My Willys 3A and 3B Community
3A, 3B, DJ Technical Knowledge Base => "Original"-- Technical Questions, Answers, Observations => Topic started by: GAJeeper on December 03, 2012, 11:39:41 PM
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I never was good at math. I didn't think I would ever name a jeep but I am already getting pretty attached to this one! The jeep that brought me to the CJ3A page is a 1951 model with serial # 451-GB1 48046. The engine is marked 4LR125163A on the flat near the water pump. The casting # on the block is 804380-W-13-D-P5 CU-CR. From what I have been able to figure out the engine is a replacement model. It has the super sonic head on it. That is all I know about the engine. If anyone can offer any additional information I would appreciate it.
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Sounds like you pretty much have it handled numberwise...4LR is definitely a 4 cylinder L head Replacement engine. �The casting number I will have to leave to the experts... I looked up your serial number on a chart on Brian's Military Jeeps and you have the year correct, looks like it was later in the 51 model year when it rolled off the line.