How to tell if a worn timing belt actually needs replacing
Mechanics often recommend replacing worn timing belts immediately, but vehicle owners frequently debate whether the belt can safely run past its mileage limit. Delaying this $1,500 repair risks catastrophic engine failure if the belt snaps, yet changing it early may mean throwing away thousands of miles of remaining life.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
- This comes up 12.6× more often in r/MechanicAdvice than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Driving until the belt breaks, or paying for the expensive replacement recommended by a mechanic.Did this help you?
- 2Replacing them anyway because spark plugs are inexpensiveDid this help you?
- 3Leaving them in longer based on visual appearance or advice from friendsDid this help you?
- 4Leaving the worn flywheel in place and continuing to drive the vehicle if the starter pinion gear meshes properly.Did this help you?
- 5Getting a second opinion from another mechanicDid this help you?
- 6Risking a drain and fill service instead of immediate replacementDid this help you?
- 7Checking for simpler issues like motor or transmission mountsDid this help you?
- 8towing the vehicle to the workshop instead of driving itDid this help you?
- 9inspecting the auxiliary belt to gauge overall belt conditionDid this help you?
- 10Continuing to drive until failureDid this help you?
- 11Replacing only the damaged side or replacing both sides at onceDid this help you?
- 12inspecting for rubbing partsDid this help you?
- 13asking mechanics for adviceDid this help you?
- 14Replacing the belt tensioner preventatively during other major overhauls, or leaving it alone if it only moves a bit and does not make excessive noise.Did this help you?
- 15Replacing the timing belt and water pump early around 100,000 km or after 10 years instead of waiting for the manufacturer's 210,000 km limit.Did this help you?
- 16Replacing the belt and water pump based on age alone to be safe.Did this help you?
- 17Asking for advice on mechanic forumsDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“wanted to know should I start trying to get a flywheel replacement or is it good to go.”source ↗
“I took my 2012 Honda Civic into the shop because it was trying to rock/stall during driving.”source ↗
“They said it needs a new transmission because it’s never been serviced in its life so over time it can kill the transmission.”source ↗
“If you try to service it, it could be 50/50 and worsen the car due to what could be in the tank”source ↗
“It’d be about $5500. Thoughts?”source ↗
“My friend says that these are fine. I used them for 40,000 km. The manufacturer advises changing them at 60,000 km.”source ↗
“I haven't checked the timing belt, but the auxiliary belt seems to be in good condition, with no cracks or anything. Is it safe to drive? I have an appointment to replace the timing belt next week, or should I just tow it to the workshop? ( Is about 70km away )”source ↗
“Does the age mean I should replace it (along with the waterpump) or will she be sweet?”source ↗
“Mechanic says significant wear. $1500 fix. Is it actually doomed?”source ↗
“I did, but he insisted they are good for another 10-15k km. But my opinion was, I use ethanol and GPL, so I have to replace them sooner than recommended.”source ↗
“The noise is gone but I saw the tips of the flywheel teeth kinda worn and I was concerned if I need to start getting parts and plan together to replace it or just send it”source ↗
“2007 Honda accord. This is the drivers side front. Is this the CV axle joint? If so do you recommend replacing it? The car has 270,000 miles”source ↗
“Not having major issues related to belt, except that it makes a sound when starting the vehicle, goes away when vehicle warms up.”source ↗
“It has never been changed before. Almost 85,000 miles”source ↗
“An 8 year old belt? Change it, dont wait. Also the water pump.”source ↗
“I‘m definitely not feeling good with that 210k interval. You think a change after 10 years is already too late?”source ↗
“val is a joke when it's already showing wear like that”source ↗
“My old mk4 tensioner let go at 90k and the belt was only 6 years old, whole top end was toast.”source ↗
“I just noticed that my tensioner wobbles here. I have replaced the belt at least 3 times already but if anything is worth doing to keep up the longevity at this point I would rather just do it.”source ↗
Where this came up
People with this problem also raised
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