Record Keeping Record Engine Serial Number Record all of the numbers and letters found on your engine serial number plate in the spaces provided below. This information is very important for repair parts or warranty information. RG11949 –UN–07NOV01 Engine Serial Number (B) Saran Engine Serial Number Plate Engine Model Number (C) Coefficient of Absorption Value (D) (Saran Engines Only) RG11948 –UN–06NOV01 Torreon Engine Serial Number Plate RG,RG34710,5507 –19–10NOV01–1/1 01-2 021604 PN=12