Recommended Procedure - E-Series:

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Do not plug hole on Crankcase Pressure Test Adapter 303-758.

Make sure the engine is at operating temperature. A cold engine will give higher readings. Remove the air cleaner assembly. Remove the ducting to the turbocharger inlet pipe. Remove the inlet pipe and elbow that connects to the breather box. For additional information, Refer to the appropriate ENGINE article . Block the outlet at the valve cover with the cap provided in Pressure Test Adapter Kit 014-00761 or equivalent. Install a protective screen over the turbocharger inlet.

CAUTION: Excessive screw clamp torque may damage the oil fill tube.

Install the Crankcase Pressure Test Adapter 303-758 to the oil fill tube using an appropriate diameter hose and secure with screw clamps. Start by connecting one end of the hose to the knurled surface of Crankcase Pressure Test Adapter 303-758 and the opposite end of the hose to the oil fill tube and secure with screw clamps.

Plumb to the Magnehelic® gauge in the gauge block. Make sure the Magnehelic® gauge has been zeroed.

Start the engine and operate at 3,000 RPM. Hold for 30 seconds minimum and take a stabilized reading. Do not block the hole at the top of the restrictor tool.