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Does anybody have an oil flow diagram for the 2.5 944 engine?
Ie a diagram that illustrates the oil path, sump - pick up - pump - etc etc.
I am still unsure of the order of things. As far as I can gather it is:
Sump
Pick up
Pump
Relief valve
But then after that I'm not sure. After the relief valve does it go straight to filter? Am I right in thinking that the oil comes into the filter on the OUTSIDE, filters through and exits through the MIDDLE (ie down the threaded tube)? OR, does it pass through the oil cooler matrix before the filter?
I'm asking as I still have a problem with no oil pressure. I have the sump off and have had the pump off also. With the pump reinstalled and an oil reservoir submerging the oil pick up pipe I can crank the engine but get nothing coming from the OPRV hole (valve removed). I have also cranked with valve in position and have managed to get a tiny, tiny flow coming up to the filter base (coming up the outside hole). This flow is REALLY small. If the valve was a problem then I would expect that with it removed I would get oil coming from its hole.
If I pour oil down the middle filter hole I get oil appearing at the main bearings hence I became reasonably sure that the oil flows this way during operation. My next step is to modify an old filter, bung the middle hole and pressurize the outer part - thus air bubbles should be seen in the oil reservoir around the pick up pipe. This should enable me to detect any leaks around the pick-up. If there are no leaks then I can only assume the pump is buggered.
Any thoughts or a flow diagram would be great. Cheers.
