Well there's nothing wrong with the oil pump or oil pressure relief valve.That tiny amount of wear would have neglible effect.
Like others have said you really need to fit a temporary gauge. This would allow you to see if there's actually a problem with the oil pressure or if it's an indication problem.
If it turns out to be an actual oil pressure problem there are a few things worth checking. Firstly check there's nothing restricting the oil pick up in the sump. You also need to check there's no way air is being drawn in between the pickup and pump suction eg if the pickup was loose , secondly it would be worth checking/replacing the oil filter in case it's failed internally and thus causing a restriction.
Other than that an internal leak after the pump but before the location of the oil pressure sender is a slim possibility . I'm not familiar with the oil galleries in the m96 engine so don't know if there are any plugs for example which could pop out causing an internal leak but would say it's very unlikely!
HTH Mac
Like others have said you really need to fit a temporary gauge. This would allow you to see if there's actually a problem with the oil pressure or if it's an indication problem.
If it turns out to be an actual oil pressure problem there are a few things worth checking. Firstly check there's nothing restricting the oil pick up in the sump. You also need to check there's no way air is being drawn in between the pickup and pump suction eg if the pickup was loose , secondly it would be worth checking/replacing the oil filter in case it's failed internally and thus causing a restriction.
Other than that an internal leak after the pump but before the location of the oil pressure sender is a slim possibility . I'm not familiar with the oil galleries in the m96 engine so don't know if there are any plugs for example which could pop out causing an internal leak but would say it's very unlikely!
HTH Mac
