6.2 diesel fuel filter upgrade and fuel pump replacement

in this video i retrofit a newer style fuel filter assembly on my 88 suburban and show how to replace the mechanical fuel pump.
intro music:
Gearhead Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
creativecommons.org/licenses/b...
Contact me with questions:
email: [e-mail]
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it is hard to see the brass fitting part numbers in the video, so look below for the list
you will need-
3/8 FL x 3/8 FIP part # 883666 qty 2
street elbow 3/8 FIP x 3/8 MIP part # 732389 qty 2
3/8 ID (barb)x 3/8 MIP part # 677746 qty 1
1/4 ID (barb)x 3/8 MIP part # 652946 qty 1
fuel filter housing gf647
let me know if any of these part numbers have typos

[@jimmybritt9537]

I subscribed because you like the 6.2 , they are good engines for people who want fuel economy 👍👍🇺🇸

[@joequillun7790]

You got that right. Plus they're all mechanical. No electronic computer crap.

[@cloudyfanning328]

Super thank you for the video. Gas station closed early and I ran out of diesel the next morning 30 seconds after I started it. Back on the road thanks to you bro!

[@henriksrestorations]

Awesome! I probably mounted my mechanical fuel pump incorrectly but thanks to your video I will get the push rod pushed in and get the pump back :) thank you!

[@bornagainsinner3118]

Awesome! Will definitely have to go find that ac video, just picked up a 6.2 suburban with that rear ac

[@Lordofjunk]

unfortunately, I never got around to making the suburban AC video. life got in the way and the AC still doesn't work.

[@erikp2510]

Great video buddy thanks

[@kevinfaherty9887]

I will revisit it when I can get back to it's current location. Stay tuned and thanks for sharing your knowledge. I'm listening n watchin' bro.

[@herrprepper2070]

You do great instructional videos.

[@jnkellogg737]

Thank you for the filter problem fix. I found that filter and housing on Amazon with free shipping. Price was a little more, but with rockauto charging for shipping, it’s about the same.

[@nolanchristoffer2442]

Do you have the link?

[@herrprepper2070]

MATERIALS LIST: BRASS FITTINGS: 2 each, LFA 176 Coupling 2 each, LFA 78265 Street Elbow 1 each, LFA 193 1/4 Hose Barb 1 each, LFA 294 3/8 Hose Barb Thread seal (I used Permatex Thread Sealant With PTFE TO ATTACH FILTER HOUSING TO OLD BRACKET: 7/16” Drill Bit to Make Holes in Bracket 2 each metric size 10 X 1-1/2” length bolts 2 each metric size 10 lock washers I used the wiring plugs from the old filter so I can simply plug and play.

[@codygarner7337]

Eager to see that tank roll down the beach!

[@duggid4859]

Awesome

[@paulherzmann6237]

you ever think about putting a 6.2 Turbo on this thing? I drive a naturally aspirated 6.2 and it's literally getting to slow to keep up with traffic!..... Love the video.

[@Lordofjunk]

I actually have considered installing a turbo. 6.2's are sluggish in stock form. that being said, mine keeps up with traffic pretty good. it's not fast, but it keeps up. look at turning the fuel screw up a little bit and advancing pump timing a couple of degrees. a homemade ram air system and free flowing exhaust helps too. and the best mod you can make is installing lower gears. I have done all of this. all of this his will wake it up quite a bit without a turbo.

[@paulherzmann6237]

Thanks I’ll look into those things… I originally meant to say have you thought of putting 6.5 turbo setup ON the 6.2… That would include bigger injectors, Bigger fuel injection pump, bigger Eleverything! But I definitely will look into turning to fuel screwup in the meantime. Keep some vids coming. Subscribed!

[@paulherzmann6237]

When you say lowering the gears, Do you mean making the gears shorter? I have got them as low as possible in terms of adjusting the throttle cable. But I don’t know any other way

[@Lordofjunk]

i meant changing the gears in the differential. I went from 3.73 to 4.10.

[@joequillun7790]

@@Lordofjunk I gut 4.10s (SM465 tranny), in my 83 C-30 dually. Gets 20 MPGs pulling a double axle trailer. Won't go over 55 tho, (unless going downhill, with a tail wind.)

[@Celzot]

Hello so I am wanting to install a electric fuel pump with relay. I did the Napa fuel filter conversion. I wish I would have found this video beforehand because yours has both in one unit. My question is, do I install the electric fuel pump right after the tank? Or somewhere close to the filter ? Or between filter and mechanical fuel pump? Etc etc.

[@Angrykromag]

Thanks for the video man, would ya happen to have the part number for the filter mount?

