Analysis
NAICS 336310 is the 2022 national industry for motor vehicle gasoline engine and engine parts manufacturing, part of 33631 (Motor Vehicle Gasoline Engine and Engine Parts Manufacturing). Census lists 26 example activities under it in the official index.
Census lists 7 related activities that belong elsewhere, most often in 336320, 336350, 336390 and 336330. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.
Between 2018 and 2023 the number of establishments fell 11% and employment fell 3%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
County Business Patterns counts 696 US establishments in this code in 2023, employing 61,615 people at an average annual payroll of $69,898 per employee (52nd percentile of national industries). 43% of the establishments have fewer than five employees, which is close to the national mix.
Its index entries, the activities Census uses to assign businesses to this code, include assembly line rebuilding of automotive and truck gasoline…, bearings (e.g., camshaft, crankshaft, connecting rod)…, carburetors, all types, manufacturing and connecting rods, automotive and truck gasoline engine…, among 26 in all.
Its goods appear in 27 statistical lines of the US tariff schedule, mostly under headings 8407 (spark-ignition reciprocating or rotary internal combustion…), 8483 (transmission shafts (including camshafts and crankshafts)…) and 8413 (pumps for liquids, whether or not fitted with a measuring…). That link is how import data is matched to domestic producers, for example in trade-remedy cases.
Official definition
This industry comprises establishments primarily engaged in (1) manufacturing and/or rebuilding motor vehicle gasoline engines and engine parts and/or (2) manufacturing and/or rebuilding carburetors, pistons, piston rings, and engine valves, whether or not for vehicular use.
Illustrative Examples:
Carburetors, all types, manufacturing Crankshaft assemblies, automotive and truck gasoline engine, manufacturing Cylinder heads, automotive and truck gasoline engine, manufacturing Fuel injection systems and parts, automotive and truck gasoline engine, manufacturing Gasoline engines for hybrid automotive vehicles manufacturing Pistons and piston rings manufacturing Manifolds (i.e., intake and exhaust), automotive and truck gasoline engine, manufacturing Pumps (e.g., fuel, oil, water), mechanical, automotive and truck gasoline engine (except power steering), manufacturing Timing gears and chains, automotive and truck gasoline engine, manufacturing Valves, engine, intake and exhaust, manufacturing
Source: US Census Bureau, NAICS 2022 Manual.
Not this code if…
| The business mainly does | Use instead |
|---|---|
| Manufacturing wiring harnesses and other vehicular electrical and electronic equipment | 336320 Motor Vehicle Electrical and Electronic Equipment Manufacturing |
| Manufacturing transmission and power train equipment | 336350 Motor Vehicle Transmission and Power Train Parts Manufacturing |
| Manufacturing radiators | 336390 Other Motor Vehicle Parts Manufacturing |
| Manufacturing steering and suspension components | 336330 Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing |
| Manufacturing parts for machine repair and equipment parts (except electric) on a job or shop basis | 332710 Machine Shops |
| Manufacturing rubber and plastic belts and hoses without fittings | 326220 Rubber and Plastics Hoses and Belting Manufacturing |
| Manufacturing stationary and diesel engines | 333618 Other Engine Equipment Manufacturing |
Index entries (26)
- Assembly line rebuilding of automotive and truck gasoline engines
- Bearings (e.g., camshaft, crankshaft, connecting rod), automotive and truck gasoline engine, manufacturing
- Carburetors, all types, manufacturing
- Connecting rods, automotive and truck gasoline engine, manufacturing
- Crankshaft assemblies, automotive and truck gasoline engine, manufacturing
- Cylinder heads, automotive and truck gasoline engine, manufacturing
- Engine block assemblies, automotive and truck gasoline, manufacturing
- Engine intake and exhaust valves manufacturing
- Engines and parts (except diesel), automotive and truck, manufacturing
- Flywheels and ring gears, automotive and truck gasoline engine, manufacturing
- Fuel injection systems and parts, automotive and truck gasoline engine, manufacturing
- Fuel pumps, mechanical, automotive and truck gasoline engine, manufacturing
- Gasoline engine parts, mechanical, automotive and truck, manufacturing
- Gasoline engines for hybrid automotive vehicles manufacturing
- Gasoline engines, automotive and truck, manufacturing
- Governors for automotive gasoline engines manufacturing
- Internal combustion engines, automotive and truck gasoline, manufacturing
- Manifolds (i.e., intake and exhaust), automotive and truck gasoline engine, manufacturing
- Pistons and piston rings manufacturing
- Positive crankcase ventilation (PCV) valves, engine, manufacturing
- Pumps (e.g., fuel, oil, water), mechanical, automotive and truck gasoline engine (except power steering), manufacturing
- Rebuilding automotive and truck gasoline engines
- Rings, piston, manufacturing
- Rocker arms and parts, automotive and truck gasoline engine, manufacturing
- Timing gears and chains, automotive and truck gasoline engine, manufacturing
- Valves, engine, intake and exhaust, manufacturing