I was talking to a guy who used to work at oilchangers. He said they pump 75 litres of solvent through the engines when they clean them. I had an idea. On one of my cars the sump is really dirty and I'm pressed for time and money and need to get the car going by next Friday and moved off the property (along with all my other broken cars) so I can have a party in the backyard. Would it be fine if I poured some sort of solvent, probably petrol into the sump and turned it over by hand a couple of times to clean the inside? Or will it do something to the engine that is pretty negative?
I would pull sump off and clean it all and the block etc but I don't have time to do that and I would run oil through it until its clear but I don't have the money for oil so this was my next idea.