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Old 08-24-2020, 08:15 PM   #1
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Running bus in high heat- help!

Ok got our bus now the drive home. Worried it is HOT! Any advice??? It will be about a 15 hour drive through AZ and CA with heat exceeding 100. The short drive to where we bought it and where we are staying we watch it climb from 210 to 230 in about 20 mins . Was 110 though. It is a 444e with a 2000 allison. Thank you!!!

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Old 08-24-2020, 08:52 PM   #2
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If the temp starts climbing, take your foot out of it. If it still heats, downshift and go slower. If it still heats drive at night when it is cooler. 230 degrees is too hot it'll fry the motor. Good luck!
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Old 08-24-2020, 08:55 PM   #3
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Your bus should run cooler than that even if it's 110 unless you are pulling it hard (sustained climbing.....towing...high cross winds etc). Are you revving it hard? You may need to keep it at 2000 rpm.

Check and make sure your coolant is at the correct level. Check and make sure the radiator cap is installed tight and the spring and seal look good. Check and make sure the radiator is not plugged. Blow with compressed air through it and then wash it out. If you are on the road hit a car wash and use the wand with plain water and wash it out good....be careful not to bend the fins.

Check the fan belts are installed and in good shape and tight. Then make sure the fan clutch is operational and spins the fan. If you are running 2000+ rpm and the bus is at 210 or over you should hear the fan spinning very fast. It will be audibly loud.

If you are not having luck getting it to come down drive at night and sleep when it's hot. Don't keep running it at 230 for extended periods.
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Old 08-24-2020, 08:56 PM   #4
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Drive it at night and early am, park from 10am to 10pm. The roads are generally open 24x7

What I did for my Jeep in Mexico towing a boat down Baja, where driving at night is NOT an option, is I rigged a little water sprayer to the radiator. This works well, just a hassle.
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Old 08-24-2020, 09:09 PM   #5
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Can also open the winders up and crank the heaters on high.
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Old 08-24-2020, 09:26 PM   #6
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Ha! That i'll get you to drive at night if nothing else will!
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Old 08-24-2020, 10:22 PM   #7
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The 444E is notorious for running hot esp if it is geared low and you are trying to haul ass with high RPMs or door to the floor..

230 will usually trip the alarms.. you don’t want to run it there.

Fan clutches being bad or clogged split radiators are also an issue on these .. if it was at 230 and you didn’t hear your fan blazing under the hood then that’s where to start.
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Old 08-24-2020, 10:24 PM   #8
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As for 110, I was just in Texas with one of my busses and never saw it reach 200 even when it was 104 out with both air conditioners blasting.
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Old 09-08-2020, 03:08 PM   #9
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Perhaps it will be the only advice to drive at night or early morning
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Old 09-08-2020, 03:59 PM   #10
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Yet another "Asks a question and never comes back for the answer...."
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Old 09-08-2020, 04:15 PM   #11
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Originally Posted by JackE View Post
Yet another "Asks a question and never comes back for the answer...."
How do you know they didn't come back and take advantage of all the responses?
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Old 09-08-2020, 04:18 PM   #12
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Originally Posted by ol trunt View Post
If the temp starts climbing, take your foot out of it. If it still heats, downshift and go slower. If it still heats drive at night when it is cooler. 230 degrees is too hot it'll fry the motor. Good luck!
Jack
Is it really, that's not even boiling.
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Old 09-08-2020, 04:29 PM   #13
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Yet another "Asks a question and never comes back for the answer...."

maybe it got too hot ????

LOL...
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Old 09-08-2020, 05:02 PM   #14
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Is it really, that's not even boiling.

Yes 230 is too hot. Piston rings lose there tension, head gaskets start to let go, valve guides can seize. O-rings on liners get very unhappy.....Thing is that is the coolant is 230 then other internal parts are way hotter. Turn off a hot motor then turn the key back on 5-10 minutes later and see what the gauges then show. This is heat soak out from the hot parts.
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Old 09-08-2020, 05:06 PM   #15
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How do you know they didn't come back and take advantage of all the responses?
The original post in this thread is their only post, made on 08-24-2020, at 05:15 PM . If you look at their profile, it says "Last activity 08-24-2020, 05:15 PM." I suppose there is a possibility they didn't sign in but did look at responses.
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