[Art]

My 8V92TA never gets over 175 degrees even with the OTR in summer with high idle on and sitting. Heck it will cool down when sitting after a run and just idling. Your shutters open?

[Archived]

You may or may not have a problem. The starting point is to try to remember what was “normal”.

A cooling system has to have enough capacity to be able to maintain the operating temperature despite ambient temperatures. Once loaded and up to temperature such as that of the thermostat the generator should be able to operate within that small temperature range regardless of if it is 50 degrees out or 100.

If the temperature of the generator increases with ambient temperature rise there might be a problem and depending on a number of factors relating to the installation it could be as simple as a lost or damaged baffle, a bad fan or fan motor, a loose belt, a plugged radiator, a bad water pump. or even the open bay door.

[Dick]

Ron, on my 94 CC I had to have the bay door closed to draw air through the radiator. If I had the door open the temp would shoot up into the 200’s, door closed 190.

[Archived]

My bad on the other comment about 8V92 motor. My gen set 15 kw with Kubota motor ran hot after i got it and had to R&R the blower motor. it finally stopped. While at it, if like mine and radiator is set up in a side bay added a Summit racing 12 volt blower in front of radiator pushing air thorough radiator to blower. . Stopped all the heats issues.

[Archived]

On our last Prevost 1980 Le Mirage the gen door had to be closed also to pull air across the radiator to cool it.

[Archived]

Thanks for all of the replies. This is a Kubota V1903 located in the second bay of the driver’s side. I have the coach since Nov 2016 and the normal temperature has been in the 185-190 range. I did replace the thermostat last July. I have not changed the belt.

I begin travel for 12 days starting on July 12 so I need to get this corrected. Plan is to pull her out of the bay. Check the fan belt. Give it a cleaning. Check the oil which should be alright since I had it changed in February, and have run it less than 25 hours since then. I will also check the hoses.

What should the coolant level be in the overflow bottle? I have seen some on the PC say it should be low while other say it should be in the middle.

I follow Jon’s guidance to exercise the generator often and with load. If she is moving we are running the generator. It now has 2,850 hours.

Thanks again for the comments.

Ron

[Archived]

The overflow bottle is to handle expansion of the coolant as it heats, and as it cools to have its contents drawn back into the engine coolant system. Usually 1/2 full when cold is a good starting point.

You did not mention if the higher temp is due to the open bay door. Most if not all generator installations have a means by which air flow is directed so the hot air being exhausted from the radiator is not returned to the radiator air intake. Make sure an open bay door (or a crushed or damaged baffle) is not allowing hot air to be drawn back through the radiator.

Also verify the cooling system is full and does not have any air bubbles that might impact operation of the water pump.

[Chuck & Katrina]

As always, thanks for the insight, Jon. I hope to be at the coach over the next few days. I will have the coach out to fuel up which requires a 20 minute ride to the truck stop. I will run the generator and keep a watch on the temperature.

The overflow bottle is half full. I check that before every drive I take, check again at each parking break, and and when shutting her down.

Ron

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2000 Featherlite H3-45

2024 Jeep Grand Cherokee

Leesburg, FL

[Archived]

FWIW, my powertech (4 cyl Yanmar turbodiesel) runs about 160F normally. I have not checked the thermostat but it appears to function normally as I have a fairly quick warmup from whatever to 160.