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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (Engine - 4.9L 6-CYL - VIN [Y]) >> Engine Specifications >> Pistons Piston Pins & Piston Rings Specifications

Pistons Piston Pins & Piston Rings Specifications

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PISTONS PINS & RINGS

Application In. (mm)
Piston
Clearance .0010-.0018 (.025-.046)
Diameter (1)
Red Piston 3.9982-3.9988 (101.554-101.570)
Blue Piston 3.9994-4.0000 (101.585-101.600)
Yellow Piston 4.0008-4.0014 (101.620-101.636)
Pins
Diameter
Standard .9749-.9754 (24.762-24.775)
.001" (.03 mm) Oversize .9760-.9763 (24.790-24.798)
.002" (.05 mm) Oversize .9770-.9773 (24.816-24.823)
Piston Fit
Under 8500 Lbs. GVW .00029-.0005 (.007-.013)
Over 8500 Lbs. GVW .0003-.0005 (.008-.013)
Rings
No. 1
End Gap .010-.020 (.25-.51)
Side Clearance
Standard .0019-.0036 (.048-.091)
Wear Limit .0056 (.142)
No. 2
End Gap .010-.020 (.25-.51)
Side Clearance
Standard .002-.004 (.05-.10)
Wear Limit .006 (.15)
No. 3 (Oil)
End Gap (Steel Rail) .010-.035 (.25-.89)
Side Clearance Snug Fit
(1) Measured at piston pin bore center line, at 90° angle to pin.