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Old 21-12-2013, 08:14   #1
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White Smoke at >2500+rpm

Any suggestions appreciated! We live in the tropics and one of our VP D30 engines spews a 1m white cloud when we turn the revs up. Just replaced a perfectly good looking impeller and the exhaust water volume seems to match the engine that runs without any smoke...cheers
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Old 21-12-2013, 08:19   #2
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Old 21-12-2013, 08:31   #3
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Re: White smoke at >2500+rpm

Hopefully it's just some water or fouling...

Diesel Smoke tells YOU a Story…
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Old 21-12-2013, 08:36   #4
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Re: White smoke at >2500+rpm

Hopefully just an injector problem.
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Old 21-12-2013, 08:38   #5
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Thanks folks, what's the next step in the injector fix chapter of diesel engines 101?
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Old 21-12-2013, 08:43   #6
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Re: White smoke at >2500+rpm

Take them to a service shop that tests/cleans/repairs injectors and have them serviced or order new ones. Personally I would find a shop that can repair and adjust them. If that doesn't do it then you have to find if there is a water problem which wont be as cheap or easy.
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Old 21-12-2013, 09:25   #7
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Re: White smoke at >2500+rpm

White smoke would lead me to believe its a head/gasket issue. Black smoke=fuel, blue=oil, white=coolant. typically anyways
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Old 21-12-2013, 14:49   #8
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Re: White smoke at >2500+rpm

Olivergm,

Try smelling the white exhaust cloud. If it smells like unburned diesel, it's likely your injectors. If it has a "sweet" smell, you may be looking at a head gasket leak allowing coolant to get into your cylinders.
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Old 21-12-2013, 14:55   #9
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Re: White smoke at >2500+rpm

Smoke or Steam????
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Old 21-12-2013, 15:27   #10
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Re: White smoke at >2500+rpm

And how long has this been doing this? Have you been checking your coolant level? How old is the heat exchanger or last serviced?
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Old 21-12-2013, 16:26   #11
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Thanks for all the suggestions. I'm pretty sure it's smoke and not steam. I'll try smell it today. The boat is new to me but this was not mentioned in a pretty comprehensive survey done 6months ago. There was a kink in the hose from the coolant reservoir which may have been blocking the coolant. This made me think it was steam initially but it looks more like smoke to me...I've replaced the hose but not seen an improvement. Coolant reservoir was hot post 1hr run, which I'm guessing is usual. Since the survey she has done some extended motor sailing on route to me, again with no mention of smoke...
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Old 21-12-2013, 17:23   #12
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Re: White smoke at >2500+rpm

Quote:
Originally Posted by Olivergm View Post
Any suggestions appreciated! We live in the tropics and one of our VP D30 engines spews a 1m white cloud when we turn the revs up. Just replaced a perfectly good looking impeller and the exhaust water volume seems to match the engine that runs without any smoke...cheers


It is hard to help without some particulars. Did it always smoke? What type of boat? engine? Have you changed the prop or added anything?

Some diesels that are older will throw some white smoke when stressed or loaded at high RPM. My Universal runs great at 2600 over that to red line she will blow some smoke.

Simple solution for me.... Run at 2,500. She burns a quart in about 60 hours. No temp issues
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Old 21-12-2013, 19:25   #13
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Old 21-12-2013, 20:02   #14
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Re: White smoke at >2500+rpm

I was on watch motoring in Mexico this last month and the stern light caught what I thought was a lot of white smoke. Turns out that in southern climates and warmer waters will send out more condensation and is ok for that engine. I awakened the Captain for no apparent reason.

I very seldom run an engine at near 2500 rpm. What kind of engine is a VP D30? Does it do the same at lower rpms? Is this a power boat with two engines the same?
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Old 21-12-2013, 20:13   #15
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Volvo Penta 30hp internal engine with leg.950hrs 3yrs old...
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