John Deere 4020 Engine


John Deere 4020 tractor photo
1963 - 1972
New Generation Series
Row-Crop tractor
Series map:
4000
4020
4320
107.7hp
101.3hp
127.8hp
Engines overview
John Deere 6.6L 6-cyl diesel
John Deere 5.6L 6-cyl gasoline
John Deere 5.9L 6-cyl gasoline
John Deere 5.9L 6-cyl LP gas
Engine Detail
John Deere
diesel
6-cylinder 12-valve
liquid-cooled inline
Oil capacity on most 4020 diesels increased from 8 to 12 quarts starting with the 1969 model year, tractor serial number 201,000. High-crop diesel tractors retained the 8-quart capacity throughout the production run. Tractors fitted with after-market turbochargers, and early tractors with replacement oil pans, may also have the higher oil capacity.
Displacement404 ci
6.6 L
Bore/Stroke4.25x4.75 inches
108 x 121 mm
Compression16.5:1
Rated RPM2200
Idle RPM600-2500
Operating RPM1500-2200
Firing order1-5-3-6-2-4
Starter volts24
Coolant capacity24 qts
22.7 L
Intake valve clearance0.018 inches
0.457 mm
Exhaust valve clearance0.018 inches
0.457 mm
Engine Oil
4020 diesel engine oil chart
Early Oil capacity8 qts
7.6 L
Late Oil capacity12 qts
11.4 L
Engine Detail
John Deere
gasoline
6-cylinder 12-valve
liquid-cooled inline
Original gasoline and LP-gas engine, used through the 1965 model year.
Displacement340 ci
5.6 L
Bore/Stroke4.25x4.00 inches
108 x 102 mm
Compression7.5:1
Rated RPM2200
Idle RPM650-2500
Operating RPM1500-2200
Firing order1-5-3-6-2-4
Starter volts12
Coolant capacity24 qts
22.7 L
Sparkplug gap0.025 inches
0.635 mm
Point gap0.016 inches
0.406 mm
Intake valve clearance0.015 inches
0.381 mm
Exhaust valve clearance0.028 inches
0.711 mm
Engine Oil
4020 gasoline engine oil chart
Oil capacity9 qts
8.5 L
Engine Detail
John Deere
gasoline
6-cylinder 12-valve
liquid-cooled inline
The larger, 362 ci engine became available in 1966, replacing 340 ci engine.
Displacement362 ci
5.9 L
Bore/Stroke4.25x4.25 inches
108 x 108 mm
Compression7.5:1
Rated RPM2200
Firing order1-5-3-6-2-4
Starter volts12
Oil capacity8 qts
7.6 L
Coolant capacity24 qts
22.7 L
Engine Detail
John Deere
LP gas
6-cylinder 12-valve
liquid-cooled inline
Displacement362 ci
5.9 L
Bore/Stroke4.25x4.25 inches
108 x 108 mm
Compression9.0:1
Rated RPM2200
Firing order1-5-3-6-2-4
Starter volts12
Oil capacity8 qts
7.6 L
Coolant capacity24 qts
22.7 L
Page information
Contact: Peter Easterlund
Updated on June 25, 2022
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