I am extremely surprised at the total lack of understanding of the folks in this thread.
-westy- said:
well the engine was sat upside down for a good 15 mins..
Let me restate that myself :
THE ENGINE SAT UPSIDE DOWN FOR 15 MINUTES!!!
The engine has hydraulicised. What this means is that while the engine was positioned in the upside down position, all the oil in the sump was dumped into the cylinders.
What is causing the engine not to turn over is the fact that you have punched the compression ratio up to about 500:1 due to all the oil on top of the pistons.
If you DO actually get it to turn over, there will be no amount of money or technology in the world will make it run again.
The one and only way to fix it is to take ALL of the spark plugs out of the engine and turn it over for 30 seconds at a time with a 5 minute rest time (to let the starter cool) in between for about a total of 30 times. Then pour some VERY thin fluid (naptha gas of mineral spirits will work) in each and every one of the spark plug holes (to dilute any remaining oil) and then repeat the turn-over/rest sequence again.
Of course it goes without saying that safety is paramount and the fact that you'll be spraying VERY volitile fluids in a gaseous form all around the engine bay means NO SMOKING. And to be sure, pulling the fuse from the ignition coil is mandatory.
Once you have done that, drain the sump, change the oil, drain and change the coolant, then put NEW spark plugs back in (as the old ones will be permenantly fouled with oil) and THEN try starting it.
Any further attempts to start the car before doing what I detailed above will only result in multiple holes being punched in ALL of the pistons to relieve the pressure. We're talking about THOUSANDS of PSI here. If you're LUCKY, you'll blow the ceramic insulators apart on your spark plugs (putting them clean right through your bonnet like a gunshot) to relieve the pressure. If not, it'll be your pistons that'll go.
DO NOT ATTEMPT TO TURN THE ENGINE OVER ANYMORE!!!
Not until you're got that oil out of the cylinders, anyways.........