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Old 07-19-2019, 09:38 AM   #1
Mini-Skoolie
 
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What is this hole in the floor?

Hi everyone,
I have a random hole underneath the rubber flooring of the bus. It appears to be around the fuel tanks. Should I seal it up? Any idea what it is for?
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Old 07-19-2019, 09:51 AM   #2
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I'm guessing that is your fuel level sensor (or a sensor for something) and the hole is the only access to it. You can seal it up but if you ever need to access it in the future... well... it'll be a problem.

My life experiences have taught me that you never need to touch a thing as long as it is easily accessible. As soon as I make something difficult to access, I need to get to it!!
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Old 07-19-2019, 09:54 AM   #3
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See the wires in the hole? That is access for the fuel sending unit. If you do cover that hole be prepared to drop the tank if you need to replace the fuel sending unit. Or, be proactive and replace it now and then cover the access up. Sending units are fairly inexpensive.
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Old 07-19-2019, 10:01 AM   #4
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Thanks guys!
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Old 07-19-2019, 11:28 AM   #5
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Yeah, it's definitely for accessing the fuel tank. My Bluebird has a hole like that in the floor, and there was a hole in the original plywood too. The hole was only covered by the vinyl flooring and a metal cover screwed in place on top of the vinyl, so it was obvious no one ever felt the need to access the tank through that hole. I plan on building a water resistant hatch, and then a cupboard with an easily removable bottom.
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Old 07-19-2019, 11:48 AM   #6
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What are you going to install in the bus in that spot? If it’s a cabinet, maybe you can just make a cover for it and make it accessible later. I can imagine dropping the tank would be a bit of a PITA, but with a bus at least you wouldn’t need to jack it up
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Old 07-19-2019, 11:52 AM   #7
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More than a bit of a PITA, if, like mine, there's a crush cage enclosing the tank.
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Old 07-19-2019, 11:55 AM   #8
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@Danjo, yeah, that's the great thing about working on buses. I gave up working on cars some years ago when my back started bothering me a bit because they were just too low. But there's plenty of room under the Bluebird.
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Old 07-19-2019, 12:04 PM   #9
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I checked on mine to see if the sensor was accessible from under the bus, and while it may be a PITA, I figured that access hole has probably never been removed yet and the covering of it was less critical than I think. I never heard of tank sensor issues like Im have other common issues on buses.
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Old 07-19-2019, 12:13 PM   #10
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Yeah, you're right. I don't remember reading much about problems there, but I have read at least 2 threads here that contained warnings that covering it up so that acceess was difficult would be unadvisable.

I could tell when I started removing the floor that mine had never been accessed, so I intend to cover it up but still have it accessible without tearing up anything.
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