1993 CHEVROLET DYNASTY Service Manual

Page 1649 of 2438

CHEVROLET DYNASTY 1993  Service Manual cylinder bore. Check gap with feeler gauge (Fig. 7). 
Refer to (Fig. 8) for specification.(2) Check piston ring to groove clearance; Refer to
Piston Ring Specification Chart (Fig. 8).
Fig. 4 Remove Pi

Page 1650 of 2438

CHEVROLET DYNASTY 1993  Service Manual PISTON RINGSÐINSTALLATION
(1) The No. 1 and No. 2 piston rings have a differ- 
ent cross section. Install rings with manufacturers
mark and size mark facing up, to the top of the pis-
ton (Fig. 10).

Page 1651 of 2438

CHEVROLET DYNASTY 1993  Service Manual (2) Tighten nuts to 52 N Im (38 ft. lbs.). 
(3) Remove connecting rod cap and measure Plas-
tigage (Fig. 16). 
CAUTION: Do not rotate crankshaft or the Plasti- 
gage may be smeared.
CONNECTING ROD SID

Page 1652 of 2438

CHEVROLET DYNASTY 1993  Service Manual CRANKSHAFT AND CYLINDER BLOCK, ASSEMBLY SERVICE
CRANKSHAFT SERVICE
The crankshaft is supported in four main bearings. 
All upper bearing shells in the crankcase have oil
grooves. All lower bearing she

Page 1653 of 2438

CHEVROLET DYNASTY 1993  Service Manual PLASTIGAGE MEASUREMENT
(1) Remove oil from journal and bearing shell. 
(2) Install crankshaft.
(3) Cut plastigage to same length as width of the
bearing and place it in parallel with the journal axis.

Page 1654 of 2438

CHEVROLET DYNASTY 1993  Service Manual (Fig. 9) are different, one has end positioning tabs, 
while the other is plain. One  pairof each thrust 
washers are installed into the block and one  pair 
into the main bearing cap (Fig. 9). (2) Ap

Page 1655 of 2438

CHEVROLET DYNASTY 1993  Service Manual (3) Apply light coating of engine oil to the entire 
circumference of oil seal lip. (4) Install seal assembly on cylinder block and
tighten bolts to 12 N  Im (104 in. lbs.)
FRONT CRANKSHAFT OIL PUMP A

Page 1656 of 2438

CHEVROLET DYNASTY 1993  Service Manual (1) Clean cylinder block and check top surface for 
distortion with a straight edge and thickness gauge
(Fig. 16). (2) Top surface must be flat within:  ² 
Standard Value: 0.05 mm (.002 inch) 
²  Se