Check out this link. Does this Aussie have something or does he just like to listen to himself?!?

http://www.interject.com.au/ULTRASND.HTM

 

Looks to me like he likes to do something else.... like abuse himself.

 

I don't know if his "evidence" would stand up in court, but the basic premise is sound - don't put injectors into ultrasonic cleaners.

I've seen thousands of dollars worth of aerospace components ruined in an ultrasonic bath. Precision components that had their fatigue life used up in about a minute.

 

I use an ultrasonic cleaner for aerospace parts at work and your right, five7kid, if left in to long, it does tear 'em up. It'll flat break down the molecular structure. I guess the conclusion one might draw is what is the experience of the operator and how good is the fixturing. I would have more confidence in the company if they flowed and matched the units after cleaning. What is the alternative? Just purchasing new injectors?

 

Exactly!!!!

There's too much griping about what's wrong with it and not enough (any) "here's the right thing to do". Of course with delicate things like injectors, I wouldn't want to subject them to the harsh rigors of ultrasonic cleaning, considering that they're designed for and normally operated in such a vibration-free, absolutely clean, temperature-controlled environment.

Liek I said, as far as I could see, the guy was just choking the chicken, and has little useful to offer to the world at large.

 

...More like spanking the monkey.

I read that article about a year or more ago. I've got quite a few miles on cleaned injectors, and none of them have been "ultra-sounded" to death yet.

I understand the theories and philosophies of fatigue in some structures. Some things aren't designed to tolerate that, like airframes and many lightweight or high-precision components. Jeweled bearings in many instruments are shattered and ruined by ultrasound at the corect frequency and amplitude. Heck, many airframes don't even tolerate normal pressure cycling very well.

However, wWelded joints in deuterium and steam pipe for nuclear reactors used to REQUIRE ultrasonic inspection. Considering that infrared inspection is a newer method, and most nuclear generating stations were built long before its adoptation, it's a safe bet that all welded joints in pressure vessels and plumbing in all working U.S. reactors were ultrasonically tested. Heard of any failures lately? It's not like they'd be easy to hide...

RB is right. Injectors aren't in reality "precision" devices, and are actually fairly loose in tolerances and relatively crude assemblies. A Pegasus or Moog hyrdaulic servovalve is a much more precision device, and the accepted method for cleaning is - you guessed it - ultrasound.

Maybe that works a litte differently "down under", where the sonic waves would approach the device from a completely different angle. Of course, no offence to our mates down under, but this one guy is maybe just a little off-base. He may be just goofy enough to be a San Bernardino or Valley resident. Wanna trade?

That kind of statement is tantamount to saying "Never pour ATF in your engine oil." Of course, you would not do that under normal circumstances - in a perfect world. But in a perfect world, engine oil sumps (and fuel injectors) would never get dirty in the first place. When they do, we have to deal with them in the most reliable, econmically feasible manner.

 

Um, if you follow the links to that guy's other pages - he sells 'secret' Injector cleaning equipment & chemicals:
http://www.interject.com.au/machine.htm

That might be the explanation for his 'infomercial' on ultrasonic cleaning, IMHO.

 

And no offense to our people in SoCal, but you've got to admit, there are a few strange birds flocking around there. I've seen one or two there myself that are worth a chuckle or two. Then again, I can't even spell "corect" correctly...

Yeah, that system looks suspiciously like the on-car cleaners that have been available from OTC and other manufacturers for years now. I had my first set of injectors on the TA cleaned that way. After that didn't work, I then sent them the Cruzin' Performance to get cleaned correctly . The sad part was that the on-car cleaning was almost twice as expensive, and ultimately, infinitely more expensive since it did me no good whatsoever. I haven't even bothered considering that kind of on-car "service" since, and only send them off for a thorough job.

 

Are you implying that all the stuff I read on the Web might not be true?? (gasp!) Oh, the horror! Shame on you.

 

I know I'm going way out on a limb with that one, but I guess that's what I'm saying...