Rebuilding the 3.8L Buick EngineExplore further
2008-3-1u2002·u2002Buick introduced an updated version of the 231 that they called the '3800' in '88. It was used in all of the FWD cars except the LeSabre that still came with the old VIN 3 motor without a balance shaft. The 25531617/25522646 block castings had on-center bores and a balance shaft that was located in the valley above the cam.
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