Putting in new injectors

[notenuftime]

Real soon here im going to be installing some new injectors going to order some threw Conestoga diesel some Delphi BB, i hear there the way to go good company. This will be the first time i have put in injectors in my 7.3 any one have some tips on how to make the process easier or best ways of going about it, any info will help, will be putting in new return lines clamps seals ect. Need to do this soon truck is loosing lot of power and smokin when cold.

 

[cpdenton]

Here you go.

http://oilburners.net/brian/idi/FuelInjectionServicing.htm

Includes the info on a pump swap too.

 

[OLDBULL8]

No big deal replacing injectors. Make sure the copper washer seal comes out on each injector, if the bottom seal surface is carboned up, scrap it off, use carburator cleaner to soften it, DON'T SCRATCH the seat. If the injector comes apart from the nozzle, grind the threads off that injector body, screw it back into the nozzle, keep turning/pulling up clock wise and it will come out. The return line hose between each injector cap must not force the cap, use plenty of vasoline/grease on the o'rings,watch for any cast parting line inside the cap, gently scrape it off, cut the hose between injectors at least 1/8" short on each end. Use antiseeze on the new injector body threads, torque to 35-40 ft lbs

 

[gandalf]

Here you go.

http://oilburners.net/brian/idi/FuelInjectionServicing.htm

Includes the info on a pump swap too.

Excellent article. It was written by Mel Agne, one of our most knowledgeable members. He also owns and operates Conestoga Diesel.

When I replaced my IP and injectors I printed out the pertinent sections of this article and had them right there on the job, getting greasy with me.

 

[tbrumm]

Here is a really nifty brush for cleaning the bores after you get the injectors out.
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=635579&group_ID=675497&store=snapon-store&dir=catalog

 

[icanfixall]

The above postings cover whats ahead of you very well. Without knowing what year 7.3 you are working in I might suggest another often important skipped item. Way back at the firewall on the drivers side is cylinder #7. If you have a return line that hard metal tube from the injection pump top to this ares please change the seal in it called an olive. Now understand some engines do not have this brass fitting. Most will have it. There is no reason for the hard steel line either. The later 92 and up engines have a different fitting and return the fuel from the top of the injection pump to the injector return lines. Also know there are 2 different size of return lines. The 3/16 is the early style and you can recognise it by the green clamps. The larger 1/4 inch return line is recognised by the red clamps. Please ask questions here if you have any during this work. someone is online 24-7-365.

 

[Matt_INW]

Good info on the image and brush. I'm going to risk removing 1 injector next week as I'm fairly sure the copper o-ring is leaking. Hopefully the injector doesn't come apart.

Good luck on your replacement notenuftime!

 

[OLDBULL8]

One thing I forgot. The return line from IP to the injector cap should be be looped long enough so as NOT to put any pressure on the cap or it will leak fuel. Clear surgical tubing is good to use there, it's more flexible than the rubber hose and you can see if any air intrusion occures.

 

[Clb]

Goes without saying... But
Do clean the topside of eng. well save grime fouling( f o d) snapon makes a cleanout brush for the bore's.

 

[OLDBULL8]

One more thing. Keep the dirt caps on the injectors til your ready to install the caps, one speck of dirt gets in the injector, it can foul it.

 

[IDIoit]

vacuum the top of the engine.
listen to everyone else.
i also used a dab of anti seize on the injector threads.

 

[opusd2]

I have see through hose on my return side and it was more than handy for watching any air that might be in there. Add to it the electric fuel pump and it's incredible

 

[notenuftime]

Thanks every one for the information sure will help, hope to be putting those injectors in soon. I think due to the lack of free time i have i'm going to put in injectors then at a later date run the new return lines, talked a little while to the guys down at Conestoga diesel and they where telling me a little about how to re route the new return lines over top of the pump, instead of down under the turbo. I'll have to look more into that when the time comes.

 

[IDIoit]

really??
youre going to pull the injection lines off, pull the caps off,
and leave your bran new injectors on the bench???
its a 1 minute swap per injector at that point,
shurley you have an extra 10 minutes.

every injector ive changed, the copper washer came out on the injector.

if you install the return line caps twice, id put new o-rings on the injectors. even tho the o-rings are new,
messing with them can tear them.

theres never enough time to do the job right.
BUT THERES ALWAYS ENOUGH TIME TO DO IT TWICE!

 

[notenuftime]

Ya ill just get it all done at once, guess its better to get it all done right than doin it multiple times.