Lubrication System Specifications; Engine Dimensions And Fits; Crankshaft Specifications; Valve System Specifications - Pontiac TRANS AM 1977 Service Manual

2 3 1 V6 ENGINE V.I. CODE C
6A3-25
Exhaust Valve Material
.................
21-2 Nickel-Plated Face
and Chrome Flashed Stem
Valve Lifter Mechanism
.......................................
Hydraulic
Valve Springs
....................................
Intake . Single Helical
Valve Springs
.................
Exhaust . Helical with Dampener
LUBRICATION SYSTEM
SPECIFICATIONS
Type of Lubrication
Main Bearings
......................................................
Pressure
Connecting Rods
................................................
Pressure
Piston Pins
.................................................................
Splash
Camshaft Bearing
....................................................
Pressure
Timing Chain
....................
Drop From Front Cam Bearing
Cylinder Walls
............................................................
Splash
Oil Pump Type
.................................................
Gear Driven
Normal Oil Pressure
.............................
37 lbs
.
at 2600 rpm
.....................................
Oil Pressure Sending Unit Electrical
Oil Intake
..............................................................
Stationary
Oil Filter System
...................................................
Full Flow
Filter Type
.........................
Throw-Away Element and Can
Crankcase Capacity
.
With Filter
..........................
5 Quarts
Crankcase Capacity . Less Filter
...........................
4 Quarts
ENGINE DIMENSIONS AND FITS
General
Piston Clearance Limits
Top Land
...........................................................
.026.. 034
Skirt Top
.........................................................
.0008.. 0020
Skirt Bottom
..................................................
.0013.. 0035
Ring Groove Depth
................... ............
#
1 . Compression Ring
. .
.184.. 194
#2 . Compression Ring
.....................................
.186.. 194
#3 . Oil Ring
.....................................................
.188.. 196
Ring Width
.....................................
#
1
.
Compression Ring .168.. 178
#2
.
Compression Ring
.....................................
.168.. 178
......................................................
#3
.
Oil Ring 135.
.
142
Ring Gap
#
1
.
Compression Ring
.....................................
.010.. 020
....................................
#
2 . Compression Ring 0 10..020
#3 . Oil Ring
.....................................................
.015.. 035
Piston Pin Length
.........................................................
3.060
...................................................
Diameter of Pin 939 1..9394
Clearance
In Piston (Selected)
.......................................
.0004~. 0007
Press Fit In Rod
.............................................
.0007.. 0017
Direction and Amount Offset
in Piston
.......................................
040 Major Thrust Side
All measurements in inches. unless otherwise
specified
.
CONNECTING ROD SPECIFICATIONS
Bearing Length
................................................................
737
Bearing Clearance (Limits)
......................
. .
..............
0005
............................
End Play
-
Total for Both Rods
.006-. 027
CRANKSHAFT SPECIFICATIONS
End Play at Thrust Bearing
...................................
.004.. 008
Main Bearing Journal Diameter
..............................
2.4995
............
......
Crankpin Journal Diameter
. . . .
1.99 1.2.0000
Main Bearing Overall Length
................................................................................
#
1 864
..............................................................................
#2 1057
................................................................................
#3 864
................................................................................
#4 864
Main Bearing to Journal
.........................................................
Clearance .0004-. 0015
CAMSHAFT SPECIFICATIONS
Bearing Journal Diameter
...................................................................
#
1 1.785.1.786
...................................................................
#2 1.785.1.786
...................................................................
#3 1.785.1.786
#4
..................................................................
1.785.1.786
...................................................................
#5 1.785.1.786
Journal Clearance in Bearings
..................
.0005.. 0025
(#
1)
.0005.. 0035 (#2, #3, #4)
VALVE SYSTEM SPECIFICATIONS
231 CU
.
IN
Rocker Arm Ratio
..................................................
1.55 to 1
Valve Lifter Diameter
.....................................
.842OV.. 8427"
Valve Lifter Clearance in Crankcase
.............
.0008".. 0025"
Intake Valve
............................................ .
Head Diameter 1.630". 1 620"
....................................................................
Seat Angle 45"
Stem Diameter
...........................................
.3412".. 3405"
.
.......................
Clearance in Guide
. . . . . .
001 5" ..0032"
Exhaust Valve
.............................................
Head diameter 1.430". 1.420"
....................................................................
Seat Angle 45"
..................... .............
Stem Diameter
...........
.3412"..3405"
.....................................
Clearance in Guide .0015".. 0032"
Valve Spring
Valve Closed . Pounds @ Length Net
Including Dampener
.....................................
645 @ 1.727"
Valve Open . Pounds @ Length Not Including
Dampener ....................................................... 1686@ 1.327"