2009 non turbo will not start;
Started with a severe overheating event with the white smoke, oil and anti-freeze covering the engine compartment. Engine was running when driver was able to get to an off ramp on I-20.
Was towed to a Mini dealer who tried to start it, but cranked with no thought of firing.
Towed car home and discovered compression test showed (1) 80 lbs.,(2) 40 lbs., (3) 20 lbs., (4) 90 lbs.
Tore the top of engine down: Head was warped between cyls 2 and 3, by 9 thousands of an inch. Machine shop did their thing. New head gasket,new water pipe and thermostat housing, all the required new bolts,
Timing chain looked good and all was reassembled with lube etc. Timing was right on. Engine turned over with a wrench with no problems.
Put in a new battery and the engine displayed the exact same compression and no start. Fuel present in the spark plug holes. Spark plugs firing. Not a pop even with starter fluid.
Any help with this would be greatly appreciated.

 

Do a leak-down test to find out where the compression is going. "Machine shop did their thing." doesn't tell us much --- valve grind / seats, test for cracks, anything besides level it? Inspect the block for cracks between 2 & 3? Getting any codes?

 

Thanks for the quick followup. The machine shop leveled it.

 

If the head was warped that much it is very likely that the block is damaged. I don't have any direct experience with N1x blocks, but BMW M5x blocks (used in '90s and later BMWs) were fairly intolerant of overheating. That said, Prince engines may use a better alloy.

What OBW said: Do the leak-down test. If the block fails the test, consider if the car is worth putting money into, if so, replace the motor with a used one. I would avoid rebuilding a severely toasted block, even if not cracked or warped.

If the machine shop leveled the deck without straightening it first, then the cam journals are out of alignment by 0.009".