International Harvester 686 Engine
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| Engine options | |
| International Harvester 5.1L 6-cyl diesel | |
| International Harvester 4.8L 6-cyl gasoline |
| Engine Detail | |
| International Harvester D310 | |
| diesel | |
| 6-cylinder | |
| liquid-cooled | |
| German (Nuess) built diesel that replaced the 312 diesel in 1979. | |
| Displacement | 310 ci 5.1 L |
| Bore/Stroke | 3.875x4.375 inches 98 x 111 mm |
| Rated RPM | 2000 |
| Starter volts | 12 |
| Engine Detail | |
| International Harvester D-312 | |
| diesel | |
| 6-cylinder | |
| liquid-cooled | |
| Displacement | 312 ci 5.1 L |
| Bore/Stroke | 3.875x4.410 inches 98 x 112 mm |
| Air cleaner | dry |
| Rated RPM | 2000 |
| Idle RPM | 900-2000 |
| Oil capacity | 12 qts 11.4 L |
| Coolant capacity | 21 qts 19.9 L |
| Engine Detail | |
| International Harvester C291 | |
| gasoline | |
| 6-cylinder | |
| liquid-cooled | |
| Displacement | 291 ci 4.8 L |
| Bore/Stroke | 3.75x4.39 inches 95 x 112 mm |
| Rated RPM | 2000 |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on September 20, 2021 |