I assume you checked your seacock and strainer for blockage? I usually start troubleshooting at the easy stuff, like is there a fish in my water intake? The answer is yes, twice. The second time it happened, it was the first thing I checked. The first time it happened, it was about the 84th.
On 23 May 2013 18:24, Greg Sutherland <bluenosesail...@hotmail.com> wrote: > Hey Don, I had similar issues with my raw water SB8 on a Mirage 26 and it > ended up being the cooling passages in the head and block. I tore it down > and cleaned them out. Was a long process but manageable. Not sure how > complicated it would be on a 3 gm. Very satisfying when I was done and sat > back, beer in hand, and a smile on. Not sure if that's your issue but it > may be a good place to start. > Good luck! > > Greg > Siesta > '87 33-2 > > Sent wirelessly from my BlackBerry > > -----Original Message----- > From: Don Jonsson <dbjons...@shaw.ca> > Date: Fri, 24 May 2013 01:00:17 > To: <cnc-list@cnc-list.com> > Subject: Stus-List Overheating 3GMD - the plot thickens > > > > Hi > > I had previously sent out a message about an overheating diesel. The > culprit, so I thought, was the knuckle going into the mixing elbow, because > generally when I cleaned it, it worked again. For a while. > > So I finally took of the mixing elbow and gave everything a proper > cleaning. I checked the water pump. I checked all hoses by blowing > through them and the engine. > > I put it all back together and it all worked and water pumped like it is > supposed to, except the water pump leaked a bit - needed a new gasket, but > I knew that and just wanted to see if it would work. Got a new gasket and > put it on. Started up and no water. > > I took out the thermostat and checked to see it worked - slightly corroded > but it worked, i.e. opened in hot water. Put everything back together and > started it up and a bit of water but too much steam. Took the thermostat > out and put it in more carefully. Tried again, water running, no steam > everything is perfect. Ran it for a while just to be sure. > > Turned it off. Waited a while (an hour) and started it up again. No > water. > > So the problem is not the mixing elbow (and likely never was as it wasn't > that bad). Not the pump as it looks fine. Not the thermostat - I don't > think although I will replace it. > > The problem is sometimes the engine pumps water and sometimes not. And > I'm stumped. > > This is a raw water cooled engine which makes things different. Has > anyone had a similar problem and ideas for a solution. > > Also, it seems hard to get part numbers for a 3GMD and the local mechanic > had to go find an old book. Is there any place online to find part numbers > for that engine? > > Thanks to anyone that can help. > Don > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > -- Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC
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