Re: Oil Pressure & restart after oil pump overhall

Posted by 32model901 On 2011/2/13 13:57:58

Tom,

I'm most familiar with the 8's vs. 12's but I can offer a few suggestions:

I always run a repaired pump before putting it back on the car. I have a pressure gauge attached to the pump output and have the pump in a can of oil. I run the pump up to 1000 - 1500 rpm (1/2 engine speed)and adjust the pressure relief (if it's on the pump).

If you pressure relief valve isn't on the pump I've check the valve spring, plunger / and or ball for wear.

The low pressure reading could be caused by the pump, fault gauge, improperly adjusted pressure relief valve or worn bearings.

If you can borrow a mechanical gauge check it against the dash gauge to make sure you have an accurate reading.

Before starting you may want to pull the plugs and spin the engine over to make sure you have oil pressure before starting it.

On some modern cars you can make a tool to go down to the pump and spin it with a drill to prime the system before starting. On the pre-war 8's the pump gear is below the camshaft so pulling the distributor to spin the pump shaft will not work.

Regards,

Dave