[@Angrykromag]

Think I got it ACDelco GF647

[@jothkell9173]

"Bye bye!" Throws part

[@senadmalagic4093]

can someone write me how to properly run the fuel lines from the tank to inection pump for 6.2 Thank you

[@DieselJLUJeep]

Wrong way to prime but every thing else is awesome

[@vallon1225]

Appreciate this video. What did you do about the drain hose from the original system? I'm about to do this swap on a 93 cheyenne 6.2. Should I just plug it? Thanks in advance.

[@Lordofjunk]

I just removed the whole drain hose.

[@vallon1225]

@@Lordofjunk thanks for responding...I did the same.

[@markottinger]

Wonder if the 6.2/6.5 blocks have a bolt that you remove and put in a longer bolt to hold the fuel pump push rod like the small block Chevy's

[@Lordofjunk]

it might, I haven't tried it. the grease trick always worked for me.

[@tomlynn9180]

Do you know why my 85 GMC 6.2 diesel loses prime and quites running after I turn off the electric fuel pump. I have installed electric fuel pump, manual fuel pump, checked all lines and bypassed the switch valve. I have not missed with the fuel lines at the gas tank. Thanks any help would be appreciated

[@Lordofjunk]

sounds like you have a bad check valve. my suburban has a check valve on the front crossmember. you could always run a hose from the suction side of your electric fuel pump into a bucket. that would tell you quickly if the problem is by the fuel tanks or toward the engine.

[@405george]

I see the wiring for the water and fuel was the same colored just the different plug, how do you wire the fuel the heater? seemed a little vague can you elaborate? which wires go where?

[@Lordofjunk]

the fuel heater is easier than the water in fuel light. fuel heater has a red and a black. the truck has a red and a black. cut the connectors off and match colors with butt connectors.

[@405george]

@@Lordofjunk thanks brother keep up the good work.

[@guspizarro6578]

Where are you located? I just bought a 6.2 Detroit and have a few questions. Thank you in advance. Gus.

[@Lordofjunk]

wilmington nc

[@cloudyfanning328]

Can I prime a p3710 Fram fule filter without taking it off?

[@Lordofjunk]

yeah sorta. if you are priming it without taking the filter off, you have to back fill the filter with one of the fuel hoses. it's easier to just take off a spin on and prime it that way.

[@DJJackMillz]

I sent you an email yesterday (mightve went to your junk folder) - Can you please post the part #s to the fittings? I have bad eyes and cant see the part numbers in the video, thank you!

[@Lordofjunk]

Im out of town, as soon I get back I will get on that. you are not the first one that said it is hard to see the part#'s

[@DJJackMillz]

@@Lordofjunk thanks 🙏

[@davejohnson3551]

@@Lordofjunk, first off, awesome video, thank you. That RockAuto part number comes up just the filter. Do you have a part number for the housing base too?

[@Lordofjunk]

it would appear that rockauto doesn't list it anymore. I just checked it. Amazon is also out of stock. just put gf647 in Google, and several different suppliers will pop up. carID and jegs showed some in stock.

[@davejohnson3551]

@@Lordofjunk, it seems that particular filter is scarce as hen's teeth now. And the latest trick for the online suppliers is to take your order, charge your card and then tell you the next day they don't have it, jegs being one of three that have done it so far to me. And of course it takes at least 5 days to get credited back to the card. Could you highlight the important features/specs to look for in finding another substitute? Racor PFF4245 appears close but i'm wary of the in & out ports being same size and not changeable threaded fittings.

[@brycestewart9493]

I tried the part number it didn’t work. What are they called online so I can order one.

[@Lordofjunk]

gf647 I believe

[@kevinfaherty9887]

Not looking forward to swapping my mechanical fuel pump. Aaaaarg!

[@Lordofjunk]

Its not terrible, but its hard to get to in that chassis. Where I work, we used to have p vans (pretty much a bread truck) With 6.2's. The mechanical pump is a breeze in that chassis.

[@kevinfaherty9887]

I had someone help me ( first mistake)replaced fuel tank with larger version. Just got Alt. Belts tightened. Nice n quiet.(for a diesel) then I think fuel pump seem let go. My "helper" I think,reversed lines on back and maybe got sending unit backwards. So have been running off of Jerry Can on passenger seat with fuel line through vent window. And he didn't put firewall filter on properly either. Spraying all over the engine. Fixed filter,had running...fixed belt squeal....seam let go. Stranded in middle of yard. Always something. But anybody who has ever worked on tired iron knows the "real deal". That's just the way it is.