Sentra L4-1597cc 1.6L DOHC MFI (GA16DE) (1991)
Piston: Service and Repair
CYLINDER HEAD
Reverse disassembly procedure to assemble, installing valve springs with narrow pitch of spring toward head.
PISTON, ROD & CRANKSHAFT
Fig. 27 Main Bearing Cap Bolt Tightening Sequence
Fig. 28 Piston Ring Gap Spacing
Fig. 29 Piston Dimensions
1.
Install crankshaft main bearings and caps and tighten in sequence shown in Fig. 27 to specifications. If crankshaft endplay was out of specification
when measured, replace the thrust bearing.
2.
Install piston rings as shown in Fig. 28, then install connecting rod bearings with oil holes aligned. Install piston and rod assemblies into proper
cylinder and torque rod bolts to 10-12 ft. lbs. plus an additional 35-40° or to 17-21 ft. lbs. Piston skirt diameter (A) should be 2.9911-2.9915 inch
standard piston and dimension (a) .374 inch, Fig. 29.
3.
Connecting rod side clearance should be .0079-.0185 inch. If not, replace connecting rod or crankshaft.