| Type |
V
90º |
| Number
of Cylinders |
8 |
| Bore |
4.00
|
| Stroke |
3.90
|
| Piston
Displacement |
392
cu. in.
|
Compression
Ratio
|
10.0
to 1 |
Compression
at 150 rpm
wide open throttle |
150
to 200 lb. |
Maximum
variation between
cylinders |
20
lb. |
| Firing
order |
1-8-4-3-6-5-7-2 |
Cylinder
Numbering
| From
front of engine |
Left
Bank 1-3-5-7
Right Bank 2-4-6-8 |
Crankshaft
| Type |
Fully
Counterbalanced |
| Bearings |
Steel
Backed Babbitt |
| Journal
Diameter |
2.687
to 2.688 |
| Crank
Pin Diameter |
2.374
to 2.37 5 |
| Maximum
Out Of Round Permissible |
.001 |
| Number
Of Main Bearings |
5 |
|
| Diameter
Clearance ( desired ) |
.
0005 to .0015 |
| End
Play |
.002
to .007 |
| Thrust
Taken By |
#3
Main Bearing |
| Finish
at Rear Seal Surface |
Diagonal
knurled |
| Interchangeability
of Bearings |
Upper
and Lower #'s 1,2,4
Upper and Lower # 3
Upper and Lower not Interchangeable # 5 |
Main
Bearing (service)
All Available i n Standard and
the following Undersized |
.001
.002 .003 .010 .012
|
Connecting
Rods and Bearings
| Type |
Drop
Forged I Beam |
| Length
(center to center) |
6.951 |
| Weight
(less bearing) |
27.6
oz. |
| Bearings |
Steel
Backed Babbitt
|
| Diameter
and Length |
2.375
x 29/3 2 |
| Diameter
Clearance Desired |
.0005
to .0015 |
| Maximum
Allowable Before Reconditioning |
.0025 |
| Side
Clearance |
.006
to .014 |
| Bearings
for Service |
Standard,
. 001, .002, .003,
.010, .012 U.S. |
Connecting
Rod Bushing
| Type |
Steel
Backed Bronze |
| Number
of Bearings |
8 |
| Diameter
and Length |
.9843
to .98 46 x 1 1/4 |
| Interchangeability |
All |
| Clearance |
.0001
to .0004 Selective |
Camshaft
| Drive |
Chain |
| Bearings |
Steel-Backed
Babbitt
|
| Number |
5 |
| Thrust
Taken By |
Thrust
Plate |
| End
Play |
.002
to .006 |
Maximum
Allowable Before
Reconditioning |
.010 |
| Diameter
Clearance |
.001
to .003 |
Maximum
Allowable Before
Reconditioning |
.005 |
Camshaft
Bearing Journals Diameter and Length
| No.
1 |
1.998
to 1.999 x 15/16 |
| No.
2, 3, 4 |
1.998
to 1.999 x 3/4 |
| No.
5 |
1.4355
to 1.4365 x 29/32 |
Camshaft
Bearings Diameter and Length (after reaming)
| No.
1 |
2.000
to 2.001 x 15/16 |
| No.
2, 3, 4 |
2.000
to 2.001 x 13/ 16 |
| No.
5 |
1.4375
to 1.4385 x 7/8 |
Camshaft
Chain
| Adjustment |
None |
| Number
of Links |
68 |
| Pitch |
.375 |
| Width |
1
1/8 |
Tappets
| Type |
Hydraulic |
| Clearance
in Block |
.0005
to .001 5 |
| Body
Diameter |
.9040
to .9045 |
Clearance
Between Valve Stem
and Rocker Arm or Tappet |
Dry
Lash .060 to .210 |
Pistons
| Type |
Horizontal
Slot with Steel Strut |
| Material |
Aluminum
Alloy Tin Coated |
| Land
Clearance (diameter) |
.029
to .034 |
| Clearance
at Skirt ( 1 1/2 from Bottom of Skirt) |
.0005
to .0015 |
| Weight
(Standard through .060 oversize) |
700
gm. |
| Piston
Length (overall) |
4 |
|
| Ring
Groove Depth |
No.
1 .209
No. 2 .209
No. 3 .201 |
| Pistons
for Service |
Standard,
.0 05, .020, .040 |
|
|
Piston
Pins
| Type |
Full
Floating |
| Diameter
and Length |
.9841
to .98 43 x 3.140 to 3.150 |
| Clearance
in Piston (thumb press at 70- 86; F.) |
.0000
to .0005 |
| End
Play |
.004
to .026 |
| Clearance
in Rod (selective) |
.00
01 to .0004 |
| Piston
Pins for Service |
Standard
, .003, .008 |
| Direction
Offset in Piston |
Toward
Right Side of Engine |
Piston
Rings
| Number
of Rings per Piston |
3 |
| Number
of Compression Rings per Piston
| 2 |
| Number
of Oil Rings per Piston |
1 |
| Width
of Rings |
Compression
.0775 to .0780
Oil .1860 to .1865
|
| Piston
Ring Gaps |
.013
to .025 |
| Ring
Side Clearance |
Compression
Upper .002 to .0035
Intermediate .0020 to .0035
Oil .0010 to .0025
|
Valves
- Intake
| Material |
Silicon-Chromium
Steel |
| Head
Diameter |
2 |
| Length
(to top of valve face) |
5
1/32 |
| Stem
Diameter |
.372
to .373 |
| Stem
to Guide Clearance |
.001
to .003 |
Maximum
Allowable Before
Reconditioning |
.004 |
| Angle
of Seat |
45º |
| Adjustment |
None |
| Lift |
.388 |
Valves
- Exhaust
| Material |
Nitrogen
Treated Manganese
Chromium-Nickel Steel |
| Head
Diameter |
1
3/4 |
| Length
(to top of valve face) |
5
1/32 |
| Stem
Diameter |
.371
to .372 |
| Stem
to Guide Clearance |
.002
to .004 |
Maximum
Allowable Before
Reconditioning |
.006 |
| Angle
of Seat |
45º |
| Adjustment |
None |
| Lift |
.388 |
Valve
Springs
| Number |
16 |
| Free
Length |
2 |
| Load
When Compressed to (valve closed)
| 1
11/16 - 78 to 88 lbs. |
| Load
When Compressed to (valve open) |
1
5/16 - 170 to 184 lbs. |
| Valve
Spring ID |
Cylinder
Head
| Number
Used |
2 |
| Combustion
Chamber |
Hemispherical |
| Valve
Seat Run-out (maximum) |
.00
3 |
| Intake
Valve Seat Angle |
45º
; |
| Seat
Width (finished) |
.060
to .0 85 |
| Exhaust
Valve Seat Angle |
45º
; |
| Seat
Width (finished) |
.040
to .0 60 |
| Cylinder
Head Gasket (thickness) |
.028 |
Engine
Lubrication
| Pump
Type |
Rotary,
Full Pressure |
Capacity
(qt.) - When Filter Element
is Replaced add 1 qt. |
5 |
| Pump
Drive |
Camshaft |
| Operating
Pressure at 40 to 50 MPH |
40
to 65 lb.
|
| Pressure
Drop Resulting from Clogged Filter |
15
to 20 lb. |
|
