Oil Cooler Installation for 10HP Diesel Generator

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  #1  
Old 11-06-18, 09:11 PM
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Oil Cooler Installation for 10HP Diesel Generator

Hello,

I have soundproof 5kva generator which is using KM186f model diesel engine. Its 10hp Yanmar clone engine.

It is quite hot in Myanmar with about 36C in day time during summer. I would like to install oil cooler in the engine. Has anyone done or any suggestions?

After running about 1 hour, engine is hot and can't even touch it. I think it is normal for single cylinder diesel engines.
 
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Old 11-06-18, 11:04 PM
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By soundproof...... do you mean it's enclosed in a sealed type box ?
I'm not an engine expert but I don't think an oil cooler on an engine like that will do
much for cooling it. It needs a good flow of cooler air.
Do you run synthetic oil in it ? That would be good for it.

KM186F engine
 
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Old 11-07-18, 12:11 AM
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Hi PJmax,

Yes it is in enclosed box. Similar to this one https://www.comx-computers.co.za/i/k...de6700ta_1.jpg

Yes I use semi-synthetic 10w-30 as recommended by manufacture. But not fully synthetic though. Would fully synthetic be better option here? Since they run at 3000rpm, may be its a good option?

If I were going to install oil cooler, I will setup the radiator outside the box with fan as there are some holes that the pipe can go through the box. But wondering if anyone has done it or would it help with the heat.

Thanks!
 
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Old 11-07-18, 05:54 AM
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An oil cooler would help keep the engine cooler. On cool days you should make sure you do not keep the engine too cool. The engine still needs to get up to operating temperature. On cool days you can turn off the oil cooler fan and if it's really cold you can lay a rag over the oil cooler to let the oil get up to temperature.
 
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Old 11-07-18, 12:52 PM
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Your enclosure needs rapid air circulation. If not, you are going to melt down your engine and possibly have a fire. This is an air cooled engine, and if you don't let the air exchange, it will just heat and reheat what little air it has and will get hundreds of degrees.
 
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Old 11-08-18, 01:22 AM
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Hi Pilot Dane,

Thanks for your reply. I will consider adding oil cooler but I released it needs some kind of oil pump to get it working since KM186f do not have built-in pump.


Hi Cheese,

Thanks for your reply as well. As in the picture (link) from my previous post, those generator only have very small holes for air circulation. There is an access panel for decompression lever on top of the generator, so I installed a 6 inches axial fan there to get good air-flow.

Manufacture recommend 10w-30 but since it is always above 32C here, I think it is better with 15w-40? or just stick to 10w-30?
 
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Old 11-08-18, 01:34 AM
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I see... I missed the link first go 'round. I assume this came put together as a unit, this generator is supposed to be in the box it's in? If so, it should have ventilation in the appropriate places to keep the engine cool enough in normal conditions, although your location may be pushing the limits of it. If cooling is marginally inadequate, the oil cooler and a fan on it may be all you need to solve the issue. I would go with a top grade full synthetic oil since it doesn't break down as much with high heat.
 
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Old 11-08-18, 02:05 AM
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Thanks Cheese!

I will check the oil cooler option. Do you think oil pump like this will work?

https://goo.gl/UZQmzC

I need a pump because there are no built-in pump for 186 Engines. Thanks again!
 
  #9  
Old 11-08-18, 02:19 AM
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I would think so... you'll have to keep in mind the oil level if you put the cooler higher than the oil sump. Oil will have to leave the engine, lowering the level, to fill the cooler. Then when the engine is off, it will drain back to the sump and appear to be full. I'd measure the volume of the lines and cooler and add that much oil to the sump and make a new mark on the dipstick to correct for that.
 
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Old 11-08-18, 02:29 AM
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Thanks for the tip Cheese! Its really help!
 
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Old 11-08-18, 09:20 AM
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You could install a blower fan on the housing to force plenty of cooling air inside.
 
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Old 11-08-18, 12:09 PM
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That would probably be the easier and preferred method.
 
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