Cars With Fares does not accept timing-chain, internal-engine, head-gasket or lifter/camshaft repairs as a mobile service. This guide explains the failure and workshop repair considerations. Ask a suitably equipped repair shop to confirm the diagnosis, scope and written estimate. An enquiry does not book this repair or guarantee a referral appointment.
You start your Traverse, Acadia, Enclave, Equinox, Camaro, CTS or SRX on a cold morning and there's a rattle up front for a second or two, and now there's a check-engine light with a code like P0008 or P0017. The dealer quoted you somewhere around three to four-and-a-half grand. If it's the GM 3.6 V6, they've nailed it, this is one of the most common big jobs on these engines. Here's the real story.
Your engine is GM's 3.6L V6, the LLT, LFX or LGX depending on year, in a huge spread of vehicles: Traverse, Acadia, Enclave, Equinox, Impala, Malibu, Camaro, CTS, ATS, SRX and more. It's a capable engine. Its known weak spot is the timing chain system, especially the earlier LLT (roughly 2007–2014).
Straight numbers. The exact figure comes from your specific car and whether the phasers need doing, but here's the honest GTA range.
Dealer: typically $3,000–$4,500
That's all the chains, guides and tensioners, parts and labour, one number. What swings it: whether the cam phasers/VVT solenoids need replacing too, and the engine layout (transverse SUV vs. rear-drive car).
Faint cold rattle, clears fast, code just appeared: get it on the books in the next couple of weeks, it only gets worse and it's lowest-cost now. Rattle getting longer/louder, multiple correlation codes, reduced-power message: the timing's drifting badly, get it done soon, don't keep daily-driving it. Loud sustained rattle or it ran very rough/stalled: ease off it and let's look before a chain jumps, a flatbed is cheap next to valve damage.
It's GM's 3.6L V6 (the LLT, LFX and LGX), mostly the earlier LLT from roughly 2007–2014, across the Traverse, Acadia, Enclave, Equinox, Impala, Malibu, Camaro, CTS, ATS and SRX. If your 3.6 rattles on a cold start and has a cam-correlation code like P0008 or P0017, it's almost certainly the stretched chains. GM's earlier long oil-change intervals made it worse, so good oil habits help the new chains last.
They're engine-position / cam-to-crank correlation codes. They mean the camshaft timing has drifted out of sync with the crankshaft, which on a GM 3.6 is the stretched timing chains telling on themselves. P0008/P0009 are bank position codes and P0016–P0019 are cam-crank correlation. Combined with a cold-start rattle, they're the fingerprint of worn chains and guides. The fix is the full timing set, often with the cam phasers and VVT solenoids.
GM 3.6 rattling on cold start? Mobile engine repair · is your shop quote fair? · get a flat quote
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“Fares came by and did the brakes on my 2021 Lexus RX350. I got quoted way more at a shop so I decided to try a mobile mechanic instead. He showed up on time, did the work in my driveway, and everything went smoothly.”Google review, five stars, 2021 Lexus RX350
“Wonderful and quick experience, charged me way less than the dealer and he did the work in my driveway in the cold. I really appreciate all the hard work.”Google review, five stars
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