1977 Mustang 302 engine

1977 Mustang Engine Information & Specs – 302 Windsor V8 (4.9 L)

The 302 Windsor V8 Technical Specs & Data

1977 Mustang Engine Information – 302 cubic inch V-8 (4.9 L Windsor V8)

The 302 Windsor V8

The 302’s life cycle lasted from 1968 to 1973.  In 1974 due to the Federal government’s rules driven by an oil shortage, Ford no longer offered the V8 powerhouse in the Mustang. However, for reasons unknown to consumers an anemic 302 was offered again in 1975 through 1978.

The engine bay was re-engineered to accept this updated 302 V8 option for the 1975 model year, with revised hood and header panel. The engine was limited to a two-barrel carburetor and 140 hp. In 1979, it was stopped and came back in 1982 with the moniker of 5.0L.

Learn more about the Ford Mustang 302 engine

Engine Basics

Year 1977
bbl 2 barrel
Cylinders 8
Power (hp) 129 hp @ 3,400 RPM
Torque (lb/ft) 242 lb/ft @ 2,000 RPM
Compression 8.4:1
Displacement 302 cu / 4.9 liters
Bore x Stroke 4.000 x 3.00

Note: Automakers in the U.S. switched from gross to net power and torque ratings in 1972 (coinciding with the introduction of low-compression engines); thus, it is difficult to compare power and torque ratings between 1971 and future years. 

Engine Specs (302 cid V8)

Spark Plugs
Oil filter
Gas Filter
Air Filter
PCV
Oil 5 quarts of 10W30 or 10W40 includes filter
Oil Pressure 40 – 60 PSI
Points Gap and Dwell at xxx RPM
Timing 6 Degrees BTDC Manual & 6 Degrees BTDC Automatic
Valve adjustment
Valve size Intake = 1.773 to 1.791, Exhaust = 1.442 to 1.460
Valve arrangement R. Side I E I E I E I E Front to rear
Valve arrangement L. Side E I E I E I E I Front to rear
Manifold Vacuum 18 inches at idle
Warm Idle Manual Trans 575-600 RPM
Warm Idle Auto Trans 475-500 RPM
Carburetor CFM
Bore and stroke 4.00 X 3.0028
Compression 9.5:1 (155 – 199 psi @ cranking speed), 9.0:1 5.0L
Compression Pressure 130-170 @ cranking speed
HP and Torque 210 or 225 (HO) hp at 4400 RPM and 158 ft/lbs torque at 2400 RPM
Taxable HP 51.2
Distributor Rotation Counter Clockwise
Firing order Non H.O.’s = 1 – 5 – 4 – 2 – 6 – 3 – 7 – 8

Engine Torque Specifications

All torque specifications provided in this table are those recommended by FORD. If you use special bolts, follow the torque specifications provided by the manufacturer. I recommend that you use the 3 step torque technique where you torque down the bolts in three equal steps. Once you have reached the maximum recommended torque setting, go around one more time. Do not torque in a circular pattern. Always torque cross to cross.

Head bolts 55-70
Crank cap bolts 60-70
Rod end caps 24
Intake bolts 24
Exhaust manifold bolts 24
Upper intake on EFI 12-18
Harmonic damper 85
A/C Compressor mounts
Engine fan 16
Motor mounts to engine 85
Bellhousing bolts
Trans to bellhousing 25
Flywheel to Crankshaft 80
Oil Drain Plug 20
Oil intake to oil pump 12
Crankshaft pulley bolts 45
Thermactor Pump bracket 20
Thermactor Pivot bolt 30
Oil pan bolts 5/16 12
Oil pan bolts 1/4 8
Carburetor mount bolts 20
Oil pickup 10-15
Spark plugs
Oil pump mounting bolts 22-32
Trans. inspection plate
Water pump bolts 15-22
Clutch Pressure plate 35
Water Pump 20
Valve cover bolts 10
Rocker arm bolts 17-23
Camshaft thrust plate 12
EGR to Carburetor 16
Camshaft gear bolts 40
Alternator bolts 20
Alternator pivot bolt 50
Power Steering pulley to damper 45

Crankshaft Bearing Journal Specifications (302)

Main Bearing Journal (inches)

Journal Diameter 2.2482 – 2.2490
Oil Clearance
0.0005- 0.0024 Except #1 bearing which is 0.001- 0.0018
Shaft end play 0.004- 0.012
Thrust on number 3

Connecting Rod Journals

Journal Diameter 2.1228 – 2.1236
Oil Clearance 0.008 – 0.0026
Side clearance 0.003 – 0.010

Piston Ring Specifications (302)

Comp Ring Width

Top 0.077 – 0.078
Bottom 0.077 – 0.078

Ring side clearance

Top 0.002 – 0.004
Bottom 0.002 – 0.004
Oil ring Snug – 0.006

Ring gap width

Top 0.010 – 0.020
Bottom 0.010 – 0.020
Oil Ring 0.015 – 0.055

Piston Specifications

302
Code Red 3.9984 – 3.9990
Code Blue 3.9996 – 4.0002
0.003 Oversize 4.0008 – 4.0014
Piston to Cyl. Bore clearance 0.0018 – 0.0026
Piston Pin Bore Dia.

Valve Specifications

Year 1977
Seat angle 45
Face angle 44
Valve spring pressure lbs/inches 80 @ 1.690
Valve spring installed height (in) 1 11/16
Stem guide clearance (in) – Intake 0.0010 – 0.0027
Stem guide clearance (in) – Exhaust 0.0015 – 0.0032
Stem Diameter (in) – Intake 0.3416 – 0.3423
Stem Diameter (in) – Exhaust 0.3411 – 0.3418

Tune Up Specs

Year
Spark Plug
Plug Gap
Dwell
Point Gap
Intake
Exhaust
Carburetor Motorcraft 2150 2bbl or 5200 2V
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