Is it just a spin-on situation or do I have to mess with the Large nut on top of the housing? I know about filling it with diesel but don't know about the actual install. Are there any washers/o-rings I have to mess with? I don't believe the replacement filter came with any.

Thanks to all!

The large nut (17mm I think) on top holds it firm. You have to loosen that to bleed, as well. Snug would be best, and there's a copper washer there too I think. Been a while since I last did mine...

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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg

When it come to the secondary fuel filter, remember, torque is your friend.

You'll see.

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Toblin

'79 300D, "Liesel von Diesel", 235K

I kid proofed the house....but they still get in

There is either a copper washer that needs to be replaced or two o-rings.

Its really a bolt-on filter.

Thank you all! Also, if I fill it to the BRIM, do I still have to prime? My pump is a lil' on the leaky side so I'd rather not mess with it.

Thanks again

Fill it then pump the lunkenheimer valve for a while. I do it for 45-60 seconds typically.

I usually just fill it with Diesel Purge or Two Stroke oil.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Loosen large hex-bolt a few turns with a wrench, then unscrew filter by hand. Installation is the reverse.

I change this filter without filling it with fuel or anything else. It doesn't seem like that much trouble to me to pump the primer pump until it fills both the in-line and the secondary filter, and that way you avoid potentially getting grit into your secondary filter that would otherwise be caught by the in-line filter. Plus, I find it annoying to pour fuel into the filter and then try to get it screwed onto the bolt while it is full and dripping all over the hoses.

There is one o-ring that goes on the bolt, but a replacement doesn't come with the new secondary filter. If you buy the filters from dieselgiant.com (no affiliation), he sells you the o-rings with the filters. Or you can figure out what o-ring is correct by eyeballing the filter. Right now, I think I'm running both of my cars with no O-ring, but that is probably not the best way to go.

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Gene

1983 300d (133k)
1983 300sd (118k)

Not usually.
And that is a 22mm bolt, an adjustable wrench works, you just want to snug it up.

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83 SD

84 CD