Re: Oil Pressure and...

Posted by BigKev On 2009/6/28 16:58:40

How is your Oil Filter plumbed? Have you checked the filter?

On the 51-54s the oil is picked up and delivered to the main gallery, then it exits out of the drivers side of the block where the oil sender is. Depending on how the oil filter is plumbed it works one of two ways:


Bypass Mode:
It leaves the side of the block via a 3 way Tee, there is a short pig tail that then connects back to the block a few inches about the outlet. This return inlet then feeds the upper end of the motor (valve-train).

The other side of the tee feeds over to the filter, and then drains back into the oil pan via and inlet below the filter. There should be some kind of restrictor in one of the filter fittings so the the valve train feed gets adequate pressure.

Non-By pass:

It leaves the side of the block via a 2 way Tee, which feeds over to the filter, and then from the oil filter connects back to the block inlet to feed the valve train. If the filter becomes clogged, or the line gets kinked, then you could starve the upper end of the motor.