Leaking injector - Yanmar 3GM30

Chris & Lenore

Chris & Lenore

.
Apr 24, 2006
868
Aloha 32 Toronto, Lake Ontario
Smelling diesel fuel for about half an hour after the engine is shut down. Finally tracked it to one of the injectors - a drip was slowly forming on the inlet fitting and dropping onto the side of the hot engine every few minutes. The connection was tight and I tightened it a bit more but it's still seeping/dripping.
Can't tightened it any more - what should in do next? This is my first diesel so I only assume the connection is a flare type? From the discolourizarion under the leak it looks to have been doing this for some time. The injectors were removed and serviced a couple years ago - probably leaking since then.

Thanks,

Chris


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woodster

woodster

.
Sep 15, 2009
6,243
S2 9.2a Fairhope Al
holdech said:
Smelling diesel fuel for about half an hour after the engine is shut down. Finally tracked it to one of the injectors - a drip was slowly forming on the inlet fitting and dropping onto the side of the hot engine every few minutes. The connection was tight and I tightened it a bit more but it's still seeping/dripping.
Can't tightened it any more - what should in do next? This is my first diesel so I only assume the connection is a flare type? From the discolourizarion under the leak it looks to have been doing this for some time. The injectors were removed and serviced a couple years ago - probably leaking since then.

Thanks,

Chris


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get some new crush washers ( the copper washers) and replace them ...they get harden over time from reusing them and see if that stops your problem
 
kloudie1

kloudie1

.
Nov 6, 2006
10,093
Hunter 34 Mandeville Louisiana
From upper fitting (outlet) or lower fitting (inlet)? Stain seems to come from top or outlet fitting.. Woody is right on .. new crush washers ..
 
Chris & Lenore

Chris & Lenore

.
Apr 24, 2006
868
Aloha 32 Toronto, Lake Ontario
The drops were coming off the inlet but it could have run down from the overflow. I'll replace the crush washers on both - thanks for the advice. Now to find a Yanmar dealer in the Toronto area. The washers are probably generic items but I don't know the spec.

Chris
 
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