How well do ultrasonic cleaners work on injectors? Any particular Freq. or sonic power level.

I have 2 at home and we use several at work they're pretty awsome not sure the output or frq. but there's some targeted solvents u can use that help

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2004 Infiniti G35 3.5L 6mt Coupe 73K miles 25.6mpg ytd
2001 Green Audi TT 225 AWD Roadster 71K 6sp 30.9mpg >>STOLEN<<
1982 300D Turbo 231K 120hp? 28.1mpg YTD

What are you using as the cleaner/solovent for yours.

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84 300D, 82 Volvo 244Gl Diesel

Can't the solivent catch fire if you use the wrong type?

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

yes

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!

You can reduce the risk from solvent fires by using non-flammable solvents and by creating a "double boiler" with water in the ultrasonic cleaner and a secondary container with the cleaning solvent and parts.

Pure biodiesel (B100) might be a good cleaner; it certainly cleans the other parts of the fuel system.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

They make special cleaners for Ultrasonic cleaners; some of them are powders that you disolve in water. However, I do not remember the names of any.

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84 300D, 82 Volvo 244Gl Diesel