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Old 09-19-2010, 11:02 PM   #1
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In-line fuel filter

I have a 2005 National Dolphin 3452, Chevy Vortex engine, Workhorse chassis and would like to know where it is located? And what is the suggested mileage to change the filter?
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Old 09-20-2010, 05:59 AM   #2
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mfisher, welcome to iRV2.

The fuel filter on a Workhorse chassis is located on the inside of the frame rail near the driver's side rear wheel.

Your filter will probably have one line at the rear and two lines at the front. These filters are quite expensive and are not available at local auto parts stores. A good source is from one of our members oemtech. Scroll about halfway down the page to Workhorse fuel filter. There is also a reference on that page to an adapter that will let you use a less expensive aftermarket filter. Use of the adapter is not officially approved by Workhorse, so the choice to use it is up to you.

There is no suggested mileage to change the filter. One bad tank of gas could completely clog a brand new filter. Since the Workhorse filter is not available from the auto parts store, and since a Workhorse dealer may not have one in stock, it is a good idea to carry 1 or 2 spares.
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Old 09-20-2010, 09:34 AM   #3
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The 05 will have the new bypass system filter and as far as I know the only place to get them is Work horse but oemteck has an adapter that alows you to use the older less expencive filter.
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Old 09-20-2010, 06:49 PM   #4
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Quote:
Originally Posted by speed racer View Post
The 05 will have the new bypass system filter and as far as I know the only place to get them is Work horse but oemteck has an adapter that alows you to use the older less expencive filter.
Oemtech also has the new filters. Check the link in my post above - $45 vs. up to $75 or $80 at WH. The bypass filter is right above the adapter. Older filter is below the adapter.
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Old 09-21-2010, 12:50 AM   #5
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1. In the tank @ 15,000 miles

2. along the frame rail, usually along the driver side @ 10,000

Note: make sure you have the fuel filter disconnect tool if needed, if it's not the type that you can just take off with two wrenches then you'll need a special tool to disconnect the filter from the line. DO NOT USE SCREWDRIVERS or you'll be buying a whole new fuel line!

good luck
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Old 09-26-2010, 08:26 PM   #6
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My thoughts on the Workhorse fuel filter (and yes I have the expensive one) is not to change it until it's needed. And to that extent, I carry a new one and the tubing wrench to change it. And mine is on the passenger side.
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