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Old 06-13-2015, 09:08 AM   #1
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Okay to drive long hours in heat

We are leaving Las Vegas to get to Yosemite. GPS says about 6 1/2 hours, which comes to about 8 1/2 to 9 hours in a motorhome (at least for us). DH says he can do it, and I believe he can, but my worry is about driving that long in the heat. Will it hurt the tires or the engine? Also, does anyone have suggestions of a good stop along the way? We'd go for a campground with electricity, since our generator hasn't been very reliable lately. One of the circuit breaker keeps popping. We have an appt. next week on our travels at Cummins. But that's another thread...

Doreen & Jack Colnaghi
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Old 06-13-2015, 09:24 AM   #2
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We returned yesterday from a 7 hour drive from the Texas Gulf Coast to North Texas in our 2005 Journey. The temp varied between 96 and 100 most of the day. Our engine temp stayed on the cool side of normal, as did the oil temp. We ran the AC and the Gen most of the trip and had no problems at all. And over an hour was spent in stop and go traffic. We did get a "battery high temp" warning just as we pulled in but we think it was just a fluke.

Jerry & Diane Kovar
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Old 06-13-2015, 09:30 AM   #3
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Coming from a southern state, I've done many drives in 100 degree heat. I've had absolutely no problems with the coach or tires - I think that's a non-factor. A climb in the mountains is definitely harder on the coach motor and 20-30 degrees of temperature isn't a factor with tires.

What will be a factor is your own fatigue. And you're indicating that your generator isn't reliable - that's a problem. Likely in 90-100 degrees, you'll need to run all the house AC you can get. The dash AC will not be enough and it's likely going to get VERY hot if you can't run that house AC.

I ran into a condition where we had a 5500 Onan that was vapor locking in high temperatures. The coach would have gotten up above 95 in front, so we had to stop and buy a generator that was put on the "hitch" area to make it back home...
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Old 06-13-2015, 12:39 PM   #4
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Thanks, helps to know. We are going to leave as early as we can. It's good to hear that it's not an issue. I think the generator will be okay as long as we don't have anything else on. Also, glad to be told we need to run both generator and a/c as we are driving.
Doreen & Jack Colnaghi
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Standard Poodle Ellabelle
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Old 06-13-2015, 03:42 PM   #5
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The heat will not be a worry. You might have to run the generator to give you additional cooling while driving.

However, that is a very long day in an area of heavy traffic and mountains. Why not break it up into two days and arrive while it's still light out and when you'll be more relaxed?
Full-timed for 16 Years . . . Back in S&B Again
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& 8 yr in a 33' Travel Supreme 5th wheel
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Old 06-13-2015, 04:17 PM   #6
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Hummmmm.... High temperatures; sketchy generator; 350 odd miles with two 5000' climbs; straight through drive in a Class A?

"You are a better man than me, Gunga-din!"

Heat effect on the RV is not a real concern except when you try to push it. 60-65 would be right assuming tires are OK and properly inflated. And, the cooling system is 100% up to snuff. Coach AC if the generator has issues would be a concern. Cab A/C is barely going to cut it running into the sun. And that's the issue. Dehydration, fatigue, high altitude, sun beating in the cockpit...your are and health status... are. I'd break it in to two stages.

But I'm not driving...
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Old 06-14-2015, 08:12 AM   #7
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I didn't see anyone else mention the mechanical status of your rv. Make sure it's in tip top condition for a trip like that. 2 years ago we drove across the middle of NV in 106 degrees. Our truck had no problem(with ac running) but it was relatively new and we do all the maintenance on a regular basis as it pulls our 19k 5'r around this country.
Jan & Thomas
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Old 06-14-2015, 09:54 AM   #8
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Another note. Heat has the same effect on a motor as running in high elevations. Not in terms of "hard" on the motor, but in terms of available oxygen. Pilots call it "density altitude". Basically expect a power loss when it gets hot. It can be 20-30%.
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Old 06-14-2015, 01:51 PM   #9
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Break it in to two legs , leave at dawn and arrive in campsite early , why put yourself through the stress
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Old 06-14-2015, 02:11 PM   #10
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Leave early and both of you split the driving of the RV and you will be fine. DH and I will be doing a 500 mile trek in one day in July (Nashville to Monroe, MI). It is tiring ... but we both drive the RV and one can rest on the couch while the other drives, make a cup of coffee .. so all in all ... not really that bad. If your RV is in good shape mechanically, you will have no worries. Just keep it slow and enjoy the drive.
Lynn & Dan Hochradel, & fur kids Carl & Alvin
2015 Entegra Anthem 44B, Dodge Ram 1500 Quad Cab
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Old 06-14-2015, 05:50 PM   #11
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Likely will not hurt the vehicle but might the driver.

I know that some car companies have a test track in Az and head out there long about August and put the cars on the track and run them day and night to see if they can kill 'em.. Sometimes they go back to the drawing board.. Sometimes they get the seal of approval

Same in very cold places

I do not know if your motor home is so tested but Semi Trucks are and you have much the same drive train..

It is the driver I'd worry about.. Plenty of fluids please and keep an eye on 'em.

Home is where I park it!
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