Team Buick     Buick
  Forums | Classifieds   


Buick Fireball Eight

General Specifications for the 263 and 320 straight eight Buick engines. The following information has been directly complied from the original 1952 Buick service manual.


BOLT TORQUE SPECIFICATIONS
LOCATION THREAD SIZE TORQUE
Spark Plug 14MM 22-28
Crankcase Drain 28MM 30-35
Lower Crankcase 5/16-18 6-15
Flywheel Housing to Upper Crankcase 7/16-14 55-60
Timing Gear Cover 3/8-16 15-20
Valve Push Rod Cover 5/16-18 4-5
Valve Rocker Arm Cover 5/16-24 4-5
Water Pump Mounting 3/8-16 25-30
Manifold Stud 3/8-24 25-30
Cylinder Head 7/16-14 65-70
Con. Rod Bolt - Series 40-50 3/8-24 40-45
Con. Rod Bolt - Series 70 7/16-24 60-65
Piston Pin Clamp 5/16-24 25-30
Crankshaft Bearing Clamp 1/2-13 90-100
Balancer Retaining 3/4-16 100-110
Flywheel to Crankshaft, Synchromesh 3/8-24 35-40
Flywheel to Crankshaft, Dynaflow 7/16-24 50-55
Rocker Arm Shaft Bracket 3/8-16 30-35
Rocker Arm Shaft Bracket Stud 3/8-24 30-35
Generator to Bracket Bolt 3/8-24 25-30
Generator Mounting Bracket to Crankcase 3/8-16 30-35
Front Engine Mounting Bracket to Frame Bolt 3/8-24 30-35
Front Engine Mount Stud 3/8-24 30-35
Transmission Mounting Pad to Rear Bearing Retainer 3/8-16 30-35
Transmission Mounting Pad to Transmission Support Bolt 3/8-24 30-35
Transmission Support to Fame Cross Member Bolt 3/8-24 20-25
Thrust Pad to Transmission Support and Thrust Plate 3/8-24 30-35
Buick Eight Torque

GENERAL SPECIFICATIONS
General Information

Items

Series 40-50 Series 70
Type <------------Valve in Head----------->
Cylinders and Arrangement <---------------8 in Line------------->
Bore and Stroke 3 3/16" X 4 1/8” 3 7/16"X 4 5/16”
Piston Displacement 263.3 320.2
Compression Ratio
     Syncromesh - Series 40 Only 6.6 to 1 ---
     Syncromesh - Series 50 Only 6.9 to 1 ---
     Dynaflow - All Series 7.2 to 1 7.5-1
Compression Pressure @ Cranking Speed (psi)
     Syncromesh - Series 40 Only 114 ---
     Syncromesh - Series 50 Only 118 ---
     Dynaflow - All Series <-----------------120---------------->
Firing Order <----------1-6-2-5-8-3-7-4---------->
Taxable Horsepower 32.51 37.81
Max B.H.P. @ RPM.
     Syncromesh - Series 40 Only 120 @ 3600 ---
     Syncromesh - Series 50 Only 124 @ 3600 ---
     Dynaflow - All Series 128 @ 3600 168 @3800
Engine Weight, Less Clutch and Mountings (lbs.) 746 749
833
Number of Mounting and Material <----------3 Synthetic Rubber--------->
Cylinder Crankcase and Cylinder Head
General Information

Items

Series 40-50 Series 70
Cylinder Crankcase Type <---Black Cast Integral with Crankcase--->
Cylinder Head Type and Material <----------One Piece, Cast Iron--------->
Combustion Chamber <---------------Cast in Head------------>
Head Bolts, Number and Diameter <----------------22, 7/16″-------------->


