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Old 12-29-2006, 04:15 PM
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Originally Posted by dannym View Post
That's another problem with the Bosio nozzles. Everyone raves about them but they HAVE NOT stood up to the test of time.

This is true. I will keep everyone updated on how they work out.
1981 300 SD 213k miles "Stock for now"
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Old 12-29-2006, 06:55 PM
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Originally Posted by Hit Man X View Post
Was that $10/per injector or $50/per injector?

I don't have a problem rebuilding with new nozzles and paying someone to pop them only for me.
$50 for all 5, cleaned and popped. They tested fine after cleaning and were in spec when popped so no rebuild needed.... RT
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Old 12-30-2006, 05:09 PM
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you can buy a pop tester on ebay

for about 200 bucks there is seller on ebay for tham, but not worth it you can take to bosch service centre and most dont charge for pop test!
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Old 12-30-2006, 05:24 PM
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Thumbs up

Originally Posted by rwthomas1 View Post
$50 for all 5, cleaned and popped. They tested fine after cleaning and were in spec when popped so no rebuild needed.... RT

Hey, that's not bad at all.
I'm not a doctor, but I'll have a look.

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Old 01-05-2007, 12:49 AM
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Put the Bosios into my NA 1980 300CD tonight. Nailing like mad on #4 where it didn't before. seems quite rough at idle and not much power. That major nailing gets me. She was a pretty good runner before--just thought the Bosios would be better--had originals in her for 250000 or more. Had done IP timing some time ago. It shouldn't have all gone to pot in the hour it took to do the swap. What the heck am I missing??????????????????????? Original nozzles looked pretty good too, not all crapped up like some shown.

Last edited by gs sparhawk; 01-05-2007 at 12:55 AM.
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Old 01-07-2007, 01:08 PM
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Check the part numbers carefully as I said earlier in this thread. I had some nailing with the Bosio knozzles for the first couple of hundred miles. I just put in a new set of Bosch knozzles in yesterday. I have no nailing, smooth idle, smooth power band and it seams quieter than before. Make sure you use new heat shield washers each time. They are a crush type washer that should not be reused. Chances are you did not need to replace your knozzles. I'll be taking it for a longer ride today with the new bosch knozzles just cause it's a nice day, cold but nice.

Good luck
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Old 01-07-2007, 05:26 PM
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Thanks for the suggestion. I
ll check them out carefully. Yes, it is possible I could have gotten away with a service tech cleaning and pattern check.

I hope there is a good explaination for the difference--and why do some seem to be having the nailing problem?? Better ignition characteristics or earlier popping-off???

BTW, a query to Diesel Giant hasn't had a reply yet in a few days. will this be a problem?


Last edited by gs sparhawk; 01-07-2007 at 05:28 PM. Reason: additional question
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Old 01-08-2007, 01:02 PM
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In the early morning hours I often wake up with a dozen ideas going around in my head--one of them was that a speck of dirt would keep the injector pin from closing properly and when the pressure came up from the IP it would spray prematurely causing nailing. Then, afterward it would continue to dribble---like some of us older guys----and cause the smoke. time to go back into #4 and see what we see. I dearly hope it WAS just a piece of junk of some sort--clean it and problem solved.

Thanks for all the info read in this and other postings.

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Old 01-10-2007, 08:14 PM
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Update. I gave a call to Russ before takeing the bad injector out. He said he'd bet that a pin under the spring got reversed. I checked it out and sure enough, that was it. The whole body was full of black goop---carbon etc. The needle was stuck and it took a bit of cleaning. I'd guess that with no resistance on the needle, the cylinder compression was pushing fuel and crap back up into the injector body. No wonder it was smoking.
Back together, everything is rosy. NO smoke and even combustion except for a lope that I think is valve adjustment. I probably could have gotten away with a cleaning and check of the old ones but I may get a bit more mileage with a better spray pattern and that will be worth something. Timing is in order also and with a tweak here and there it may surprise me.

Thanks for the comments.

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