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Old 14-09-2015, 05:46   #1
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Bukh DV20 running temp

Can someone tell me what is the correct running temp for a Bukh DV20.
I do have a temp guage and will cross reference with the answer I get today.
The water coming out the outlet is hot but not to hot to touch if that makes sense. I don't have an overheating problem as such. I'm just interested in knowing what a good comfortable temp is to run. I do have a lot of steam coming out with the water but have been told that is normal for the BukhDV20. Any more info regarding that matter would be helpful to. Thank you everyone for reading my post.

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Old 14-09-2015, 05:54   #2
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Re: Bukh DV20 running temp

Welcome aboard CF Proviper.

Going on memory here but I understand the DV20 is raw water cooled. If so, it should run about 50 to 55 C. Any hotter, salt will precipate out and clog the water galleries.

I would expect the overheat alarm would operate at about 62 C.

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Old 14-09-2015, 06:11   #3
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Re: Bukh DV20 running temp

Thanks wot name for your speedy reply. I will keep that in mind when I'm next out. Thanks again
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Old 14-09-2015, 16:27   #4
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Re: Bukh DV20 running temp

My DV20 is now 28 years old and has for the past few years always had a fair bit of steam in the exhaust. The engine temp does not go into alarm even at full throttle in the winter months with sea water temp around 10 degrees C but will in the summer with sea water temp 20 degrees C.
The flow should be about 11 litres per minute at 2000 rpm but mine has never been that high. At last measurement I was getting approx 6 litres per minute.
I can just hold my hand under the exhaust flow so guess we are running at 60-65 degrees C. The alarm set point from memory is 80 degrees C.
For the last 4-5 years I have been using a Saltaway injection system that injects Saltaway into the cooling water at the inlet filter for 20 secs before engine shutdown so that block sits with this solution until the engine is next used. This system has kept us out of the temp alarm area since being fitted.
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Old 14-09-2015, 17:17   #5
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Re: Bukh DV20 running temp

From Section O - Cooling Water System of the DV10/DV20 service manual:
For raw water cooled engines, the thermostat starts to open at 60C and the normal cooling water temp is 70C. For a fresh water cooled engine, the thermostat opens at 75C.
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Old 15-09-2015, 04:50   #6
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Re: Bukh DV20 running temp

Greetings and welcome aboard the CF, Proviper.

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