colin.braiding@jcu.edu.au

Thanks for your reply Neural revolt, it is at 178000K. It has not had a replacement oil pump previously. It holds pressure until it is warmed up and then drops very low.I appreciate you taking the time. I think your last comment hit the case and point. The bearings are probably worn and the engine cant hold the resistance to the flow to maintain pressure.

A little help please? I have a Corolla Ascent 2007 and the oil light keeps coming on. over the past few weeks I have changed the fuel filter, oil. pressure switch, tested with a mechanical oil pressure tester ( pressure briefly okay and then drops after a minute) ran diesel to flush the engine, cleaned out the oil pan and oil pump pick up screen thoroughly, dismantled and cleaned the valve cover, replaced the oil screen filter under the cam cap, tested and checked al the VVT components, cleaned all the oil valves and other components, removed sludge, unblocked oil passage channels , put new gaskets and O ring in the VVT gear in the valve cover. What else is there guys? The car is older but has never been thrashed or overworked. It did have a fair bit of sludge in the valve cover and I got most of it much cleaner than it was. Do the Oil Pumps go often in this model? Is the engine just worn out and the bearings and other parts just not providing the resistance to bring up the pressure? I am stumped at this point and have gone through the Haynes workshop manual suggestions. I have reviewed some online suggestions but feel that I should check in with you guys for help. suggestions please..