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Old 08-08-2018, 09:35 PM   #1
Junior Member
Brand: Thor Motor Coach
State: Virginia
Posts: 15
THOR #2640
Primary Fuel Filter

I am trying to change my primary fuel filter. I have a 2013 Thor Palazzo. The current filter has a housing like a large oil filter and a see thru plastic portion on the bottom with a drain valve and an electrical connection. Anyone ever done this? Does the bottom portion come off and is reused? Any help is greatly appreciated.

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Old 08-09-2018, 01:40 AM   #2
Brand: Thor Motor Coach
Model: Chateau Super C 33SW
State: Florida
Posts: 92
THOR #10499
The lower portion sounds like a water separator. That would most likely be reused. The drain valve is to drain the water if you ever had an issue. It's nice to have that visual separator to know you have good fuel.

Dan S.
2015 Thor Chateau Super C 33SW
F-550 Chassis, 6.7L Powerstroke
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Old 08-09-2018, 04:34 PM   #3
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Hooligan2's Avatar
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 310
THOR #2812
If you put your RV and chassis/engine in your signature you may get more specific responses. Some filters change the whole canister, others have a cartridge..
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
George-the Newfoundland
Lily- the Pug
1972 Moto Guzzi Eldorado
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Old 08-09-2018, 05:45 PM   #4
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The Gritz Carlton's Avatar
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,761
THOR #11130
AND...some Cummins engines warn against filling the filter with fuel (common practice) prior to re-installing. Also, there is a specific process to pressurize the fuel system before you try to start it. Lastly...there's a lot of chatter about an "o-ring" that's commonly left off if you're not familiar with where it is. Your engine make model would help with any advice. Lots of videos on YouTube that can help you as well...as long as you know what engine you have.
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
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Old 08-09-2018, 06:10 PM   #5
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TurnerFam's Avatar
Brand: Thor Motor Coach
Model: Palazzo 33.3 34'bunkhouse
State: Alabama
Posts: 1,851
THOR #4735
when mine was changed recently at SPEEDCO, I watched as they performed the service, as they allow you to almost be a 'part' of the equation, nice. The whole fuel filter was unplugged and removed. The water cover was removed, the filter replaced, and the whole container was filled with diesel fuel BEFORE it was closed, and then reinstalled.

I imagine that the 'electrical' that you refer to is the sensor that monitors water in the fuel, providing some type of 'alert' if too much accumulates.
the Turners
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada.... was WC Georgia, then W NorthCarolina, now Lacey's Spring, AL : )
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