Since the correlation between the camshafts and crankshaft is closely monitored by the engine control module (ECM), a check engine light is usually the first indication of a timing chain issue. This results in the engines valves opening and closing at the wrong time. When a timing chain stretches, it affects the correlation between the camshafts and crankshaft. What Happens When Timing Chains Fail on the GM 3.6L?
GM compounded this issue on earlier models with the use of an oil life monitor that was calibrated to allow excessive mileage between oil changes. Over time this will cause excessive wear to the timing components, causing the timing chain to stretch in length and in some cases fail completely. This results in the timing chain system not being lubricated properly. Lack of regular engine oil maintenance causes engine oil to break down and degrade. While some of it can be blamed on the engine design, the number one cause of timing chain failure or stretch is from inadequate lubrication. There are several factors that can cause timing chain systems to fail. Why Do the GM 3.6L Engines Have Timing Chain Problems? Although vehicles after the 2012 model year may still have timing chain problems, it is much less common than years past. By the 2012 model year, GM had made several changes to help address the timing chain issues the 3.6L engine was having. The majority of the timing chain issues are with the LY7 and earlier versions of the LLT 3.6L engine. What 3.6L Engines Have Timing Chain Issues? Following the LY7 and LLT, several new versions have been released as GM continues to dial in and improve its most popular V6 engine. The LLT version debuted in the 2008 Cadillac STS and was used up to 2017 in the Chevrolet Traverse. The new engine was equipped with a direct fuel injection system, a higher 11.3:1 compression ratio and better fuel economy. Soon after the release of the LY7 3.6L, GM introduced an improved version of its 3.6L engine, the LLT.
#2008 CHEVY EQUINOX TIMING CHAIN RECALL CODE#
The original 3.6L was identified under the option code LY7 and featured a 10.2:1 compression ratio, dual overhead camshafts, and a variable valve timing system. GM's 3.6L engine debuted in the 2004 Cadillac CTS and it quickly became one of GM's most widely used V6 engines in cars, trucks, and SUVs. What is the History of GM's 3.6L High Feature V6 Engine?
0 kommentar(er)
