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6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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Old 02-28-2008, 12:59 PM   #1 (permalink)
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best glow plugs

I am having some starting my 1986 f350 6.9 i think its the glow plugs and i wanted to know what’s the best bang for my money. i didn’t a few searches and still not sure. Someone posted something about a guy named Tim that has duel core gp also so if anyone has a wire diagram for the gp system that would be a great help

thanks john

Last edited by dozer209; 02-28-2008 at 01:25 PM. Reason: wrong sp
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Old 02-28-2008, 03:03 PM   #2 (permalink)
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go with motorcraft gps at autozone or wellman gps on-line. they are the best.
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Northern Woodland & Tree Care work trucks:
old smokey
- 86 Ford F250 6.9 IH navistar non-turbo idi diesel 4x4 dana 60 rear w/ limited slip, dana 44 front wishbone style, w/ 3.55 gears, C-6 w/ oil coolers, manual walbro frb-13 fuel pump, manual wellman glow plugs, K&N air filter no soup bowl and a homemade cold air intake, 3 inch pipe, class 31 heavy duty tractor truck batterys, lots of real gauges.
big drippy - 86 Ford F350 4 door crew cab, long box, 7.3 Navistar IDI non-turbo diesel, 2wd Dana 70 dually rear with 4.88, c-6 w/coolers.
The Swan - 87 chipmore wood chipper chuck and duck old school style. vm motori sun 4505 3.9 air cooled non-turbo DI 4 cyl diesel, rockford pto.
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Old 02-28-2008, 04:59 PM   #3 (permalink)
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Motorcraft. I bought mine from O'Reilly Auto Parts for $8.95 each.
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Old 02-28-2008, 08:38 PM   #4 (permalink)
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Wellman or Motorcraft as stated. Got all 8 Wellman's for my truck for $70 including shipping off ebay with a 1 year warranty
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1986 F-250: 6.9L XL 4x4, 4.10 rear, 4 speed, Wellman GPs, 127,000 and chuggin along like new
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Old 02-29-2008, 06:55 PM   #5 (permalink)
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Wellman by far. I paid just under $70 including shipping from a small operation in Terre Haute, Indiana. Web site is indusadist.com. They will ship within one day by priority mail.
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1986 F250 XLT Lariat Reg. Cab 4X4 6.9, C-6 tranny, Dana 44 front, SRW 10.25 rear -- Bought this truck for $800. VERY little rust, body is straight. Complete engine rebuild with Mahle pistons and ARP head studs among other quality parts in prep for the turbo coming next.
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Old 03-01-2008, 08:56 AM   #6 (permalink)
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i abuse the hell out of my maunal GPs. they keep going!
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Northern Woodland & Tree Care work trucks:
old smokey
- 86 Ford F250 6.9 IH navistar non-turbo idi diesel 4x4 dana 60 rear w/ limited slip, dana 44 front wishbone style, w/ 3.55 gears, C-6 w/ oil coolers, manual walbro frb-13 fuel pump, manual wellman glow plugs, K&N air filter no soup bowl and a homemade cold air intake, 3 inch pipe, class 31 heavy duty tractor truck batterys, lots of real gauges.
big drippy - 86 Ford F350 4 door crew cab, long box, 7.3 Navistar IDI non-turbo diesel, 2wd Dana 70 dually rear with 4.88, c-6 w/coolers.
The Swan - 87 chipmore wood chipper chuck and duck old school style. vm motori sun 4505 3.9 air cooled non-turbo DI 4 cyl diesel, rockford pto.
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Old 03-01-2008, 04:31 PM   #7 (permalink)
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Wellman Automotive Products (WAP) Dual Coil. EBAY has 'em. Supposedly they won't swell if you overdrive them manually.
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1986 F250 4x4 6.9L Banks Sidewinder Wastegated Turbocharged IH Diesel. Wellman Dual-Coil Glow Plugs. K&N Air Filter. C6 Tranny rebuilt for more towing capacity w/oil cooler & magnetic filter. 208F NewProcess Transfer Case with a Gear Vendors Overdrive. Dana50 Front Axle / Ford 10.25 inch Rear Axle ... 4.10 gear ratio. 16 Gallon aftermarket fuel tank #3 (total 55 gal on board full)
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Old 03-01-2008, 07:29 PM   #8 (permalink)
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I've had Wellmans for over five years with a manual pushbutton. I just hold the button in and after 6-7 seconds start cranking while still holding the button in and it fires no matter how cold it is.
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1985 F-250 /4x4/C-6/200,000 miles/owner since 1990/
replaced injection pump twice, water pump twice, vacuum pump once, added manual glow plug button and electric fuel pump,new injectors at 197,000
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Old 03-01-2008, 08:26 PM   #9 (permalink)
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Well, I hope you all aren't pulling my chain with the Wellman deal, cause I just ordered a set of 8.
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1985 F-350 6.9 IDI w/101k miles, RC, 4x2, DRW, 4.10 gears, ZF-5speed, 5" stack, manual glow plugs, flatbed, buckets and center console off a bronco and no soup bowl!
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-RC, 4x4, SRW, 4.10, 5-speed, manual GP's,hand-built grille guard
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Old 03-02-2008, 12:07 PM   #10 (permalink)
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Quote:
Originally Posted by F350farmboy View Post
Well, I hope you all aren't pulling my chain with the Wellman deal, cause I just ordered a set of 8.
I've owned this truck since 1990 and after the Wellman install GP's have been a non-issue. The manual button helps too.
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1985 F-250 /4x4/C-6/200,000 miles/owner since 1990/
replaced injection pump twice, water pump twice, vacuum pump once, added manual glow plug button and electric fuel pump,new injectors at 197,000
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Old 03-02-2008, 10:38 PM   #11 (permalink)
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i got a set of Wellman today off ebay just waiting till they come in now and see how they do thanks
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