Crankshaft Bearings, Flywheel Balancer
Crankshaft Wieght (lbs.) 90 116
Number of Crankshaft Bearings 5 5
Bearing Which Takes Thrust <-----------------Center---------------->
Crankshaft Bearing Type <-------------Replacable Liners---------->
Crankshaft Bearing Material <---------Steel Backed Durex 100A------->
Provision for Bearing Adjustment <-----------------None------------------>
Bearing Cap Bolts, No. and Diam.
    Rear Bearings Two 1/2” Four 1/2”
    Other Bearings Two 1/2” Two 1/2”
Flywheel
    Material and Wieght, Syncro-mesh C.I.-36.56 ---
    Material and Wieght, Dynaflow Steel - 9.23 Steel - 12.21
Number of Teeth on Ring 146 156
Crankshaft Balancer Type <--Laminated Steel Flywheel on Steel Leaf Springs-->
Balancer Location <---------Front End of Crankshaft--------->
Connecting Rods, Pistons and Rings
Connecting Rod Bearing Type <---------Steel Backed Durex 100-A-------->
Connecting Rod Bearing Material <--------------Replacable Liners------------>
Provision for Bearing Adjustment <------------------None------------------->
Number and Diam. of Cap Bolts Two 3/8” Two 3/8”
How are Rods and Pistons Removed <-----------From Top of Cylinder----------->
Piston Type <----------------Full Skirt---------------->
Piston Material and Surface Treatment <--------Aluminum Alloy - Anodized------->
Compression Rings Per Piston 2 2
     
 
     Type <--------------Inside Bevel--------------->
Oil Rings Per Piston 2 2
     Type, Upper <-------Channeled - Oil Return Slot------->
     Type, Lower <----------------Flex-Fit----------------->
Location of All Piston Rings <------------Above Piston Pin------------>
Camshaft and Valve Mechanism
Camshaft Drive <-------------Link Belt Chain------------>
Number of Camshaft Bearings 5 5
Camshaft Bearing Material <----------Steel Backed Babbitt--------->
Camshaft Thrust Control <-----------Plate at Front End----------->
Camshaft Sprocket
     Material and Width <------------Cast Iron, 13/16″----------->
     No. of Teeth 38 38
Crankshaft Sprocket
     Material and Width <--------------Steel, 13/16″------------->
     No. of Teeth 19 19
Timing Chain Width 13/16” 13/16”
Valve Lifter Type
     Series 40, Synchromesh only Plain Sleeve ---
     Series 50, All Dynaflow <---------------Hydrualic---------------->
Valve Type
     Inlet <--------------Streamlined--------------->
     Exhaust <---------------Mushroom---------------->
Valve Seat Angle, Inlet and Exhaust <--------------45 Degrees--------------->
Valve Spring Type <--------------Dual Helical--------------->
Valve Guide Type and Material <---------Removable, Cast Iron----------->
Engine Oiling System
Oiling System Type <---------------Forced Feed---------------->
Oil Supplied to Bearing Surfaces -
     Crankshaft Bearings <-----------------Pressure------------------>
     Connecting Rod Bearings <-----------------Pressure------------------>
     Pistons and Pines <------------------Spray-------------------->
     Camshaft Bearings <-----------------Pressure------------------>
     Timing Chain and Sprockets <-----------Metered Jet and Spray----------->
     Rocker Arms and Valves <---------------Low Pressure---------------->
     Valve Lifters <---------------Low Pressure---------------->
Location of Oil Filter <---------In Valve Rocker Arm Cover--------->
Location of Oil Drain <-----------Plug in Lower Crankcase---------->
Oil Reservoir Capacity - Quarts (add 1 1/2 qts for dry oil filter
     Dry Engine 6 8
     Refill 5 1/2 7
Oil Level Guage <---------Rod in R. Side of Crankcase-------->
Oil Level Pressure Guage Make <--------------------A/C-------------------->
Normal Oil Pressure <-------------35 lbs. at 35 mph.------------->
Oil Pump Type <----------------Helical Gear---------------->
Oil Pump Location <-------Suspended in Lower Crankcase------->
Oil Screen Location <--------On Float Attached to Pump--------->
Oil Pressure Regulator Type <------Non-Adjustable Spring and Valve------>
Engine Cooling System
Cooling System Type <-----------------Pressure------------------>
Water Temperature Control <--------Thermostat and Fixed Bypass------->
Cooling System Capacity - Quarts (Add 1 1/2 qts. for Dynaflow)
     Less Heater 12 18
     With Heater 13 1/2 19 1/2
Location of Drains <-Cocks in Rad. and in R.H. Side of Crankcase->
Water Pump Type <----------------Centrifugal----------------->
Water Pump Location <----------Front End of Crankcase----------->
Water Pump and Fan Drive (With Generator) <----------Single Vee Belt------------->
Water Pump to Crankshaft Speed Ratio <-----------------0.9 to 1----------------->
Water Pump Bearing Type <----------Sealed Double Row Ball------------>
Water Pump Seal Type <----------Spring Loaded, Packless----------->
Fan Diameter <-------------------18"--------------------->
Number of Blades 4 5
Radiator Make <-------------------Harrison----------------->
Core Type <----------------Vee Cellular--------- ------->
Core Material <-------------------Copper------------------>
Core Frontal Area (sq. in.)
     Syncromesh 415 ---
     Dynaflow 484 484
Core Thickness 2” 3”
Radiator Pressure Control <--------------Valve in Filler Cap------------->
Radiator Pressure <-------------------7 lbs.------------------->
Radiator Thermostat - Make <------------------Harrison------------------>
Thermostat Location <--------In Housing Above Water Pump------->



