This is how I kept myself, and my stall clean when working on 617's.

If tearing down a running 617 for a rebuild, follow these steps before removal/teardown.

Drain the oil, oil cooler and filter housing as you normally would. Install a new oil filter. Fill the crankcase with diesel fuel and allow the engine to idle for 10-15 minutes.

Drain all aforementioned areas and remove engine according to FSM.

You will now be working on a very clean engine, instead of looking like a chimneysweep.

Hope this helps....Robert

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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Correct me if I'm wrong, but shouldn't this be done on all engines for good measure?

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- 1979 W123 240D 4-speed, 390k miles

Idle on diesel,I would just turn with starter,I have done this to a Ford with clogged oil screen and worked.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran