toydrivertom
Trail Guide
How many times does it have to break??
Posts: 206
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Post by toydrivertom on Jul 28, 2011 16:19:55 GMT -5
I'm looking at replacing the injectors on my 7.3 here in the next month or so.Has anyone changed them out and what kind of problems could I run into?
Thanks
Tom
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Deleted
Deleted Member
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Post by Deleted on Jul 28, 2011 16:47:31 GMT -5
Tom, a quick run down on this:
Replace your glow plugs while you're in there.
Do the 50 cent mod while you are in there. This is taking a quarter, grinding a flat spot on the top of it to the top of Washington's head. Slip the quarter in the Under Valve Cover Harness. This will keep the harness from separating at the connection which is a common problem and will leave you stranding. It's cheaper doing this that buying the kit from Ford to fix.
You'll need long and short extensions, and a universal. The back right side valve cover bolts are PITA and you need to contort your hand to get to them.
Remove all the glow plugs. Change one injector at a time. Make sure you get the injector seated by hitting it with the palm of your hand. Don't use the hold down bolt to seat the injector.
Torque the injector hold down bolts to 10 ft/lbs. Now is a good idea to retorque the rocker arm bolts to 20 ft/lbs.
Loosely place the valve covers on. Don't plug in the IDM connector over on the driver's side valve cover. Spin the motor over a few times. You can do it by hand or by the starter. I use the starter. This shoots all the oil and diesel out of the cylinder through the GP hole so you don't hydrolock later. It's an important step because when you remove the injector fuel and oil will fill the cylinder.
Remove valve covers, install new glow plugs (Use only Motorcraft, never Autolite!) and put it back together. It will take a while to restart. Crank it for 30 sec, wait a few minutes, and repeat until it starts. You will burn the starter up if you don't let it rest. It will run rough for about 50 miles until the air is out of the oil lines. Take it out and hammer on it.
Change the oil....
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toydrivertom
Trail Guide
How many times does it have to break??
Posts: 206
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Post by toydrivertom on Jul 29, 2011 16:28:03 GMT -5
Thanks Keith,
That's some good info. Doesn't sound to bad.Just got to remember a few important things.Looks like a day job.I got to find a good deal,these things are expensive.
Tom
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Post by 87B2XLT on Jul 29, 2011 16:54:26 GMT -5
I guess there is no way to de-pressurize the fuel system and vacate the fuel from the engine fuel lines? Yes, the injectors for the IH/Navistar/Ford diesel, the Isuzu/GM/Duramax, and the CTD aren't cheap! I have a project to replace all 8 injectors on a Duramax as soon as we get parts and stuff in...
Dave G
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Deleted
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Post by Deleted on Jul 29, 2011 19:36:19 GMT -5
Dave it has nothing to do with pressure; they aren't under pressure when the engine is off. It's a HEUI system (state of the art in its day) so naturally the oil and fuel ports will be full. If you don't want to shoot it all out the glow plug holes, then you can take the time to suck it out with a turkey baster, but that sucks and is time consuming. Hey Tom, it's just about the same price for some Stage 1 sticks as it is for OE ones. I put the Stage 1's in mine and it woke that pig up. Check out www.dp-tuner.com |
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Deleted
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Post by Deleted on Jul 29, 2011 19:39:10 GMT -5
these things are expensive. In addition to my OCD, and other issues with wanting to play with a lot of different toys, this played a big part in me getting rid of my oil burner for a gasser. |
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Post by joshbaker on Jul 30, 2011 8:59:43 GMT -5
Dang yall ps boys can have all that. And switch back to gas buning trucks lol. I can do a set of cummins injectors (12v, 24v, and CR) in and afternoon. Shoot I have swapped the injectors in the 12 valver 3 times now playing with what works best and can do em in about 2hrs. BTW Tom, If you need some help let me know. Always willing to tear into a diesel.
Josh
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Post by ex-tbd85hilux on Aug 7, 2011 6:59:07 GMT -5
Dang yall ps boys can have all that. And switch back to gas buning trucks lol. I can do a set of cummins injectors (12v, 24v, and CR) in and afternoon. Shoot I have swapped the injectors in the 12 valver 3 times now playing with what works best and can do em in about 2hrs. BTW Tom, If you need some help let me know. Always willing to tear into a diesel. Josh Hasn't your truck been in the shop more then it's been out? Poke.. Poke... Poke... Paul G. |
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Deleted
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Post by Deleted on Aug 7, 2011 9:03:40 GMT -5
Josh, one day you will come to realize that rolling smoke out of a pair of stacks does not necessarily equate to increased power. Ever stop to think that playing with injector timing has a negative effect on engine life?
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toydrivertom
Trail Guide
How many times does it have to break??
Posts: 206
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Post by toydrivertom on Aug 13, 2011 14:37:19 GMT -5
Hey Tom, it's just about the same price for some Stage 1 sticks as it is for OE ones. I put the Stage 1's in mine and it woke that pig up. Check out www.dp-tuner.comThanks for the input Kieth.I'm looking at stage 1 or 2.My thing is looking to gain power for towing and a couple added miles per gal.. I'm not into all the black smoke,trying to keep it well balanced. Josh thanks for the offer, I like doing things like this on my own until I need help. Tom |
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