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Thread: Oil filter adapter leaks no more!

  1. #1

    Default Oil filter adapter leaks no more!

    The oil filter adapter on my 95' has been leaking for quite some time now, so i decided to finnaly fix it last night while changing the oil. I dont know if theres any info on it here, so I thought Id take some pics and get the part #s.

    The adapter is bolted onto the LH side of the block with a large hex head bolt. (forgot the size already!) After removing the bolt the adapter will come right off. Pull the bolt out of the housing and you will notice 1 o-ring on the bolt itself, and another inside to seal the lower portion of the bolt. Both can easily be removed with a small pick or screwdriver. Also remove the large o-ring that seats the adapter to the block. All of my o-rings were hard as a rock and split into pieces when removing...thus the reason for my leak.

    After all o-rings have been removed, clean the entire adapter and bolt with a carburator/part cleaner or similar solvent. Pay special attention to the groves the o-rings will be seated into. Apply a thin film of oil to the new o-rings and place them in their proper location. All three are of a different size. Be sure to replace the copper washer between the bolthead and the adapter as well. Before bolting the adapter back onto the block, be sure that the mating surface of the block is clean as well.

    Re-tighten the bolt to its proper torque (someone will a service manual feel free to share this spec), install your filter and oil, and away you go! With no more leaks....from this location anyways.

    The part numbers for the three o-rings from GM are as follows:
    Big O ring 12559095
    2 small O rings 23500360
    Copper gasket 23500358
    96 GMC 2500HD 6.5TD NV4500 5spd, Vin F, Knaphide utility body, 65gal aux tank, 4in straight pipe exhaust, LuK clutch, k47 air box w/amsoil filter, FTB mod and filter relocation, Walbro FRC-10 and Racor pre-filter, TM, Heath PMD isolator, A-pillar guages boost egt's and fuel pres., in-dash CB, Redline LED brake controler, air bag rear suspension, factory dual t-stats, OPS ext. hose
    06 Chevy 2500HD LBZ Duramax LT3, tinted windows, 265/75/16 tires, Redline LED brake controler, Cobra in-dash CB, 5" MBRP turbo-back exhaust

    Family business includes several Duramax/6.5/6.2 powered trucks

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  2. #2

    Default



    96 GMC 2500HD 6.5TD NV4500 5spd, Vin F, Knaphide utility body, 65gal aux tank, 4in straight pipe exhaust, LuK clutch, k47 air box w/amsoil filter, FTB mod and filter relocation, Walbro FRC-10 and Racor pre-filter, TM, Heath PMD isolator, A-pillar guages boost egt's and fuel pres., in-dash CB, Redline LED brake controler, air bag rear suspension, factory dual t-stats, OPS ext. hose
    06 Chevy 2500HD LBZ Duramax LT3, tinted windows, 265/75/16 tires, Redline LED brake controler, Cobra in-dash CB, 5" MBRP turbo-back exhaust

    Family business includes several Duramax/6.5/6.2 powered trucks

    Proud Member of the NRA

  3. #3
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    Default

    Good to know. I need to do this on my Suburban.
    †††Dave†††

    1994 K2500 Suburban
    305/70 Maxxis Bighorns, 17x9 H2s, 1.5" TT, 2" blocks, 58600 Monroe Loadajust, 4" Diamond Eye, SSD mount, #9 resistor, 97 cooling upgrade, 40HP nozzles, Heath Turbomaster, currently undergoing '92 body swap

  4. #4
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    Same here, good to know
    Matt



    '05 1500 Suburban Z71 51000 miles Wifey's ride

  5. #5
    6.5 nut job/addict
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    There are 2 or 3 different styles of the oil filter adapters. The o-rings are different on all 3. Some didn't use the copper washer either.
    Barry



    I am not on the Heath Bandwagon

  6. #6
    Registered User orrum's Avatar
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    I have a oil leak in that area. I tightened the valve covers up but still seeing oil on the filter. Do I have a adapter like this? I am ready to change the oil but if I need to put new adapter orings in order to fix the leak I need to know so I can get them. Also which ones do I need?
    -Bill....Worlds Greatest One Legged Cowboy....
    1991 GMC 3500 6.2 N/A Dually Std. Cab LB 2WD 4L80E
    Snorkle and Muffler Breather removal mod....Sounds GOOD! Homemade air ram hooked to breather. OPS Bypass Mod. LP Primer Switch in cab and under hood. Fifth wheel install bolt in the bed plate type...Made from scratch and welded by me! Glowshift 30psi electronic fuel pressure gauge. Walbro LP and 30 micron pre filter. WVO filter on fender well pre IP.

