Diesel Timing

4020guy · May 26, 2013

Can too far advanced timing cause overheating in a diesel? Had the pump off my 190XT when I overhauled it. Runs and starts fine but seems to be running a tad warm. Installed a new mechanical gauge and used the digital thermo gun and both seem close. Has a new water pump but notice the pulley is worn abit. The gauge on the front cover is gone so static timing is kinda hard so I marked the pump before R&R. Any thoughts?.....Ron

Goose · May 26, 2013

Haven't had experience with a 190, but on my D-19 diesel the timing is so critical if the timing is off just a tad it runs so rough you don't get around to noticing engine temp.

David G · May 26, 2013

That will tend to do the opposite.

Dieseltech · May 26, 2013

More likely your timing is retarded if it starts good as most were not great starters, this will cause more heat on exhaust stroke. Stock is 26 degrees BTDC on 190. AC 200 had advance to help with starting that 190 did not have.

T in NE · May 27, 2013

Advancing the timing will make it start better and give it more power at high revs, retarding the timing will make it start harder and take power off the top end.

Dieseltech · May 27, 2013

Direct injection diesels start best with timing retarded, then run best with some advance added as speed is increased. Original JD 3010, 4010 tractors were fixed timing, no advance pumps. Later 3020, 4020 had advance of 5 degrees pump, 10 degrees engine for much better starting and to stop any chance of high speed no load miss. AC made the advance change on 200 for the same reason. If fuel is injected too early there is not enough compression heat to start burning fuel. Later helps starting, but may have no load high speed miss. That's where the advance helps with both starting and running.

Diesel Timing

4020guy

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Goose

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David G

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Dieseltech

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T in NE

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Dieseltech

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