Chevrolet 1988 Light Duty Truck Repair Manual page 386

6A1-34 2.5 LITER L4 ENGINE
CRANKSHAFT:
Diameter
Main Taper
Journal Out of Round
Main Bearing C learance
Crankshaft End Play
Diameter
Crankpin Taper
Out of Round
Rod Bearing C learance
Rod Side Clearance
CAMSHAFT:
Lobe Lift (Intake and Exhaust)
End Play
Journal Diameter
Journal Clearance
VALVE SYSTEM:
Lifter Type
Lifter Leak — Down Rate
Lifter Body Diameter
Lifter Bore Diameter
Lifter Clearance in Bore
P lunger Travel
Pushrod Length
Valve Lash
Rocker Arm Ratio
Face Angle (Intake & Exhaust)
Seat Angle (Intake & Exhaust)
Seat Runout (Intake & Exhaust)
Intake
Seat Width
Exhaust
Stem C learance
Stem Diameter
Free Length
Valve Pressure
N @ mm
Spring
Installed Height
SPECIFICATIONS
ENGINE SPECIFICATIONS (CONT.)
All specifications are in INCHES unless otherwise noted.
Intake
Exhaust
Intake
Exhaust
Closed
Open
2.300
0.0005
0.0005
0.0005-0.0022
0.0035-0.0085
2.000
0.0005
0.0005
0.0005-0.0026
0.006-0.002
0.398
0.015-0.0050
1.869
0.0007-0.0027
Hydraulic
12-90 Seconds with 50 lb. load
0.8420-0.8427
0.8435-0.8445
0.0025
0.125
8.299
NOT ADJUSTABLE
1.75:1
4 5°
0.002
0.035-0.075
0.058-0.097
0.0010-0.0025
0.0013-0.0030
0.3133-0.3138
0.3128-0.3135
1.78
71-78 lbs. @ 1.440
158-170 lbs. @ 1.040
1.440
F-04486