How do I replace injector o-rings? - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 02-14-2010, 03:20 PM Thread Starter
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How do I replace injector o-rings?

Can somebody please describe the procedure to replace fuel injector o-rings? This is to address a major engine oil consumption problem. Any advice is appreciated! Thanks

99 1/2 CC 4x4 dually Lariat A/T 4.10s w/63k miles
Mods-Tymar intake, DP-Tuner , Autometer gauges, zoodad and 4" Bully Dog Exhaust.

Other toys- 88 Suzuki Samurai 4x4 lifted 6"
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05 Jeep Liberty Limited CRD 4x4

Gig'em! '86 Texas Aggie
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post #2 of 7 Old 02-14-2010, 04:45 PM
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Maintain has an awesome video clip about injector R&R, and the injector orings are simple, just be careful, take your time, and put them on in order from the top to the bottom. I had to get a set for 1 injector from a dealer, they came with excellent instructions. Or, a parts guy might xerox them for you


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99 F350 CC DRW 4x4 PSD 6 spd 4:10 Programmed, 4"exh, 8" lift Kelderman 4 link air ride rear, southbend clutch (and arm!) 295/85R22.5's, AFE stgII gauges, push bar, 07 lights, recon smoked fender and rears, ARE shell, DynaTrak combo front,
, Short throw Shifter, Airdog, Regulated Return fuel, Coolant filter, Bypass Oil Filter. Next:BB Turbo, CAC, Injectors, HPOP, Head studs, and anything else I can afford

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post #3 of 7 Old 02-14-2010, 07:17 PM Thread Starter
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I hope this isn't a stupid question, but how do I find Maintain's video?

99 1/2 CC 4x4 dually Lariat A/T 4.10s w/63k miles
Mods-Tymar intake, DP-Tuner , Autometer gauges, zoodad and 4" Bully Dog Exhaust.

Other toys- 88 Suzuki Samurai 4x4 lifted 6"
Polaris 500 HO RSE 4x4 and Yellow 700 4x4
05 Jeep Liberty Limited CRD 4x4

Gig'em! '86 Texas Aggie
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post #4 of 7 Old 02-14-2010, 07:47 PM Thread Starter
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Anybody???

99 1/2 CC 4x4 dually Lariat A/T 4.10s w/63k miles
Mods-Tymar intake, DP-Tuner , Autometer gauges, zoodad and 4" Bully Dog Exhaust.

Other toys- 88 Suzuki Samurai 4x4 lifted 6"
Polaris 500 HO RSE 4x4 and Yellow 700 4x4
05 Jeep Liberty Limited CRD 4x4

Gig'em! '86 Texas Aggie
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post #5 of 7 Old 02-15-2010, 10:33 AM
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http://www.powerstroke.org/forum/7-3...ector-r-r.html

Took me a little while to find it. Go up to the top of the main forums page, there is another 7.3 section there, too many threads to list, I saw another one about diagnosing oil leaks.

I think his user name is Marty now, sorry!

One thing occurred to me, I might be wrong, but I don't think injector orings cause high oil use for long, when an oil ring blows, it will usually push ALOT of oil into the fuel system (oil pressure is way higher than the fuel pressure at the injector) so it will push a gallon or 2 into the fuel, did you pull your filter and check it for motor oil? If it's clean, I'd look elsewhere because the fuel ports are below the oil ports, so oil can't get into the cylinder without going past the fuel ports. I lost an oring once, got a little smoke, but the first clue I had was it started missing and then quit, I checked the oil and was 2 gal low, filled it up, ran fine, 15 miles later I was 2 gal low and on the side of the road again. Checked the fuel filter, it was more oil than fuel in the bowl.

It could be an oring, but I'd advise a little more troubleshooting before you spend $100 and a day or 2 on something that might not be your problem. Also, if you are going to replace orings, might as well do glowplugs while it's apart, and ford has a kit for the under valve cover ("UVC") harness, it's about $18, helps cure the problem of loose connections. Actually, there are a few more things that can be done all at once, Tymar intake, EBPV delete, CCV mod, foil delete in the charge air pipe. You'll be taking all that stuff off anyhow, why do it again later?


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99 F350 CC DRW 4x4 PSD 6 spd 4:10 Programmed, 4"exh, 8" lift Kelderman 4 link air ride rear, southbend clutch (and arm!) 295/85R22.5's, AFE stgII gauges, push bar, 07 lights, recon smoked fender and rears, ARE shell, DynaTrak combo front,
, Short throw Shifter, Airdog, Regulated Return fuel, Coolant filter, Bypass Oil Filter. Next:BB Turbo, CAC, Injectors, HPOP, Head studs, and anything else I can afford

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Last edited by Colotow; 02-15-2010 at 10:36 AM. Reason: more ideas
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post #6 of 7 Old 02-15-2010, 07:35 PM Thread Starter
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Thanks Colotow! I just thought I had searched everywhere... That write up and video will be a big help! And yes, he does have engine oil in the fuel filter bowl as you suspected. Thanks again!

99 1/2 CC 4x4 dually Lariat A/T 4.10s w/63k miles
Mods-Tymar intake, DP-Tuner , Autometer gauges, zoodad and 4" Bully Dog Exhaust.

Other toys- 88 Suzuki Samurai 4x4 lifted 6"
Polaris 500 HO RSE 4x4 and Yellow 700 4x4
05 Jeep Liberty Limited CRD 4x4

Gig'em! '86 Texas Aggie
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post #7 of 7 Old 02-15-2010, 07:53 PM
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No problem and good luck, 75% of what I know about Powerstrokes I've learned on here reading and asking questions.

Be careful as you pop them out, remember you only take 1 bolt out of the holddown and then slide the bracket off of the other one WITHOUT loosening it, and be very careful as you torque them back down, too little and they can leak again, too tight can warp the injector and damage it, it's an INCH lb torque spec. A good manual will be priceless!

Use a mirror, and a good flashlight, and LOOK into each hole, make sure you don't leave a copper o-ring from an injector tip in the bottom, sometimes they slip off when you pull them.

Also, you will probably find 1 "AE" series injector in the #8 hole, it's the one known as the long lead type. If so, it must go back in the #8, the rear drivers side. This was fords fix for noisy injectors, the #8 fires right after the #6, and it was loosing fuel pressure, so they put in one that stays open a little longer to allow it to fill with fuel.

Best help I can offer, see if anyone else that has done a set is nearby and has time to watch and help, makes it easiest of all.


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99 F350 CC DRW 4x4 PSD 6 spd 4:10 Programmed, 4"exh, 8" lift Kelderman 4 link air ride rear, southbend clutch (and arm!) 295/85R22.5's, AFE stgII gauges, push bar, 07 lights, recon smoked fender and rears, ARE shell, DynaTrak combo front,
, Short throw Shifter, Airdog, Regulated Return fuel, Coolant filter, Bypass Oil Filter. Next:BB Turbo, CAC, Injectors, HPOP, Head studs, and anything else I can afford

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