Modern Masters on Instagram: "⚠️ M278 TIMING CHAIN TENSIONER FAILURE ⚠️ Another Mercedes M278 4.7L Bi-Turbo in the shop with the classic cold-start rattle — and this one was caught just in time before it turned into a full timing disaster. These hydraulic tensioners are a known weak point on this platform. Once they wear out, you’ll hear that tell-tale chain slap on startup, followed by timing correlation codes and eventually stretched chains or broken guides if ignored. At Modern Masters Auto,
0:20
Modern Masters on Instagram: "⚠️ M278 TIMING CHAIN TENSIONER FAILURE ⚠️ Another Mercedes M278 4.7L Bi-Turbo in the shop with the classic cold-start rattle — and this one was caught just in time before it turned into a full timing disaster. These hydraulic tensioners are a known weak point on this platform. Once they wear out, you’ll hear that tell-tale chain slap on startup, followed by timing correlation codes and eventually stretched chains or broken guides if ignored. At Modern Masters Auto,
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