06-11-2017, 03:20 PM
I am in the process of recommissioning an RP that has stood for 30+ years.
About a year ago the previous owner filled the rad with water in order to run the engine. Unfortunately he didn't remember that the cylinder head was not screwed down and so ended up with water in the bore/sump. He says he drained the rad and the sump.
When I acquired the car it was a non-starter but it is now running well. It has a new head gasket. The rad level stays constant.
However...
On starting from cold and at fairly high revs there is about 7lbs max indicated oil pressure. On any other 7 I'd expect to see it 'off the scale' on a 10lbs gauge or 20lbs+ on a longer scale gauge.
After a few minutes running, when I pull the dipstick I find the oil is 'frothy', as show in the photo. It returns to a non-frothy state not long after switch off.
Is this caused by a worn oil pump cavitating the oil?
About a year ago the previous owner filled the rad with water in order to run the engine. Unfortunately he didn't remember that the cylinder head was not screwed down and so ended up with water in the bore/sump. He says he drained the rad and the sump.
When I acquired the car it was a non-starter but it is now running well. It has a new head gasket. The rad level stays constant.
However...
On starting from cold and at fairly high revs there is about 7lbs max indicated oil pressure. On any other 7 I'd expect to see it 'off the scale' on a 10lbs gauge or 20lbs+ on a longer scale gauge.
After a few minutes running, when I pull the dipstick I find the oil is 'frothy', as show in the photo. It returns to a non-frothy state not long after switch off.
Is this caused by a worn oil pump cavitating the oil?