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

Posted by Larry51 On 2015/9/22 8:52:53

Doing a clean-out with diesel probably wouldn't get a severe build-up of rubbish out of the oil-ways. Then you are also left with diesel in the system, which might be a pain to clear out. There are very light flushing oils available instead that you could use.

But you could possibly also do damage to the cylinder bores / big end bearings etc if any grit has made its way into the engine. How long since the engine ran?

If you are unsure of what's going on inside then suggest that you check how much sediment and rubbish is in the sump. If there's a lot of build-up there, then the oil pickup might be blocked, and that will mean dropping the sump (oil pan) to give it a good clean.