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#1
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617 300D Injector Test with a Screwdriver?
So, a mechanic was working on a friends car and put a screw drive on the injector (of her 300sdl) and put the plastic end up to his ear.
She tells me that he was able to diagnose 3 "bad" injectors this way. My question is what was he hearing and does this trick actually work. I would love to do this with my 300d to check and see if I should replace the injectors (without going to the trouble of popping them out and pop testing them). Any thoughts on what to listen for?
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Thanks, Will 1985 300D- 222k- (bad transmission) 1980 300D- (parts car) 1982 300SD- 242k |
#2
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This is the same as using an engine stethoscope; just listen for the sound of the injector popping open. If you have an injector that is not working properly you will be able to hear the difference; all the others will sound pretty well the same.
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'98 E300 DT '87 190D 2.5 turbo RIP '92 S500 Sold '03 3.2TL-S A-Spec |
#3
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I used a cheap stethoscope from Harbor Freight to listen to my valves after an adjustment. At least I thought I was listening to the valves, I put the tip on each of the injectors.
I didn't really know what I was hoping to hear, but all cylinders sounded similar, so I thought that was good. |
#4
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If you listen carefully you can hear the sound of the injectors separate from all the other clanking without any instruments.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
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