1987 2h- rebuilt my injectors, truck lost power and won't start (1 Viewer)

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i posted in my build thread in the 60 section but i figured it was worth a shot here in the diesel section since my truck is a diesel. i rebuilt my injectors today with denso nozzles and after driving the truck for a few good miles, i felt loss of power, then a couple more minutes later it got real bad and then it shut off. now it won't even start. i am suspecting fueling. can some one help? im consulting the fem right now. i did not use new gaskets at the injector seat cause i didn't have any. can they be the issue. i have some on order now.
 
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Assuming you at least pop-tested each before putting it in....made sure no leaks at the injector halves etc...

Air in the lines? Did you bleed it properly? I know you got it started and all, but if there's a source of air into the lines, it would manifest itself later, like you describe.
 

Tapage

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2H are very simple engines .. if you have fuel at the injectors and good air to the engine .. it should start ..

check for air in the lines at Mark said ..
 
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Ok guys, thanks for the reply. I have not bled the system. I actually did not know I needed to do that. I am new to diesels. The thing is not only did she start but she ran and drove for a good 20 minutes. I do have a leaky injector though. I am installing new crush seals in all the injectors. I do not have a tester to test them after having them rebuilt but I can probably source that or have a local diesel shop do that for me.
 
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Ok guys, thanks for the reply. I have not bled the system. I actually did not know I needed to do that. I am new to diesels. The thing is not only did she start but she ran and drove for a good 20 minutes. I do have a leaky injector though. I am installing new crush seals in all the injectors. I do not have a tester to test them after having them rebuilt but I can probably source that or have a local diesel shop do that for me.
 
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If the injector leaks from the split, you need to lap them a little more. I'm surprised you did not get more leakage from you injectors. The crush washers take care of that.

If you're going to ask a shop might as well get them to put in the washers and heat shields (if needed) in one go. They will probably torque them right. Or not, lol!!
 
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I will not ask a shop. I don't trust anyone. I am torquing everything to spec. there is only one of them leaking from what i can see. maybe the others are leaking into the engine, like it was already mentioned. Regardless, I am still waiting for my parts to tackle this.
 
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When you're ready to attempt a restart, use the hand primer pump to bleed air out of
  1. your fuel filter, and then
  2. your injector pump

Then get someone to crank your engine while you loosen the lines on the top of the injectors (one by one) until you've done all 6. (By the time you've done 2, it'll probably already be running.)

:beer:
 
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When you're ready to attempt a restart, use the hand primer pump to bleed air out of
  1. your fuel filter, and then
  2. your injector pump

Then get someone to crank your engine while you loosen the lines on the top of the injectors (one by one) until you've done all 6. (By the time you've done 2, it'll probably already be running.)

:beer:
Thank you for the advice. I will have people over this weekend so I am going to employ someone's help to get this issue fixed. I have however yet to receive my washers and crush gaskets.
 
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When you're ready to attempt a restart, use the hand primer pump to bleed air out of
  1. your fuel filter, and then
  2. your injector pump

Then get someone to crank your engine while you loosen the lines on the top of the injectors (one by one) until you've done all 6. (By the time you've done 2, it'll probably already be running.)

:beer:
Thank you for the advice. I will have people over this weekend so I am going to employ someone's help to get this issue fixed. I have however yet to receive my washers and crush gaskets.
 
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When you're ready to attempt a restart, use the hand primer pump to bleed air out of
  1. your fuel filter, and then
  2. your injector pump

Then get someone to crank your engine while you loosen the lines on the top of the injectors (one by one) until you've done all 6. (By the time you've done 2, it'll probably already be running.)

:beer:
Thank you for the advice. I will have people over this weekend so I am going to employ someone's help to get this issue fixed. I have however yet to receive my washers and crush gaskets.
 

ontherxs

They call me Tim...
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Same or similar leak issue here. My leak appears to be coming from bellow the fuel return line or at the split. Hard to tell exactly so I need to do some more investigation. Any one who with some experience here, I appreciate the input.

Injector.jpg
N00b question. If it leaking at the split, what does "lap them" mean?

Another thought is that the fuel return is damaged on that injector. This thing.

c7ccacb6446923f667244bf817fb6be4.image.200x162.jpg


Tell me what you know about these and maybe being the culprit and is it worth replacing them as a maintenance task?

81e76d2b18c424790fb22778e4a622bf.image.200x171.jpg
Fuel return line washer

http://shop.cruiserparts.net/index.php?main_page=product_info&cPath=44_3250&products_id=23212

09f88e094b68a81ea6f1bdf9d4553d21.image.200x143.jpg
Injection seat for 2H

http://shop.cruiserparts.net/index.php?main_page=product_info&products_id=34023
 
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.... i rebuilt my injectors today with denso nozzles ...... i did not use new gaskets at the injector seat cause i didn't have any. can they be the issue. i have some on order now.

You should always use new gaskets in my opinion.... Even if you've just reopened things after previously fitting new ones..
InjectorWashers.jpg



....what does "lap them" mean?...

It means that you swerl them around in a figure-8 pattern on oiled emery paper
(of the appropriate grit) to remove any scratches or other minor surface imperfections (that, if left alone, would likely contribute to sealing difficulties).

...Another thought is that the fuel return is damaged on that injector. This thing.

View attachment 953039

Tell me what you know about these and maybe being the culprit and is it worth replacing them as a maintenance task?...

It is hard to get replacements for these. (Probably second-hand is the only option.)

So one should always use new gaskets (so you don't have to ever think of providing extra tightening torque to overcome a leakage problem) and always avoid twisting it when removing/installing injectors...

If that's leaking maybe you can take it to an injection specialist to see if they can repair it..

:beer:
 
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Thanks for the advice. I am getting my gaskets tomorrow. I should have bought gaskets before doing the job. I will report as soon as I get it opened again.
 
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Ok I have updated my thread in the 60 section. My fueling issue was resolved by reinstalling the newly serviced injectors with new washers and re-torquing everything back to speck. it runs great now.

 

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