Question about 2003 Mercury Mountaineer

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Fuel filter how to change the fuel filter

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[picked this up from another site]
he filter is deep up under the front passenger'sside, right inside of the running board and straight across from thetransfer case. It's protected and hid by a small shield with a larger,silver heat shield (that runs diagonally) in front of that.

You first need to relieve the fuel line pressure by depressing the biketire valve located on the fuel rail on top of the engine under the bigblack cover that covers the whole engine. There are only 4 nuts thathold the big cover on, and once you remove those, remove the hose fuel filter - at.gifthe back of the cover from it's hose guide and the cover will be freeto be removed. Then you'll see the tire valve in front of you on theright side sticking up from a metal tubing line. There should be ablack valve cover on top of the valve. You'll need to have a rag readywhen depressing the valve since a good amount of gas will be relievedand it's under considerable pressure. Be sure the engine's not real hotwhen you do this just in case gas spills on the engine.

Once the pressure is relieved and you've jacked up the passenger'sfront side of the car, crawl under and try to locate the two fuel linescoming from the tank at the rear of the vehicle. The filter is locatedjust past where they make a 90 degree turn.

You'll need to remove the diagonal, silver heat shield first. Thereshould be 2 bolts on one end, and I think 1 on the other. Once it'sremoved, you should see a small cover that has two hex nuts with thefilter being on the back side of this cover.

Once it's removed, you'll notice there is only one line going to theengine and two coming from the gas tank. The fitting for the engineside requires a special tool that's readily available at any checkerauto, advanced auto, type of store. When you get the fuel filter fromthe store, get the tool too so you can be sure you get the right sizeof tool. There's a latch that first has to be popped up that is hookedon the end of the fitting facing the filter. It just pops up then thespecial tool clasps around the nipple of the filter and pushes into thefitting.....towards the line going to the engine. As you squeeze thetool together around the nipple of the filter, push the fuel line awayfrom the filter and it should just push right off.

The tank side lines are a different fitting and don't require anyspecial tool, but they're a bit of a pain to figure out since the wayto release them is not readily visible. Use a very small screwdriverand put it in the trough of the maroon tab that should be facing youand pry the tab out. That will release a tab that should then be freeto hang down. This has to be first released so you can then push itback up through the fitting where it has been clamped in place aroundthe nipple of the fuel filter. It should pop through the top side ofthe fitting, and you can reach up and feel when it is protruding up.Once it is, the fitting should be free from the filter and the line canbe pulled off of the filter.

Be aware that gas WILL run out of the hoses, so you don't want yourface or anything electrical right under the lines. It only takes acouple minutes for them to completely quit dripping after the shortsection of gas line has emptied.

The new filter goes on in reverse order, and the fittings push rightback onto the nipples of the filter. You should definitely feel a'click' on the engine side of the filter when you push the line backon, and the gas side lines need to be pushed well onto the filternipples before pushing the clasps back down and latching back themaroon tab.

Posted on Oct 19, 2008

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