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Old 05-31-2016, 12:20 PM
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Thanks to picking Smokin Dodges brain at the Get to gether I decided to try do a tuneup on the diesel motor in my Michigan End Loader. I failed to get the injectors adjusted right when I had the head and valves remachined about 10 years ago and it has never quite run right since. Would not idle, and to keep it running I would have to be about 1/4 throttle. It was really getting worse as time went on and it finally quit unless full throttle a month ago. I changed the fuel filters, and that did not help. So I decided to check the injectors push rod tolerances. Took about half a dozen times reading thru the manual to understand it, but I was able to get the motor to idle like it is supposed to! Here is a link to a video of it idling. http://youtu.be/Z5dwWC6u90k Here is a video link to using the Starretehttp://youtu.be/RQLl2PnB2gw RPM gauge. I figured out the alternator rpms at what the manual called for the engine to idle between 500-600 rpms and calibrated off of the alternator. I timed 15 seconds and then multiplied the Guage X 4 to get the engine rpms. I think this is the first time I used this Guage. Brian
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Last edited by toprecycler; 05-31-2016 at 04:58 PM.
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Old 05-31-2016, 12:26 PM
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Your 2nd video is private.


Dt
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Old 05-31-2016, 02:27 PM
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Your 2nd video is private. Dt
try it now! Sorry about that. Still new at this.

Brian
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Old 05-31-2016, 10:05 PM
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It doesn't sound as though the injectors are timed correctly. Sounds as though one is working harder than the rest.
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Old 05-31-2016, 10:32 PM
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It doesn't sound as though the injectors are timed correctly. Sounds as though one is working harder than the rest.
Could that be why it smokes still? I used it quite a bit tonight pulling a stump out and then grading the driveway. I was happy that it would stay running while I got on and off the machine. I guess it has been quite a long time since I heard a good Detroit run, it still might need some more tuning. Thanks for you input.

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Old 05-31-2016, 10:34 PM
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Glad to see the ol girls got some life left. The idle sounds fast or high but who am I to argue with a starret measuring device.

It does sound like it had a bit of knock to it but with the valve cover off and using a phone to record It's tough sometimes to capture it all. It sounds pretty dang similar the the first 25 seconds of this clip: https://m.youtube.com/watch?v=XG2z5PJhaI4

The other thing to remember is it's an odd cylinder engine.

Keep up the good work Brian!

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Old 06-01-2016, 10:22 AM
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For some reason injector timing is more obvious on Driptroits at slow RPMs. Plunger height and rack setting makes a difference. They aren't timed like a inline or rotary injection.
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Old 06-01-2016, 01:10 PM
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For some reason injector timing is more obvious on Driptroits at slow RPMs. Plunger height and rack setting makes a difference. They aren't timed like a inline or rotary injection.
I only checked and adjusted the plunger height. I thought about adjusting the rack settings, but thought it has been running, why mess with that. I probably should check that too, since I have checked everything else. It does seem a little sluggest when under load to rev up. Do you guys think that it shouldn't smoke at idle?

Brian
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Old 06-01-2016, 03:36 PM
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Once the engine is up to temperature there should be almost no smoke. There will be some on acceleration. Detroits don't take lugging very well. I've seen pistons with the sides burned away and sleeves cracked at the intake ports. They love being right on the top of the governor. Your ears and the neighbors might not like it, but the engine will be happy. Make sure that the injectors are not over-sized. Too much fuel will destroy a Detroit. Some folks think they can get more HP with bigger injectors, it doesn't quite work that way.
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Old 06-01-2016, 07:08 PM
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Detroits don't take lugging very well. I've seen pistons with the sides burned away and sleeves cracked at the intake ports. They love being right on the top of the governor. Your ears and the neighbors might not like it, but the engine will be happy.
Best description I ever heard for running a Detroit was "Drive it like you just slammed your fingers in the door"
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