Lingenfelter 4 in Stroke Crankshaft Clearance Guide v2.0 - Manual (Page 4)

Page 3
Step 2
: This clearancing is required on all GM vehicles.
: Install the oil pump pick up onto the engine. You will notice that there is a gap
between the windage tray and the backside of the oil pickup. The pickup support needs to
be bent so that the backside of the pickup is either touching or nearly touching the windage
tray.
: The areas you need to bend the pickup support are indicated by black circles as
shown in figures 4 and 5.
Figure 4 Figure 5
: This should provide adaquate clearance between the bottom of the pickup and the
oil pan. This can be verified by placing a piece of clay on the bottom of the pickup and
installing the oil pan without any gaskets. This will crush the clay allowing you to mea-
sure the clay and verify the clearance between the pickup and oil pan. Clearance should be
around 0.350in.
: Once clearance is verified, torque the oil pump pickup support retaining nuts to 106
lb-in.