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6A1-30
1977 PONTIAC SERVICE MANUAL
ENGINE
-
GENERAL SPECIFICATIONS
I
I
I n Line,
4
Cyl.
Bore and stroke (nominal)
Overhead Cam
3.501
X
3.625
Bore spacing (CIL t o CIL)
No. system
L. Bank
1-2-3-4
(front t o
R. Bank
Firing Order
1
1-3-4-2
1
.
- -
. . .
- -
.
-
.
.
.
---
mtg. points
Rear
1
One
Engine installation angle
Re
F-----
' - A ' . . - '
13.83
I
I
Cylinder Head Material
Cylinder Block Material
Cyl. Sleeve-Wet, dry, none
Number
nf
I
Frnnt
I
Unleaded-91 (or higher)
I
Cast Iron Alloy
Die Cast Aluminum
None
Twn
regular
-
premium
I
Cylinder Head Volume (cc)
173.5
Head Gasket Thickness
a
. , .
I
1L.U
Chamber Volume (cc)
I
(Compressed)
Head Gasket Volume (cc)
Deck Clearance (minimum)
(above or below block)
Minimum Combustion
ENGINE
-
PISTONS
(a) Measured
1.50
below top of piston
.U4Y
8.08
.W25
(below)
--
A
ENGINE
-
PISTON RINGS
b
I
Function
(top t o
bottom)
I
Gap
r(c)
IMulti-piece
(2
rails and
1
Compres-
sion
No.
1,
o i l or a m p .
,
No.
2,
oil or wmp.
No.
3,
oil or wmp.
Descri~tion
-
(a) Cast iron, barrel face:
No.
1
-
chrome plated
No.
2
-
chrome plated, inside bevel
(c) NO.
1-.015-.025;
NO.
2-.009-.019
Compression
Compression
Oil
material, coating,
etc.
Width
Oil
(a)
.0775
-
.0780
Description
-
spacer-expander) Rails:
material, coating,
Steel with chrome plated
etc.
O.D.
Expander:
eel
Width
.I87
-
.I89
Gap
.010
-
.030
ENGINE
-
CRANKSHAFT
ENGINE
-
CAMSHAFT
Expanders
I n Oil Ring Assembly
ENGINE
-
PISTON PINS
Location
I n Cyl. Head
Material
Cast Alloy Iron
Babbit on Steel
I
Type of
Drive
Chromium Steel
2.75
.9270
-
.9273
Locked i n Rod
None
--
.WO3
-
.OM4
Press F i t
To
Riaht -060
Material
Length
Diameter
Sintered lron
s ~ r o c k e t material
Ty pe
Clearance
Timing
No. of links
I91
Teeth
chain
Width
1.954
-
1.031
Pitch
1.500
Locked i n rod, in
piston, floating, etc.
Bushing
I n rod or piston
Material
In
piston
I n rod
(a) Timing belt-fiberglass reinforced cog
Direction
&
amount offset in oiston
Outer
Valve closed
-
79
@
.746
spring
(Ib. @ in.)
prers&
Valve
open
183
-
197
@
1.310
length
(Ib.
@
in.)
(a) Stellite Face
ENGINE
-
CONNECTING RODS
i
Material
14.24
Material
&
Type
Premium Aluminum
Clearance (limits)
.0007
-
.0027
End Play
.00g
-
.013
4686
Fig.
6A1-73
Engine Specifications
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