Sounds like you may have solved your own problem. If the one hose leading to the thermostat is cold and the other is hot then you should check that the thermostat is working. You can remove it and test in a pot of hot water. Or, you can even remove it and reassemble the engine (temporarily) without it to see if that solves the problem.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Tue, Aug 25, 2020, 22:55 Mazen Aziz via CnC-List <cnc-list@cnc-list.com> wrote: > Hi everyone, > > Hope everyone is doing well and staying safe. So since I got the > boat(C&c-3 35) 2 months ago, I have been doing all the typical engine > Maintinance. I never touched an engine > <https://www.cruisersforum.com/forums/tags/engine.html> before with > absolutely no experience. Got the boat > <https://www.cruisersforum.com/forums/tags/boat.html> and started to > follow the manual from oil change > <https://www.cruisersforum.com/forums/tags/oil%20change.html>, filters, > impellers etc. However, my engine > <https://www.cruisersforum.com/forums/tags/engine.html> now heats up and > the idiot temp alarm > <https://www.cruisersforum.com/forums/tags/alarm.html> comes off. I have > a yanmar 3gm30 that has been modified to be coolant cooled. > > My engine had unknown green coolant > <https://www.cruisersforum.com/forums/tags/coolant.html>, I went ahead > and flushed it and replaced it with the pink good stuff. While > troubleshooting the overheat, I checked the impellers again(both new), > pumps rotate with no problem or leak and sea water > <https://www.cruisersforum.com/forums/tags/water.html> ofF the exhaust > <https://www.cruisersforum.com/forums/tags/exhaust.html> and no leakage > anywhere. So I think it has to be the coolant circuit. Something weird is > that the hose from the heat exchanger > <https://www.cruisersforum.com/forums/tags/heat%20exchanger.html> to the > pump <https://www.cruisersforum.com/forums/tags/pump.html> until the > thermostat, stays cold. But from the thermostat to the engine block and the > last hose from block to the heat exchanger > <https://www.cruisersforum.com/forums/tags/heat%20exchanger.html> is > really hot. All hoses are replaced and checked for blockage. Is that an air > block? If so, how can I bleed the system? Couldn’t find that anywhere. Also > after the engine cools, I opened all the hoses to check if they have flow > on them, and they all had coolant except these last 2 from the engine block > to the heat exchanger. Is that normal? Should I fill them up manually with > coolant to try to get rid of any air blockage? > > Last but not least, I may have trouble shoot the engine so much, and now I > see steam that comes off or close by the 1st cylinder. Also a lot of blue > smoke from the exhaust > <https://www.cruisersforum.com/forums/tags/exhaust.html>. That never > happened before. Did I mess up big time? > > Thank you again for your time > > Enterprise > C&c-35 > San Francisco > > *MAZEN AZIZ* > https://mazenaziz.wixsite.com/mazenaziz > > > > "I don't think that architecture is only about shelter, is only about a > very simple enclosure. It should be able to excite you, to calm you, to > make you think." Zaha Hadid > > > "It isn't the mountains ahead to climb that wear you out; it's the pebble > in your shoe." Muhammad Ali > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
