Timing chain and tensioner replacement cost: shop vs. mobile mechanic

Timing chain and tensioner replacement: estimated U.S. average labor cost at a repair shop and with a mobile mechanic. Labor only; parts not included. Estimates, not quotes.

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What the estimate covers

Labor to replace the timing chain(s), tensioner(s) and guides only; the timing kit, gaskets, seals and fluids are extra. Inline 4-cylinder engines are usually at the low end; V6/V8 engines with several chains, or engines that must come out of the car, take longer. If the chain already jumped or broke, valve or engine damage can make the repair much bigger: get a diagnosis first.

Labor hours used: 4–10 h, our own editorial estimate (not taken from a licensed labor guide).

Problem pages that use this estimate

Sourced owner-reported problems on Mechanic Notes where this is the usual repair:

• 2010 Chevrolet Traverse: Timing chain code issue
• 2010 Dodge Charger: Timing chain tensioner failure
• 2012 Chevrolet Malibu: Timing chain tensioner failure
• 2018 Nissan Pathfinder: Timing chain failing

How these estimates work

• Labor hours (Mechanic Notes estimate): each job has our own editorial "typical labor hours" range. Real times depend on the vehicle, engine and condition, and are not taken from any licensed labor guide.
• Shop labor rate (assumption): $100–$139/hour, the band where about half of surveyed U.S. general repair shops put their average labor rate (PartsTech / OEC U.S. General Auto Repair Shop Survey (about 700 shops, Sept 2025), as reported by Ratchet+Wrench), scaled by your area's mean wage for automotive service technicians divided by the U.S. mean ($27.13/h; BLS Occupational Employment and Wage Statistics, May 2025, SOC 49-3023; verify on bls.gov). States and metros without wage data use the next-wider area.
• Average shop cost = typical hours × estimated shop rate. The headline number uses the middle of both ranges (or a job’s stated typical hours, where the usual job sits near the low end); the range uses low hours × low rate to high hours × high rate. Rounded to $5.
• Average mobile mechanic cost = shop labor × 1.5 (mobile convenience premium: travel and convenience are built in). This is a default assumption, not a survey result.
• Parts are not included. Parts prices vary too much by vehicle and brand to estimate honestly here; price parts separately.

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Page last updated 2026-11-02.