ENGINE DIMENSIONS AND FITS NOTE:Dimensions and limits for fir of parts apply to new parts only. Where limits are given, "T" means tight and "L" means loose. *A11 Measurements in Inches Unless Otherwise Specified.
Crankshaft and Connecting Rod Bearings
 
Series 40-50
Series 70
Crankshaft Bearing - Nominal Diam. X Length
 
 
 -Front
2 9/16" x 1 17/64”
2 9/16" x 1 9/32”
 -Front Center
2 9/16" x 1 1/32”
2 5/8" x 31/32”
 -Center
2 9/16" x 1 35/64”
2 11/16" x 1 15/32”
 -Rear Center
2 9/16" x 1 1/32”
2 13/16" x 2 15/32”
 -Rear
2 9/16" x 1 25/32”
2 13/16" x 2 15/32”
Crankshaft Journal Diameter
 -Front
2.5625" - 2.5632”
2.5605" - 2.5615”
 -Front Center
2.5625" - 2.5632”
2.6235" - 2.6245”
 -Center
2.5625" - 2.5632”
2.6855" - 2.6865”
 Center Rear
2.5625" - 2.5632”
2.7485" - 2.7495”
 -Rear
2.5625" - 2.5632”
2.8105" - 2.8115”
Crankshaft Bearing to Journal Clearance
.0006" - .0018”
.0006" - .0020”
Crankshaft End Play at Center Bearing
.004" - .008”
Fit to Main Drive Gear Pilot Bearing in Crankshaft
.004"T to .0012"L
---
Conecting Rod Bearing Nominal Diam. x Length
2 1/8" x 1.030”
2 1/4" x 1.306”
Crankpin Journal Diameter
2.125" - 2.126”
2.248" - 2.249”
Crankpin Journal to Bearing Clearance
.0005" - .0016”
End Clearance to Connecting Rod on Crankpin
.005" - .010”
Connecting Rod Length, Center to Center
7 3/8”
8 1/4”

Cylinders, Pistons, Pins and Rings
Cylinder Bores, Standard Size
3.186" - 3.189”
3.436" - 3.439”
Piston Lenth, Overall
3 49/64”
4 9/16”
Piston Diameter, Top of Skirt, at 90° to Piston Pin -
 -Standard
3.1860" - 3.1872”
3.4358" - 3.4370”
 -.005" Oversize
3.1916" - 3.1922”
3.4414" - 3.4420”
 -.010" Oversize
3.1966" - 3.1972”
3.4464" - 3.4470”
 -.020 Oversize
3.2066" - 3.2072”
3.4564" - 3.4570”
 -.30" Oversize
3.2166" - 3. 2172”
3.4664" - 3.4670”
Piston Clearance in Cylinder Bore at Top of Skirt
.0012" - .0018”
.0014" - .0020”
Piston Fit @70º F., using Feeler Gauges, Allowing
Piston to Drop on its Own Weight
.0015" GO - .002" NO GO
Piston Pin Length
2 11/16”
3 1/16”
Piston Pin Diameter
.8124" - .8129”
.8744" - .8749”
Piston Pin Fit in Piston at 70º F.
Finger Push Fit (.0003" - .0005")
Width of Compression Rings
3/32”
3/32”
Width of Channeled Oil Rings
3/16”
3/16”
Width of Flex-Fite Oil Rings
.186" - .187”
Width of Gap, Ring in Bore -
 -Compression and Upper Oil Ring
.010" - .020”
 -Fles-Fit Oil Ring
No Checking or Fitting Required
Side Cleraance of Rings in Piston Grove -
 -Compression Ring
.0015" - .0035”
 -Upper Oil Ring
.0015" - .003”
 -Flex-Fit Ring
.001" - .003”

