Plastigauge
7EN0459
7EN0141
7EN0460
12 mm
7EN0461
INSPECTION
CRANKSHAFT OIL CLEARANCE (PLASTIGAUGE METHOD)
NOTE
If the oil clearance exceeds the limit, replace the bearing, and crankshaft if necessary.
This crankshaft oil clearance can be measured easily by using a plastic gauge, as follows:
1Remove oil and grease and any other foreign material from crankshaft journal and bearing inner surface.
2Install the crankshaft.
3Cut the plastigauge to the same length as the width of bearing and place it on journal in parallel with its axis.
4Gently place the crankshaft bearing cap over it and tighten the bolts to the specified torque.
5Remove the bolts and gently remove the crankshaft bearing cap.
6Measure the width of the crushed plastic gauge at its widest section by using a scale printed on the plastigauge package.
Standard values: 0.02 - 0.04 mm
Limit: 0.1 mm
CYLINDER BLOCK
(1)Visually check for scratches, rust and corrosion. Also use flaw detecting agents and the like to check for cracks. If there are any defects, rectify the cylinder block.
(2)Measure the flatness of the cylinder block top surface with a straight edge and a thickness gauge. During measurement, the cylinder block top surface must be free from gasket pieces and the like.
Standard values: 0.05 mm
Limit: 0.1 mm
(3)Check for scratches or seizure of the cylinder wall. If there are any defects, correct (bore it a oversize) or change the cylinder block.
(4)Measure the inside diameter and the ovality of the cylinder. If the cylinder is overly worn, correct it to a larger size and change the pistons and the piston rings.
Standard value:
Cylinder inside diameter 91.1 mm Ovality: 0.01 mm
E Mitsubishi Motors Corporation | Dec. 1996 | PWEE9615 |
