GENERAL SPECIFICATIONS
|
| Model Designation: Special
8 - Series 40 |
| Wheel base: Special
8: 121 |
| Valve Location: In
head |
| Bore and
Stroke: 3-3/32
x 4-1/8 |
| Piston displacement, Cubic
Inches: 248 |
| Compression
ratio: 6.3 |
| Maximum
Brake Horsepower: 110 @ 3600 RPM |
| Maximum
Torque Lbs.Ft. @ RPM: 206 @ 2000 RPM |
| Normal
Oil Pressure Pounds: 35 |
TUNE UP SPECIFICATIONS
|
| Spark Plug
Make: AC 48 |
| Spark Plug
Gap, Inch: .025 |
| Firing
Order: 16258374
|
| Ignition
Timing: ADV. Timing
mark on Flywheel |
| Engine
Idle Speed, RPM: 450 |
| Cylinder
Head Torque Lbs.Ft.: 65-70 |
| Compression
Pressure & Cranking Speed: 112
Min. |
| Voltage & Polarity: 6
volts, negative ground |
PISTON AND RING SPECIFICATIONS
|
Fitting
Pistons with Scale:
Piston should fall on a .0015
feeler and stay on a .002 feeler |
Ring End
Gap: (Fit rings in tapered
bores for clearance shown in tightest portion of
ring travel.)
Compression: .010
Oil: .010 (no fitting necessary with Flex-Fit oil
rings) |
| Clearance
in Groove: Compression:
.0015-0035; Oil: .0015-.003 (Flex-Fit oil rings:
.0015-.0035 |
| Wristpin
Diameter, Inch: .8124-.8129 |
VALVE SPECIFICATIONS
|
Operating
Clearance:
Intake:
.015 Hot Exhaust: .015 Hot (with hydraulic
lifters clearance is 0) |
| Valve Seat
Angle, degrees: 45 |
Valve Timing: (BTDC
= before top dead center; ATDC = after top dead
center)
Intake
opens: 13 degrees BTDC
Exhaust
Closes: 22 ATDC |
Valve Spring
Pressure Pounds at Inches Length:
Inner
Spring: 51 @ 1-5/16; Outer Spring: 77 @ 1-19/32 |
| Valve Stem
Clearance: Intake: .0025; Exhaust:
.003 |
ENGINE BEARING SPECIFICATIONS
|
Connecting Rod Bearings:
Journal
Diameter, Inches: 1.998-1.999
Bearing Clearance, Inch: .0005-.002
Rod End Play, Inch: .005-.010
Rod Bolt Tension: Lbs.Ft.: 40-45 |
Main Bearings:
Journal
Diameter, Inches:
No. 1: 2.3105
- 2.3115
No. 2: 2.3735
- 2.3745
No. 3: 2.4355
- 2.4365
No. 4: 2.4985
- 2.4995
No. 5: 2.5605
- 2.5615
Bearing clearance: .0005-.002
Shaft End Play: .004-.008 (Thrust
on Bearing No. 3)
Main Bolt Tension: Lbs.Ft.: 90-100 |
CAPACITY DATA
|
Cooling
System:
Without
heater: 13 quarts (with Dynaflow 14)
With heater: 14-1/2 quarts (with Dynaflow
15-1/4) |
| Fuel Tank: 19
gallons |
| Engine
Oil: 5-1/2 quarts |
| Transmission: 1-3/4
w/auto 9-1/2 qts. |
| Rear Axle: 4
pints |
1949 Buick 248 Inline 8 (110 hp) Engine Specs
1949 Buick 248 Inline 8 (115 hp) Engine Specs
1949 Buick 248 Inline 8 (120 hp) Engine Specs
1949 Buick Inline 8 Engine Specs:
Delco-Remy Distributor Specs
1949 Buick 248 Inline 8 Engine Specs:
Delco-Remy Generator Specs
1949 Buick 248 Inline 8 Engine Specs:
Delco-Remy Regulator Specs
1949 Buick 248 Inline 8 Engine Specs:
Delco-Remy Starting Motor Specs
1949 Buick 248:
Wheel Alignment Specs
Return to Buick Engine Specs Index
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