63
seal carrier with vise.. The magnitude of interference for real oil seal and carrier hole is 0.26—0.50mm.
——Install new sealing gasket of real oil seal carrier.
——Install real oil seal carrier assembly. Before assembling, wrap a piece of plastic piece on the
crankshaft to avoid damaging oil seal. At the same time, apply engine oil on oil seal edge and journal for
oil seal.
——Measure the roughness of lower oil seal carrier surface and oil pan flange surface of cylinder block. It
should be adjusted to the range of
±
0.26mm.
——Tighten four M6 bolts to 8.0 —11.0Nm
。
——Remove the plastic piece.
【
11
】
. Removal and installation
crankshaft, crankshaft thrust washer, halves and main bearing cap Removal
：
——Before removing, check the end play of crankshaft first. Use the plunger of dial indicator to contact
bearing face of the crankshaft (lightly compressing).
Push the crankshaft away from the contacting tip. Adjust dial indicator to and then use post to push the
crankshaft toward such as possible. Check dial indicator. The reading is end play. The end play of the
crankshaft should be 0.092—0.303mm.
If dial indicator is not available, the end play of the crankshaft may be checked by feeler leaf. Between
the third main bearing cap and crankshaft, it should be checked by feeler leaf (push and pull crankshaft)
。
——Loosen main bearing bolt and stud
，
(start with the middle bearing cap), take out the bolt and stud,
remove main bearing cap and the other shell of main bearing bushings. The other shell of main bearing
bushing is still kept in main bearing cap.
——Remove the crankshaft.
——Remove the thrust plates of crankshaft (two pieces) from the cylinder block. Check
：
——Check
main journal and main bearing bushing clearance.
Clean the main journal of crankshaft, inner bore of main bearing cap and main bearing bushings with
non-woven. Put plastic clearance gauge on the main journal paralleling with the generatrix of main journal.
Its length should be a little shorter than the width of main journal.
Note: Don’t rotate the crankshaft! Mount the main bearing cap. Screw the bolt of main bearing cap by hand.
Tighten to 90—100Nm. Don't rotate the crankshaft.
