Re: Engine overheating - Amel54

Mark Erdos

David, I am not that familiar with the D3 but I am certain you have a blockage in your raw-water cooling system. Start at the sea chest and work your way along the entire raw-water cooling system ending at the elbow. Remove and clean any heat exchangers (transmission, engine cooling, and after cooler). Check all the hoses to ensure they are clear of debris and ensure the raw-water pump is clean inside. This will solve your issue. Somewhere in the system you will have an “ah ha” moment. It is best to do the entire system since if you have a blockage somewhere, the chances are you’ll have more downstream. Don’t stop at the “ah ha” moment.


This is also a good time to replace the seals/o-rings on the heat exchangers as well as any worn hoses.  


Hope this helps.



With best regards,





Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia


From: [] On Behalf Of David Crisp
Sent: Sunday, July 25, 2021 8:59 AM
Subject: [AmelYachtOwners] Engine overheating - Amel54


Hi All,

I've a problem with my engine D3-110i-C engine running hot (it has 1350hrs on the clock)  I'm having to keep the rev's down at 1100RPM of less otherwise the engine temp steadily rises, so that once it gets to 95degC I back of  the revs.

Apart from the temperature gauge, if I let it run hot some steam can be seen in the exhaust.

Another thing I've noticed is some gurlgling noise coming from the cockpit drain - I'm suspicious this is coming from the anti-syphon bleed hose from the exhaust anti-syphon loop.

I've check the sea water intake, the sea-chest strainer, changed the impeller (it was okay), I've bled air out of the top of the sea chest, I've taken the hoses off the exhaust elbow and that appears clear.

Any suggestions?

David Crisp
SV Wilna Grace
Amel 54 #58

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