[5] The intake and exhaust manifolds were integrated into the cylinder block casting to reduce both weight and cost; Nash drew attention to the increased reliability of the design by marketing it as "Monitor Sealed".

A triple-venturi, down-draft carburettor replaced the earlier type, and a number of minor changes to increase durability were also made.

Upping the stroke to 4 in (101.6 mm) bore in 1950 increased the displacement to 184.1 cu in (3.0 L; 3,016 cc) for the Nash Statesman.

The 195.6 cu in (3.2 L; 3,205 cc) model was produced from 1952 through 1965, initially as a flathead (L-head) side-valve, and later in an overhead valve (OHV) version.

[5] The new OHV configuration for 1956 continued with the water pump mounted on the left side of the engine (driven by a shaft extending from the back of the generator).

Featuring high-quality parts such as forged crankshafts and connecting rods, these engines earned a reputation for durability.

Modern head gaskets can extend this service interval to re-torque the bolts every 12,000 mi (19,000 km), or every other year.

The cast-iron liners in the aluminum block version can also shift if the head bolts are not properly torqued and the engine is allowed to overheat.