Timing chain was cut recently and car came to a halt.Engine oil light was on inspite of the fact that engine oil was present in the system. Timing chain has been replaced, engine has been flushed and new engine oil filled.
The engine oil light is still showing on the dash board when the engine is running.
Most important thing you need to do is to establish the actual oil pressure. put a mechanical gauge on the engine and read real oil pressure. If pressure is low (min is 15psi, I prefer to see at least 20 at idle) there is an internal problem...bearings etc. If pressure is good, sending unit has failed...replace it. I would not drive it 'till the oil pressure is verified as being safe. You might get lucky and someone just forgot to plug in the sending unit, but it must be checked!!!
good luck
The oil light does not indicate a low oil level, it indicates that there is low oil pressure in the system. Since it hardly takes any pressure to activate the switch, the light should turn off almost as you crank, before the engine starts.
If the light remains on, check that the oil pressure sending unit is intact and the associated wires installed correctly. Replace sending unit with one known to be good. If problem persists, replace sending unit with pressure gauge and start engine to check for system pressure. If no pressure is detected, refer vehicle to qualified service personnel for further diagnosis.
Problems which prevent oil pressure include, but are not limited to:
Failed oil pump
Scored/spun bearings
Set the timing mark of the timing chain . even though its been replace you still have to set the timing mark of the timing chain for the engine to run good . May be that is the reason why dash board light is still on while running , don' t worry about the dash board its not grounded.
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