outlet and into the heat exchanger inlet and is lodged against the tube sheet. Has anyone had any experience in removing the end cover plate on the heat exchanger and replacing it without disturbing the tube sheet? Is this possible? Thanks, Travis Porter 1986 CAL 33-2 Vital