The vehicle was stationary. Starting the engine when cold produced a ticking noise. Went to the chevrolet dealer to ask about what the problem could be. He mentioned several things, one of which is exhaust manifold leaking. Sure enough, after checking the exhaust manifold a broken bolt was found allowing exhaust gas to leak out bypassing the emission catalytic convertor and exhaust system which would cause a fire hazard, as well as health and pollution concerns. I believe the exhaust manifold bolts are defective as there are many cases of this happening on many gm v-8 engines
Engine & cooling
Workhorse Class A Engine problems by year
1 complaints filed with NHTSA about the Workhorse Class A's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
Engine complaints by model year
| Year | Engine complaints | Crashes | Injuries | Recalls |
|---|---|---|---|---|
| 2006 | 1 | 0 | 0 | 0 |
Latest Class A engine complaints
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data