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    Runs on Wvo for 10000 miles now

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    Used to increase my testoeterone level

    1971 WW Gooseneck Horse trailer with Homemade Living Quarters
    Its a Classic too! LOL


    Mods on the List: Extra quart oil filter...Injector line heaters for wvo...Trans. Cooler...Trailer Brake controller...Oil Cooler SS lines...Manual glow plug switch Mod and new glow plugs...Fix Air Conditioner...Paint faded hood and top.

  7. #7
    Just Another Diesel Guy Turbine Doc's Avatar
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    Not coming from there on yours Bill the adapter is on 4x4 6.5s I'm not sure if the 6.2 uses same adapter in the K series truck. You need to be posting your questions in 6.2 forum Bill while both engines are kissin cousins, there is enough difference in them that we segregated out to the 2 different engine types for Q&A.
    Tim (A-ACLU #29)
    98 (S)K1500,3.73 gear,4L80,Heath 4"exh,Amsoil air & bypass oil flts,Heath fan clutch,Stans Xover,pilar mtd BST/EGT/TRN,remote 12v fan tran cool,PML trans pan, PML diff cover, Hi pops, Heath PCM,Heath remote FSD, HDP Balance Flow, Heath lift pump, SSBC front calipers, EGR rear disc conversion, Goodrich brake lines, No-Slip locker, Roadmaster suspension, Lube specialist oil lines, Putnam lock & load hitch, A-team turbo.

    98 C1500 Burb Heath reflash,exhaust,ATT, Heath cooling system, Heath FSD

  8. #8

    Default

    yeah BK is right, I learned the hard way. There is atleast two different ones and the bolts are different. I chucked it on my 93 as I had a lift and no longer needed it.
    Forum Troll
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  9. #9
    Well it hits on 7 of 8... WarWagon's Avatar
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    Quote Originally Posted by bk95td View Post
    There are 2 or 3 different styles of the oil filter adapters. The o-rings are different on all 3. Some didn't use the copper washer either.
    X3 on this! Got 95 parts and had the 93 oil filter adapter on the burb. Get dealer parts and make sure they are the right year. The nightmare for those of us with many years of engine parts to choose from gets tricky. 1993 uses the copper washer. 1995 uses an oring instead.
    Not enough room in sig for all the stuff I have that LeroyDiesel.com sells.

    2003 Dodge Ram 3500 SLT QC LB HO Cummins 6 speed handshaker w/ Pacbrake. Factory 3rd pedal anti theft.

    1993 Chevy "Patch" K2500 6.5 Diesel LB project beater... Now a 6.2 re-power w/6.5 NA heads. Gapless rings. Walbro FRB-5. A-Team Turbo. ARP head studs. 6 banger Trans tune chip I think I have changed, replaced, or tightened every bolt and nut on this thing!

  10. #10
    Registered User orrum's Avatar
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    Thanks Doc I will post in the other forum.
    -Bill....Worlds Greatest One Legged Cowboy....
    1991 GMC 3500 6.2 N/A Dually Std. Cab LB 2WD 4L80E
    Snorkle and Muffler Breather removal mod....Sounds GOOD! Homemade air ram hooked to breather. OPS Bypass Mod. LP Primer Switch in cab and under hood. Fifth wheel install bolt in the bed plate type...Made from scratch and welded by me! Glowshift 30psi electronic fuel pressure gauge. Walbro LP and 30 micron pre filter. WVO filter on fender well pre IP.

    1975 Mercedes 240D Classic
    Runs on Wvo for 10000 miles now

    2001 Ford Mustang
    6 Cylinder
    Used to increase my testoeterone level

    1971 WW Gooseneck Horse trailer with Homemade Living Quarters
    Its a Classic too! LOL


    Mods on the List: Extra quart oil filter...Injector line heaters for wvo...Trans. Cooler...Trailer Brake controller...Oil Cooler SS lines...Manual glow plug switch Mod and new glow plugs...Fix Air Conditioner...Paint faded hood and top.

  11. #11
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    Default

    IIRC, Leroy PMDCable sells the o-ring kit. I am not sure for what year though.

    Great alternative if you cannot find it at stealership.
    #####---------######-------#####
    1995 6.5TD GMC Suburban
    PMD in Bumper
    Leroy Diesel FS PMD
    4" Warpspeed Exhaust
    KD LP/OPS Harness
    Bosch Duraterm GP
    Heath Turbo-Master
    AD244 Alternator

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