When Should timing chain guides be replaced?
between 80,000 and 120,000 miles
When does a timing chain need to be replaced? The timing chain normally needs to be replaced between 80,000 and 120,000 miles unless there is a specific problem. Issues with the chain are common in higher mileage vehicles.
How much does it cost to replace a timing chain guide?
Timing chain replacement can cost between $600 and $800 for a DIY repair, or between $1,600 and $1,800 with a mechanic. The cost is high due to the complicated nature of replacing this part. If you want to DIY a timing chain replacement, the parts will cost around $650.

What causes timing chain guides to break?
Failure to follow periodic engine oil and filter changes may adversely affect timing chain life. Old sludge-contaminated engine oil can lead to accelerated wear of the timing chain, guides and sprockets. This could result in chain breakage.
What are the signs of a timing chain going bad?
Signs of a Faulty Timing Chain

- Rattling Sound on Starting the Engine or Idling. A common finding in a vehicle with a bad timing chain is unusual rattling noise when the engine is started or when brakes are engaged.
- Misfiring Engine.
- Contaminated Engine Oil.
- Check Engine Light.
- Inability to Start the Engine.
Can you replace timing chain yourself?
You may find the need to replace your timing chain at some point; however with the right tools, a service manual and some mechanical know-how, you can do it yourself. Just be aware that this is a major job and can have serious consequences for your engine if done incorrectly.
Can you check a timing chain?
To accurately identify the amount of wear in a timing chain, begin by removing all of the spark plugs and the distributor cap. With a wrench on the harmonic balancer bolt, turn the crankshaft at least two complete revolutions backward of rotation to remove any slack from the timing chain.