Re: can i turn over a packard motor with diesel instead of oil to clean out oil passages?

Posted by Owen_Dyneto On 2015/9/22 10:28:09

My strong preference would be to reserve the use of flushing oils until after blockages and crud have been removed as much as possible by mechanical means. Just too much risk of sludge/crud moving around to other locations, circulating thru the bearings, etc. After that what you might consider (without turning the engine over other than a partial turn by hand) is to pressurize a container of flushing oil with compressed air and use it at all the external entries to the oil galleries that you can get at, flushing in both directions where practical. When you think you've got everything cleaned, again use a compressed air pressurized container of motor oil and feed it thru the main oil feed inlet on the block and try with the valve covers and pan removed to see if everything is now receiving oil. I realize this will be a lot more tedious than what you hoped for but I think it's the safest way and most likely to succeed.