Detroit Diesel 3-53 would not stop after air intake closed? WTF?

Jun 21, 2011 48 Replies

Oh, yes, if you are not a DD devotee, they sound WAYYY different from conventional 4-stroke Diesels. The Roots blower is an integral part of the engine, and has a distinctive and high sound. The engine is running twice as many power strokes as a 4-stroke, and thus sounds twice as fast. So, full power at near rated RPM sounds to the unexperienced to be an engine well into a runaway when it is just running fine. (Your neighbors are just going to LOVE you.....)

Jon

I believe that the spring loaded rack system was made as a substitute for the inlet damper which DD recommended be disconnected. However engines used in the oil industry are still required to have inlet air damper type shutdowns. Cheers,

John B.

I have both the rack and air damper.

The cause of my trouble was that one injector was stuck and the rack could not pull the arms out of the injectors.

i

I am now a DD devotee. It is a very beautiful engine. I always had a love for diesel engines in general.

If I had a farm or a lot of room, I would keep the DD and would make it do something. I would pay to have it rebuilt.

i

Is it new enough to be an aluminum block? If so go find a mid 70's GMC P/U and install it. Would make a great hauler.

Nope Iggie, you had an old Jimmy. You rack was the old style that could stay partially open if an injector stuck. Later versions called a single screw" will shot off all the injectors except the one that sticks Cheers,

John B.

A lot of errors - hmmm must be my spelling checker. It should have read "called for a "single screw" will shut off".

Cheers,

John B.

I've seen them installed in F100 FORD P/U trucks too. Then there was an F350 with a 6-71 in it.

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