![]() ![]() This can be caused by the chain skipping position, or more commonly a stretched timing chain. ![]() Our inspection revealed the timing chain was stretched and as evident from the amount of sludge and varnishing, that this customer was pushing the mileage between oil changes. Experiencing problems like this regularly, our trained mechanic began a careful examination. The codes causing the check engine light included the p0008 code, engine camshaft position performance bank 1. Our auto mechanics performed a series of diagnostic tests which included a scan of the engine’s computer. This 2009 Cadillac CTS4 came in with the customer complaining of the check engine light on. This stretching is expedited when an owner refuses to do regular maintenance: the added resistance of the sludge varnishing from long intervals without an oil change add to the resistance that eventually stretches the chain. This causes various camshaft position performance problems, including P0008. Over time the stress of moving the engines valvetrain and the variable hydraulic camshaft adjusters stretches the metal of the chains. Unfortunately, even with the most diligent owners, they have regular issues with timing chains, needing replacement. This engine was used in the Cadillac CTS, STS, SRX, and various other GM vehicles like the GMC Acadia. The base model was equipped with a 3.6 Liter V6 gasoline engine dubbed the LY7. In 2008 Cadillac released the updated CTS model a successor to the first generation originally introduced in 2002. Today we look at an example of the later, that by doing regular full synthetic oil changes, could have possibly saved the potential headache associated with a costly Cadillac CTS4 timing chain repair. Is about an hour once every six months to much to ask when it comes to the reliability of your engine? The outcome of not changing your oil every 3,000 to 7,500 miles determines the difference between a $65 charge and a $3,000 engine replacement down the line. ![]()
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