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Old 05-04-2014, 04:16 PM   #31
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Don,
Don't know if this affects your coach or water pump issue (if that is the cause of your leak) or if Freightliner will give you any assistance with this, but there was a problem with the fan hub that they used. It should have had 5 bolts and only had 4 bolts. Take a look at this thread and maybe Freighliner will help you. If not, at least you can get them to put the 5 bolt hub on. Harp on the fact that this is a safety issue that if the hub comes off while at highway speeds, it could sever hydraulic and other lines and causing accidents. Also, if it does come off it could throw shrapnel out the radiator hitting other vehicles causing accidents. I ended up writing to the DOT and other government agencies (New York State Dept of Consumer Protection) and they got Freightliner to change the hub on my '08 coach when I had it.
Good luck,
Tom

Here is a link to that thread.

Radiator Fan Trouble
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Old 05-04-2014, 05:36 PM   #32
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While not being sure how the low coolant sensor works, (if it is a switch, or a sensor designed to detect open or short) however trying to override the shutdown really increases the possibility of engine overheat damage. When in power reduced mode, the engine starts reducing the number of working cylinders and also alternates the operating cylinders to reduce the heat generated by pumping air through the non-power producing cylinders. Also, the temp sending unit requires liquid for a true reading. If you lack coolant, your gauge could show OK while you are warping the head. Once warped, it can go quite a while before problems show up. Just trying to help you save unnecessary repair and inconvenience. Good luck, and I am interested in the final report.
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Old 05-04-2014, 06:06 PM   #33
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We had a coolant leak on our 2014 390BH on our first trip last month with only 1,300 miles. We also learned how to get into the engine compartment. It turned out that a pipe that went into the the engine block next to the head where it split off to the turbo charger was loose! It must have come that way ftom the factory because there is no way it could have turned with the hoses on the top. We also had a bad solenoid on the DEF tank. Got a 2 for 1 repair.

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Old 05-04-2014, 07:31 PM   #34
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Here's what I would do, while cold fill the tank slap to the top then drive it there. Carry some water with you that way if it goes into shutdown you can refill it. Leaking like it is the pressure will bleed off fairly quickly so you can remove the radiator cap fairly safely, though still wrap a towel around it and be ready to move just in case.

Pull the cap, fill it back up, finish driving. I wouldn't pull the auto shutdown as that will likely let you know you're running low on water before it gets a chance to heat up.
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Old 05-04-2014, 08:33 PM   #35
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I would sure be looking at the water pump. It has a weep hole where coolant escapes when the shaft seal fails. On a Dodge pickup it's not much of a job but in your MH it could be a booger. Water pump only has two bolts on it and after you unwind the serpentine belt it's not that much of a job.

I work as a mechanic for the Az DOT fleet operations, been doing it for many years now.
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Old 05-04-2014, 08:44 PM   #36
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I forgot to mention, if you need to open the cap while the engine is hot, find any cooling system hose you can easily reach and squeeze it. If it squeezes easily, then the system pressure is gone, if it's hard and obviously under pressure, proceed with caution.
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Old 05-08-2014, 06:27 PM   #37
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OK guys, sorry for keeping you waiting. Thanks to all of you for your encouragement and great information. I decided to change the water pump myself, and like most things moving it turned out to be a lot easier than I expected.

I have detailed, with pictures what is hopefully the beginning of the end of this saga here. If you have any final tips about installing the new pump, please post them here.
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Old 05-08-2014, 08:39 PM   #38
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question

Quote:
Originally Posted by dontech View Post
OK guys, sorry for keeping you waiting. Thanks to all of you for your encouragement and great information. I decided to change the water pump myself, and like most things moving it turned out to be a lot easier than I expected.

I have detailed, with pictures what is hopefully the beginning of the end of this saga here. If you have any final tips about installing the new pump, please post them here.
As you are charting new territory for me I have a question. Did you have to remove the fan shroud? It always worries me as there appears to be so little room to work at the front of the engine. I assume you are working from the inside of the coach and not underneath. Could you get a couple pictures of the larger work area?

Thanks and good luck.
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Old 05-09-2014, 12:56 AM   #39
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Yes, I was working from the bedroom access, sitting on top of the engine. I did not have to remove anything except the belt. There is probably 8 or 10 inches of room to get a wrench with extension in place. I was surprised myself. There is plenty of room on the rocker cover to sit on and it is very substantial. You have to find a place for a foot and be careful not to dislodge any wiring or thin metal tubing that is all around.

If you scroll up in my post on RVPics, you will see a shot of the opening and engine from above.
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Old 05-09-2014, 09:39 AM   #40
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Fantastic job on the pics and description, Don. Makes me believe that I will be able to tackle some repairs and maintenance when I'm out of warranty.


Rich
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