Camshaft and Valve Mechanism
Camshaft End Play
.004" - .009”
Camshaft Bearings - Diam. x Lenth -
 -No. 1
2 5/32" x 1 1/8”
 -No. 2
2 1/8" x 3/4”
2 1/8" x 1 1/8”
 -No. 3
2 3/32" x 1 1/8”
 -No. 4
2 1/16" x 3/4”
2 1/16" x 15/16”
 -No. 5
1 3/4" x 31/32”
Camshaft Clearance in Bearings
.0015" - .004”
Valve Lifter Diameter
.9975" - .9985”
Valve Lifter Clearance in Crankcase
.0005" - .0025”
Rocker Arm Shaft O.D>
13/16”
13/16”
Rocker Arm Clearance on Shaft
.002" - .004”
Vavle Head Diameter -
 -Inlet
1 17/32”
1 25/32”
 -Exhaust
1 11/32”
1 7/16”
Valve Seat Angle - Inlet and Exhaust
45º
Vavle Lift -
 -Inlet
.348”
.347”
 -Exhaust
.342”
.348”
Vavle Stem Diameter -
 -Inlet
.3715" - .3719”
 -Exhaust
.3711" - .3719”
Vavle Stem Clearance in Guide -
 -Inlet
.0015" - .0035”
 -Exhaust
.0021" - .0039”
Vavle Guide Extension from Top of Cyl. Head
1 5/32”
1 5/32”
Inner Vavle Spring, Used with Adjustable Vavle Lash -
 -Valve Open (lbs. @ length)
48 - 54 @1 5/16”
---
 -Valve Closed (lbs. @ length)
17.5 - 22.5 @ 1 21/32”
---
Outer Vavle Spring, Used with Adjustable Vavle Lash -
 -Valve Open (lbs. @ length)
74 - 80 @1 19/32”
---
 -Valve Closed (lbs. @ length)
29.5 - 34.5 @ 1 15/16”
---
Inner Vavle Spring, Used with Hydraulic Lifters -
 -Valve Open (lbs. @ length)
49 -55 @1 5/16”
 -Valve Closed (lbs. @ length)
22 - 26 @ 1 21/32”
Outer Vavle Spring, Hydraulic Lifters -
 -Valve Open (lbs. @ length)
96 - 104 @ 1 19/32”
 -Valve Closed (lbs. @ length)
49 - 55 @ 1 15/16”

Valve Lash - Series 40 Synchromesh
NOTE: Does not apply to engines equipped with hydraulic vavle lifters.
Vavle Lash at Road Operating Temp.,
Inlet and Exhaust -
.015”
---
Valve Lash using Shop Proceedure
.017”Go-.018”No Go
---

Engine Oil System
Pump Shaft to Bearing Clearance
.0005" - .0020”
Pump Idler Gear Bearing Clearance
.001 - .0025”
Pump Drive Gear Backlash
.003" - .005”
Pump Drive and Idler Gears Backlash
.003 - .006”
Pump Drive and Idler Gears End Clearance
.003 - .006
Oil Pressure Valve Clearance in Body
.003" - .006”

Engine Cooling System
Fan Belt Adjustment
5/16”
Fit of Bearing in Water Pump Body
.0006T to .0009"L
Pump Bearing Shaft Diameter
5/8”
5/8”
Fan Hub Fit on Bearing Shaft
.001"T - .0025"L
Fan Hub Position on Bearing Shaft
13/64" from end
Radiator Hose Inside Diam. and Type
1 9/16" Elbow
Bypass Hose Inside Diameter
3/4”
Standard (151° ) Radiator Thermostat Calibration, @Atm. Press. -
 -Start to Leave Seat
148° to 155°
 -Fully Open
Not over 176°
Standard (182° ) Radiator Thermostat Calibration, @Atm. Press. -
 -Start to Leave Seat
178° to 185°
 -Fully Open
Not over 211°

Blue Print Specifications
 
248c
263c
320 
Bore
3 3/32””
3 3/16””
3 7/16””
Stroke
4 1/8”
4 1/8”
4 5/16”
Cylinder Head Volume
 
 
116cc
Piston Dome Volume
 
 
14cc
Deck Clearance
 
.0012” - .0018”
.0014” - .0020”
Rod Length
6.625
6.625
 
Rod/Stroke Ratio
1.604
1.604
 
Bore/Stroke Ratio
.748
.772
.798



You can post a comment or ask a question regarding this page HERE...

» Google!

 
copyright 2006, TeamBuick.com all right reserved
Team Buick - Forum - Classifieds - Journals - Garage - Archive - Top