(Home) Low oil pressure

i have a toyota estima emina 2.2lt diesel motor with no oil pressure this all happened after oil change and new filter i rang local filter manafacturer and they confirmed that i have used the correct filter i have put a pressure gauge on an it has no oil pressure at all the motor runs ok with no knock hope someone can help - (#2467) Darryn, 8 Mar 02

Are both oil tanks filled as per procedure? - (#2468) David miller, 9 Mar 02

Thanks for fast reply yes both tanks are filled to correct level - (#2470) Darryn, 9 Mar 02

Other than an airlock or duff filter, nothing springs to mind... - (#2475) david miller, 9 Mar 02

David how do you clear an air lock from the system? I have tried another filter but still no pressure. Is the oil pump internal or external if external is there a way to check that it is driving?
Thanks
Darryn - (#2482) Darryn, 9 Mar 02

Are you sure there's NO oil pressure? Does the top of the engine look wet when running. The pump is behind the crank pulley, BTW.
I suppose the pressure relief valve could have failed open... - (#2488) david miller, 10 Mar 02

hi
could be pump cavitating can you pre fill filter rover v8 was swine for this had to pre fill through oil pressure switch hole with hand
pump (CYCLE) pump cant lift oil through wear
but after priming usually ok
david - (#2511) david, 11 Mar 02