Fuel Filter Help

[HASSON1911]

Today I had to change my primary fuel filter because my seal blew and after looking at it, there was no way i was going to reuse it. but the primary filter that was in my truck was mesh, and the one, the previous owner gave me was like a stone filter. And both looked to small for the original military canister(shorter by about 2-3 in.). So my question for the primary filter is: is the correct number for NAPA 3511, and should it be mesh or stone kind. and will it be shorter than the canister.

 

[HASSON1911]

Also, a noob question here on the driver side there is the primary and final filter canister, were are these secondary i keep reading about?

 

[wsucougarx]

The primary filter is the shorter version (3511). Different companies use different materials for the filters...doesn't really matter. The secondary and final fuel filter (on the driver side) is NAPA 3512. They are much longer than the 3511.
The reason the primary filter is so much shorter is so water can accumulate at the bottom of the canister. If you have a longer filter in the primary filter, then the filter will act as a wick to draw up the water into your fuel system.

 

[HASSON1911]

Thanks mike, I think I have a "special truck", because the only filters i see one there is a primary and final(both next to each other on driver side.), no secondary.

 

[Dr.Jay]

The fuel / water separator canister is located at the front right side of the engine compartment attached to the frame below the alternator. The secondary, and final filters are in the canisters mounted directly to the engine, on the left side behind the Injection pump.

 

[doghead]

Look under your alternator.

The short white stone filters are washable/reusable.(for the primary filter only)

The filter position should be obvious if you looked at the -20P TM.

 

[Heavysteven]

It's at 6:35 in this video on YouTube

[media]http://www.youtube.com/watch?v=k5UUpqagrf0&feature=youtube_gdata_player[/media]

 

[doghead]

HS,

Oh, and it's covered(with pictures) in the -20 TM, under fuel system maintenance(which you should be using to do this task).

 

[HASSON1911]

Okay thanks guys from DH pictures its my secondary that I'm changing out so if the truck and obvious the pic is correct the filter I'm changing is actually the secondary filter but for some reason the canister "holder" its stamped primary? Any guesses on that reason? It would have been nice if my truck let me learn this on my own instead of rushing me to learn. Thanks guys for your patience
Also, thanks Steven nice vid and truck!

 

[doghead]

When you tighten it up, do not rotate the can. Tighten the bolt. 15 ft/lb.

 

[porkysplace]

There is a drain on the primary which should be drained on a regular basis to remove water.
that's covered in the TM also.

 

[HASSON1911]

Thanks will do. Another note is it alright for the canister to be off for 3 days while the filter and gasket come, or should i just put an empty canister on.

 

[doghead]

Off is fine.

 

[DieselBob]

Leaving the can off won't hurt anything. Just my but I have been using the 3113 filter for the primary. With the ears in the center of the cartridge it self centers on the seal surface in the filter mount. I also changed to using the 3540 for the final filter because it is a 6 micron rating instead of the 10 micron of the 3512.

 

[HASSON1911]

Okay, thanks guys can't wait for the parts to come in so i can get her running again. When i finished cleaning off the secondary I notice rust in the bottom of the canister, probably the reason why i couldn't open it to drain it. Is there a commercial canister or should i reuse it?

 

[DieselBob]

I just clean the inside of mine with some paint thinner and a scotch brite pad.

 

[HASSON1911]

I owe you guys, Thank you!

 

[doghead]

Clean it and replace the drain if needed. You did turn it the correct direction, right? Look close or try both ways!

It's a standard pipe thread drain cock. You can get a Tee handled drain at an Ace Hardware(or whatever chain store you have locally).

http://www.google.com/imgres?hl=en&rlz=1T4GGLL_enUS378US382&biw=1366&bih=579&tbm=isch&tbnid=omXF0VYqYDVQqM:&imgrefurl=http://www.okokchina.com/product/Metals-Minerals/Non-Ferrous-Metals/Copper-Products/&docid=EuV57pgRm3NpaM&imgurl=http://www.okokchina.com/Files/upimg9%25255CMember_497419.jpg&w=400&h=399&ei=HOlbT42mCafr0gG-s7HiDw&zoom=1&iact=hc&vpx=1072&vpy=123&dur=1404&hovh=224&hovw=225&tx=113&ty=119&sig=118373676326291282293&page=1&tbnh=116&tbnw=110&start=0&ndsp=24&ved=1t:429,r:7,s:0

 

[HASSON1911]

Yep i did turn it the right way but when i got it open it was stuffed with unidentifiable residue.