Westerbeke 8kw Genny

[The crime scene]

I have a 8kw Westerbeke Genny (diesel) issue that I hope someone can give me advice. A couple weekends ago the genny ran fine all day (four or five hours) on Saturday, but on Sunday after firing it up and running for 15 minutes or so is started pouring out white/bluish smoke from the exhaust. I shut it down and restarted several hours later. It did the same thing so I shut is down. I checked the oil that night and it overflowed from the dipstick tube. The marina mechanic said it was water in the oil. He changed the head gasket and checked the head for warping....which checked out okay. He fired it up and the same thing happened...after warming up is starts spewing smoke. He is now saying it may be an internal crack in either the head or block. Could it be something else? I am not a diesel guy and don't know. As of right now, I am leaning on ordering a new head, but that is a gamble. The local diesel shop says they cant pressure test a three cylinder head since they do not have the equipment for diesels that small. Westerbeke stop producing the block a few years ago, but you can order a head for it.

Some history on the genny. A year ago the water pump bearings failed and the genny got hot. The alarm went off and I immediately shut it down. The water pump and impeller were replaced and it ran fine for over a year before this issue. Could this cause the problem a year later? I need help......

 

[Jus the two of us]

We have the same genny on our boat 2400 hrs. Sure sounds like a cracked head or block. Did the mechanic say it was water or antifreeze, It has a closed system so it should be antifreeze if the block or head is cracked. I'm sure Frank will respond, He is the man on these Older deisel boats. Good luck and I hope its something simple but it don't sound good.

 

[doozie]

Did you check the exhaust elbow, if water in the oil that would be the most likely location for the leak. Raw water doesn’t circulate threw the engine