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Old 03-25-2020, 07:16 PM   #1
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Under seat heaters and engine overheating problems

Has anyone had any issues with their bus overheating after removing the stock under-seat heaters? I'm at that step but now I'm a little more cautious and not sure what to do. Any suggestions?
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Old 03-25-2020, 07:32 PM   #2
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Are you saying that you ARE having engine overheating issues or just exercising an abundance of caution so you don't cause yourself issues later? FWIW, as long as the lines are closed off so engine coolant isn't leaking from the now-removed heater units, you should not expect any significant engine heat issues. The interior heaters don't necessarily play a huge role in cooling the engine because it has a thermostat just like any other engine which regulates coolant flow from the radiator to the engine block.
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Old 03-26-2020, 01:37 AM   #3
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I called the manufacturer about shutting off the heater line cut-offin the engine compartment on the Thomas (Freightliner) buses. They said it would have no effect on the engine. Since then, I have run the engine with the lever open and closed. No difference. Then again, I do not have the heater lines going to the back any more.
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Old 03-26-2020, 04:53 PM   #4
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Why not try and incorporate the heaters in to your build? If you are on the road and experiencing an overheating situation the ability to dump that heat by turning those heaters on high might buy you a few minutes to get the temp down and get safely off the road.
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Old 03-26-2020, 06:54 PM   #5
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Originally Posted by Oscar1 View Post
Why not try and incorporate the heaters in to your build? If you are on the road and experiencing an overheating situation the ability to dump that heat by turning those heaters on high might buy you a few minutes to get the temp down and get safely off the road.
Or rather more practically just so you have heat in the bus while driving. Relying solely on the dashboard heat will make for a chilly ride in colder seasons and climates.
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Old 03-26-2020, 06:54 PM   #6
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Great question I was just curious about this issue too... More or less the loss of additional coolant in the system. I think I will keep the under seat heater but will remove the rear unit and pull the old hardware out.
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Old 03-26-2020, 11:49 PM   #7
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Quote:
Originally Posted by Oscar1 View Post
Why not try and incorporate the heaters in to your build? If you are on the road and experiencing an overheating situation the ability to dump that heat by turning those heaters on high might buy you a few minutes to get the temp down and get safely off the road.
Mine are the enormous mountain package heaters that are roughly 3 ft x 1 ft. In addition they are (A) very LOUD and (B) are massive energy hogs. Literally anything else is quieter and more efficent.

Something like this would be easier to integrate into a build.
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