Injector rebuild

[neepsjeeps]

I have seen the injector pop tester here and on ebay, and i was wondering how hard the injectors are to rebuild and is their any writeups or info about them? even a blow up of ones guts would be nice.
I have lots of tools and i have rebuilt powerstroke injectors, these seem like they would not be very difficult i was just wondering what is involved?

[dieseldummy]

These injectors are easy to rebuild. If you have a pop tester, good cores, new washers, and a little bit of patience it can be done. Basicly the injector unscrews in the middle and the guts come out. Clean it all up good and inspect all the parts for wear. When you've verified that all is well you can slap it back together and test it. If it doesn't pop where you want it you'll have to pull it back apart and ad a shim to the spring setup.

[neepsjeeps]

So what im wondering is i just need a set of marine nozzles and some shims? are their many other parts to wear out? the truck im working on has at least one injector that is shot, and im wondering what parts wear out, is it the shim and springs that wear and lose tension (dropping the pop point?)
im sure if i just pull the injectors and look at one i could figure it out but also where is a good place to get the raw parts?

[dieseldummy]

Usually all you need it nozzels, shims(somtimes), and the "crush" washers. Any diesel pump shop should be able to set you up with what you need. It's come to my attention that the cheap marine nozzels popping up places are chinese knockoffs... I have a set and they work fine, so I guess it's just personal preference.

[neepsjeeps]

how do you know how much to shim? and do the shims come in a pack of various sizes?

[bbbear]

I have seen the injector pop tester here and on ebay, and i was wondering how hard the injectors are to rebuild and is their any writeups or info about them? even a blow up of ones guts would be nice.
I have lots of tools and i have rebuilt powerstroke injectors, these seem like they would not be very difficult i was just wondering what is involved?

I'm a newbie, and have only owned my GMC 1986 6.2 L for a little over a week. But I also drive a MB 300D T and have rebuilt those injectors, as per the MB pictorial at dieselgiant.com. ( which should also work for you ) I'm no mechanic but it was very easy. Do one at a time. Put it in the vice and carefully loosen it. Then lay it on some wax paper on the work bench. Don't touch anything with a rag.. If nothing else, then use a newspaper. Be very careful when taking them apart, Lay the guts out, clean everything, inside and out, with brake cleaner. Drop in new nozzles and the rest of the stuff, and number the injectors with a wax pencil or something that wont rub off, so they go back into the same hole... After you're done take them to a diesel shop and have them pop tested and put each injector back into its original cylinder. Also don't forget the heat shield!

But before you do all of that do a diesel purge with Lubro Moly.... One of the few additives that really works! You may not need rebuilt injectors!

[neepsjeeps]

Found new injector testers at Hardysolar.com 129.95 new..im going to order one and get busy with these..

[bbbear]

Found new injector testers at Hardysolar.com 129.95 new..im going to order one and get busy with these..

Thanks for the tip. A pop tester may be in my future. I'll soon rig this old truck to burn SVO and will eventually clean all internal injector parts and install higher pressure nozzles in order to get a finer spray pattern. I'd also like to balance each injector to an exact pressure, and that's a lot of shim fiddling. $129.00 for a pop tester is cheap compared to taking them to a good disel shop.

[bbbear]

`Can't find Hardysolar's diesel injector tester. Will you give me the specific link?
thank you,
charlie

[neepsjeeps]

Its on the left side of the home page hardysolar.com or the link is
http://www.hardysolar.com/shop/product.php?productid=17430&cat=0&bestseller=Y

These come with the Chinese made generators they sell and you can either convert the mpa or swap it out with a psi gauge (thats what ill do)

[bbbear]

how do you know how much to shim? and do the shims come in a pack of various sizes?

The nozzle in each injector protrudes a bit beyond the rim of the injector. That protrusion indicates the amount of load on the nozzle. The load is provided by the internal injector spring. The amount of the load is determined by the number and sizes of the shims on top of the spring. All of my injector nozzles, save one, protruded the same amount.. thus indicating to me that, with the exception of the one nozzle, they had about the same load.

I had a pro add a shim to that one nozzle until it matched the others. He then pop tested it and commented on the excellent spray pattern. In retrospect, I should have had all of the injectors pop tested, but I didn't know any better. :confused:

Still, it worked out find, because that old car is still running beautifully... and it now has 323, 300 odd miles on the OD....

[bbbear]

Its on the left side of the home page hardysolar.com or the link is
http://www.hardysolar.com/shop/product.php?productid=17430&cat=0&bestseller=Y

These come with the Chinese made generators they sell and you can either convert the mpa or swap it out with a psi gauge (thats what ill do)

Thank You! It looks quiet "hardy". :D