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2026. 6. 30. 작업
Does a timing chain need maintenance?
While regular maintenance is not required, it is advisable to regularly check how much the chain has stretched, say every few 100K. If the chain stretches too much, the tensioner may no longer be able to perform its job. There's also the problem of the pins becoming a bit loose in the side plates. The chain should also get a visual check whenever the opportunity presents itself to ensure there is no evidence of things like side plates starting to become loose. Rollers should be felt to ensure there is no discernible play between roller and pin. Timing chains don't often break but when they do they generally take chunks of the engine with them, as well as allowing valves to get too friendly with the pistons, on most engines.
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Our 2000 Tacoma has 350,000 miles and has been very well-maintained. Never skipped an oil change or transmission service, even replaced the timing chain twice as preventive maintenance. On a recent service visit, the shop alerted us to the need for seals replacements, and we had been adding about a half-quart of oil between oil changes. We authorized the repair, along with new tires, alignment, tie rod, everything they said necessary to get the vehicle tip-top. We picked up the truck on a Friday and the following Sunday, I noticed a considerable amount of blue-white smoke puff from the tailpip
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