P0016 on Chevrolet

The 3.6L direct-injected V6 used in fifth-generation Camaro is known for timing chain wear/stretch that can trigger cam/crank correlation faults, rough running, and reduced performance. GM issued service information and special coverage on related 3.6L timing chain concerns across multiple applications, and Camaro owners have documented the same issue in forums and complaints. Poor oil maintenance tends to accelerate wear because chain life is sensitive to lubrication quality and oil change intervals.

The 2.2L and 2.0L Ecotec engines in the Cobalt develop timing chain stretch and timing chain guide deterioration. The plastic timing chain guides wear over time, causing the chain to become slack and noisy. If left unaddressed, the timing chain can skip teeth, causing valve timing misalignment and potential engine damage. The issue typically develops between 80,000-150,000 miles. The water pump is driven by the timing chain on these engines, so both should be addressed together.

The water pump on the 3.6L V6 can fail, causing coolant leaks and potential overheating. The pump is driven by the timing chain, making replacement labor-intensive as it requires significant disassembly to access.

The 2.4L Ecotec engine is prone to premature timing chain failure due to improperly hardened chains and faulty tensioners. A defective batch of timing chains that were not hardened properly causes the chains to stretch prematurely. When the timing chain fails or jumps teeth on the sprockets, it can cause catastrophic valve damage and complete engine failure.

The 2.4L Ecotec in 2010-2017 Equinox is prone to premature timing-chain and balance-chain stretch, driven primarily by a collapsing chain tensioner and made worse by the engine's known oil-consumption problem (low oil reduces hydraulic pressure to the tensioner). Symptoms are a rattle at cold startup, a check-engine light, and rough running or loss of power. Because the engine is an interference design, a chain that skips timing far enough lets the valves contact the pistons, turning a maintenance item into an engine-destroying failure. GM issued Special Coverage Adjustment 12313D covering premature timing/balance chain wear on certain 2010-2011 2.4L engines.

The 2.2L and 2.4L Ecotec engines in the HHR suffer from timing chain tensioner failure and chain stretch, particularly on early production years. The timing chain tensioner does not receive sufficient oil at idle due to a design fault in early engines, causing accelerated wear. The 2.4L Ecotec is especially prone to this issue and also suffers from oil consumption problems. GM released revised tensioners and oil nozzles but many HHRs were never updated. Symptoms typically appear between 80,000-120,000 miles.

The 2.2L (L61/LE5) and 2.4L Ecotec four-cylinders are prone to timing chain wear caused by failing plastic guides and weak tensioners, often aggravated by extended oil-change intervals or low oil. Because the engine is an interference design, a stretched chain that jumps time can let pistons strike valves and destroy the engine. The telltale sign is a rattling or scraping noise from the passenger side of the engine, especially on cold start, frequently accompanied by code P0008/P0017 for cam-to-crank correlation.

The GM Ecotec 2.4L direct-injection engine suffers from timing chain stretch and plastic guide breakage. GM received a bad batch of chains that were not properly hardened. The plastic guides break causing the chain to sag, and since this is an interference engine, failure can destroy the engine. The 2.4L also burns oil excessively due to improperly hardened piston rings (2010-2013), leading to low oil which accelerates timing chain wear.

Timing chain tensioner fails allowing chain to slap and jump timing. 2.5L V6 particularly susceptible. Can cause valve damage if chain jumps more than one tooth.

The 2.5L Suzuki V6 engine has a hydraulic timing chain tensioner that leaks down overnight, causing a loud rattling noise on cold startup. If the tensioner fails completely, the timing chain can jump and cause valve-to-piston contact, bending valves and potentially destroying the engine.

The 3.6L V6 (LLT and LFX variants) in the first-generation Traverse is notorious for premature timing chain stretch. The engine uses three timing chains — one primary and two secondary chains driving the variable valve timing actuators. The chains stretch beyond the tensioner capacity, causing the engine timing to slip. Symptoms progress from a rattle on cold start to a check engine light with camshaft correlation codes. If ignored, the stretched chains can skip teeth, causing catastrophic engine damage. The issue typically manifests between 80,000-120,000 miles.