VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => IDI Engine => Topic started by: Digital K on May 22, 2011, 01:56:07 pm

Title: aaz injector nozzle question
Post by: Digital K on May 22, 2011, 01:56:07 pm: I dropped my injectors off at the local diesel place for a rebuild. he couldnt find the nozzles so he "cleaned everything up the best he could". When I put everything back together I had a major knock on one cylinder. It happened one or two times and never happened again.

fast forward about 2 months... and I found the nozzles. is it possible for me to just swap the new nozzles on without calibration? Im assuming the guy didnt do any lapping, he charged me 40$ I think for the "cleanup" of the nozzles. Im not sure what he all did. Currently the truck idles flawlessly. I just wanted to put new nozzles on because the entire motor was trash when I bought it. Everything has been rebuilt, I figured new nozzles would be good? Can I just swap the nozzles on without lapping and rock and roll? Do they need to be calibrated? Should I just take them in and have them redone completely?

thanks!
Title: Re: aaz injector nozzle question
Post by: Mark(The Miser)UK on May 22, 2011, 04:30:50 pm: If the engine is running well, then don't change the nozzles for the sake of it. :o

Chances are that new nozzles won't end up as well balanced as they wear in, and will need tinkering with. Ratio of presquirt to main should remain unaltered though I suspect.

Keep them for when you have problems of smoke at idle or other. [IMO]
Title: Re: aaz injector nozzle question
Post by: Digital K on May 22, 2011, 10:45:12 pm: well, I saw the spray pattern when they were out, and it was terrible....
Title: Re: aaz injector nozzle question
Post by: Mark(The Miser)UK on May 23, 2011, 04:13:05 am: Quote from: Digital K on May 22, 2011, 10:45:12 pm
well, I saw the spray pattern when they were out, and it was terrible....
I see. Were you pumping fast enough, according to Bosch 'instructions' [just checking] ;D

I'd certainly give them a quick clean and reassemble, test and then 'give in'

I don't have much experience of 'new' nozzles, but the 4 recently purchased, and sealed in jelly; new 'old stock' were not the panacea I was hoping for; whilst 'recovered' nozzles that are well used and settled have been great ::)
Title: Re: aaz injector nozzle question
Post by: Digital K on May 30, 2011, 10:33:27 pm: these seem pretty clean. maybe now that the truck is down for a few days, I'll install the nozzles, and just see how it is.