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Cleaning injectors

 
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Old 05-28-2007, 11:48 AM
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Cleaning injectors

Ok, how do I clean these injectors. Do I need any parts that will need replaced(gaskets, seals etc.)
I rebuild carburetors as a side line, so I got all the dip chems and such to do a proper job, just want to get anything I need before I tear into it.
Thanks much.

BTW truck is 84 f250 4x4 6.9L

How do I add a signature so I don't always have to add what my truck is? Can't seem to figure that one out.
 
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Old 05-28-2007, 11:54 AM
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Dielsel injectors are not cleanable other than fuel additives. The injectors work in thousandts of an inch and one spec of dust will ruin them. Best left to a diesel shop to repair if nessarry.
 
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Old 05-28-2007, 11:55 AM
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to add a sig go up to the blue bar then go to user cp click that and you will see edit sig on the left hand side at the top
 
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Old 05-28-2007, 12:00 PM
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Originally Posted by bigredtruckmi
Dielsel injectors are not cleanable other than fuel additives. The injectors work in thousandts of an inch and one spec of dust will ruin them. Best left to a diesel shop to repair if nessarry.
If they can be done by a diesel shop, they can be done by me. Unless they require some special tool that costs lots and can not be fabbed up.

I am one of those guys that will spend five times the amount to do it myself than it would cost to have someone else do it. Nobody touches my rigs but me.

Not afraid of doing them just need some pointers.

Thanks for the advice.
 
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Old 05-28-2007, 12:06 PM
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Originally Posted by brownieboy525
to add a sig go up to the blue bar then go to user cp click that and you will see edit sig on the left hand side at the top
Not there. Looked there before too. Maybe because I am a newbie? Maybe I don't get that option till I get X amount of posts?
 
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Old 05-28-2007, 12:12 PM
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not hard

I've done them. Not a hard job. On MB you replace the nozzle and adjust the pressure. What you need is a Injector popper. You put the fuel line on and press down on the handle, the pressure reader will tell you the pressure the injector is popping at. Just remember, a little adjustment goes along way.
Robert
 
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Old 05-28-2007, 12:31 PM
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Thats more what I wanted to hear. I read about a how to build a popper so thats on my to do list.

Any more Tips?
 
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Old 05-28-2007, 02:29 PM
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The signature does not show up till you have 25 posts.
 
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Old 05-28-2007, 03:47 PM
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Originally Posted by 72f2504x4390
If they can be done by a diesel shop, they can be done by me. Unless they require some special tool that costs lots and can not be fabbed up.

I am one of those guys that will spend five times the amount to do it myself than it would cost to have someone else do it. Nobody touches my rigs but me.

Not afraid of doing them just need some pointers.

Thanks for the advice.

Well said!!

I had to take apart a set of injectors from a diesel ranger once (it was the only way to get them off the engine). I used a three stage cleaning bath and simply took my time, and wouldn't ya know it, the little four banger fired up the first key, fresh rebuild and all.

Pop testers are real easy to make, I have one on my to do list as well.
 
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Old 05-28-2007, 05:02 PM
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can someone give me some instructions as to how to make a pop tester i think i have a couple bad injectors i want to test.
 
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Old 05-28-2007, 11:24 PM
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Easiest set up to make a pop tester is with portable ram hand pump. They are pretty inexpensive to buy, has fill hole and threaded output fittings ready to go, T in a 3000 psi guage an weld a old fuel line into the fitting. ta da- a pop tester.

I found my tip assemblies with 150K miles were worn to the point of not testing, even after ultrasonic cleaning, so I was able to buy new tips fron Diesel Care and performance very reasonably priced. To set up pressure of pop, I found a .002 shim in the spring shim pack raised the pop pressure by 100 psi.
 
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Old 05-28-2007, 11:26 PM
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Right on time . I was hoping you would chime in KJLYPW. I see I am not the only fan of princess auto .
 

Last edited by David85; 05-28-2007 at 11:31 PM.
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Old 05-28-2007, 11:54 PM
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David85, if you get over to Powell River some time, PM me and we can do a timing session with my new Kent-Moore meter, works hot darn.
 
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Old 06-07-2007, 10:32 PM
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Originally Posted by KJLYPW
David85, if you get over to Powell River some time, PM me and we can do a timing session with my new Kent-Moore meter, works hot darn.
I wish I could, but things are going crazy right now with the construction boom, who knows when I'll get the chance.

I was curious, how close was your timing by ear method compared to the textbook method?
 
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Old 06-08-2007, 02:00 AM
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Very close, with the meter I am 8.3* BTDC, timing mark is just 1/2 line advanced. I was just over half line advanced with the by ear method, and had a bit more rattle with cold advance on than I do now. My milage seems to have gone back up again after messing with the glow plug theory, plus the bark is back from my tail pipe.
 

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