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Oil and fuel separator wonít budge.

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  • 1 Post By ocnslr

Oil and fuel separator wonít budge.

Old 06-15-2019, 08:38 AM
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Join Date: Apr 2018
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Default Oil and fuel separator wonít budge.

Looking for tips on getting these guys off. Itís on a merc 5.0 from the early 2000ís. The fuel filter looks good on the outside not rusted out or anything but has a date written in sharpy of 11/09 lol. The oil filter up top wonít budge either. I sprayed some anti seize around the base where it looks rusted to soak and will try again later but neither filter is on a firm base. Itís like both are remote filters on a bracket. Iím afraid if I twist too hard Iím going to break something.
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Old 06-15-2019, 09:04 AM
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At first I thought you were referring to the fuel-water separator in your title, but it appears you are referring to TWO filters on the engine - the oil filter and a separate fuel filter.

Although I am not familiar with your engine, my experience is that the filter structure is never as solid as the mounting base/surface and you can use moderate to extreme measures to break the filter free (or otherwise remove it), without damaging the mounting base. Of course, this will likely be messy with the contents of the filter leaking out.

The base has a gasket and while appearing rusted is likely not the problem site. In an extreme case, the metal threads might have seized and those are inside the filter body, so you may damage the mounting area with removal.

If the filters are on a separate base, and not integral to the engine, then I assume that the entire assembly for each filter can simply be disconnected from tubing, unmounted, discarded, and replaced. This might be both the simpler and, in the long run, least expensive solution. Twisting hard enough here to free the filters may damage the associated tubing and/or the bracket.

I would also be concerned about what other normal maintenance was skipped by the previous owner. Perhaps drain the oil pan to get the sludge out.... JMHO.

Good luck.
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ocnslr is offline  
Old 06-15-2019, 12:23 PM
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Default Filter wrench

Just gonna have to muscle them off and deal with the consequences after. Thatís what a service tech would do.
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Old 06-15-2019, 12:38 PM
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There are loads of good suggestions in this recent thread:

Oil filter getting so tight I can't hardly get it off.
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Old 06-15-2019, 01:27 PM
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Quite often you can remove a stuck filter with two metal filter wrenches with their handles positioned 180į apart- pulling on one handle and pushing on the other. For super tight instances and if there is room, a cup filter wrench on the bottom with a ratchet or breaker bar combined with the two strap wrenches will normally work. Of course you need one more person to pull on the ratchet or bar.

With the new filter, coat the rubber ring with clean engine oil and hand tighten only - no tools.
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