So, that's the story of the "little engine that could." The 3.8L Buick may have come from humble roots, but it's considered to be one of the "most significant V6 pushrod engines ever designed." It's been selected as one of the "ten best engines in the world" by Wards three times and is the benchmark for others in the industry.. 1992 Buick Regal Custom. Oil pressure sensor location please 3.8L. The oil pressure sensor is located on the passenger side of the engine down behind the power steering pump. Best way to get to it is through the rear of the passenger side front wheel well. Turn the wheel all the way to the left. You will see it on the engine block behind the pump.
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A Buick V6 of the '60s built for car usage will have only 2 letters then 3 digits. Those engines can be decoded from the Reference section on this site. The assumption so far is that the engine dates from this period. The manifold casting number looks close to other Buick casting numbers of this time.. Buick 225 Engine Specifications and Blueprinting. General Specifications for the 198 and 225 Cubic Inch V-6. The following information has been directly complied from original Buick service manuals.. ENGINE DIMENSIONS AND FITS: Deck Height: 10.187: Rings, Piston, and Piston Pin Specifications: Piston Clearance Limits..Top Land.0265.