| Engine options | |
| Caterpillar 4.1L 4-cyl gasoline | |
| Caterpillar 3.6L 4-cyl gasoline |
| Engine Detail | |
| Caterpillar | |
| gasoline | |
| 4-cylinder | |
| liquid-cooled | |
| Original engine, used on the 5E version. | |
| Displacement | 251 ci 4.1 L |
| Bore/Stroke | 4.00x5.00 inches 102 x 127 mm |
| Air cleaner | oil bath |
| Rated RPM | 950 |
| Engine Detail | |
| Caterpillar 3400G | |
| gasoline | |
| 4-cylinder | |
| liquid-cooled | |
| The 3400G was used on the 4J and 6J versions, which were most R-2 tractors built. | |
| Displacement | 221 ci 3.6 L |
| Bore/Stroke | 3.75x5.00 inches 95 x 127 mm |
| Air cleaner | oil bath |
| Rated RPM | 1525 |
| Oil capacity | 12 qts 11.4 L |
| Coolant capacity | 28 qts 26.5 L |
| Caterpillar R2 Engine | |
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| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on July 1, 2022 |