A diesel engine was never available in this Volvo. Engine size remained the same throughout the years, with the only change being the addition of fuel injection on 1972 164E models. All 1973 through 1975 models came with fuel injection instead of carburetors. These long, heavy and smooth- running engines are well suited to cruising on the highway. Volvo pistons are available for engines that require rebuilding in a variety of sizes.
Pistons are available as a complete set.
For instance, a six-cylinder engine piston set includes one piston, one set of piston rings, one piston pin and retaining clips. The need to meet tougher emissions laws throughout the early 1970s was the main reason for changes to parts in the engine. The only exception to this rule is the 1975 164E, and the reason for this will be explained later. The fuel pump is located on the left side of the engine block. All 1969 through 1972 B-30A engines have a fuef filter that unscrews from the fuel pump.