Timing Chain Replacement

Timing chain replacement for engines with a rattling or stretched chain, with guides and tensioner renewed as a set.

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Service Info

Typical Duration 8 hours

We confirm the chain, guides or tensioner are at fault, remove the timing cover, replace the chain, guides, tensioner and sprockets as a set, inspect the oil pump drive and variable valve timing actuators, then verify timing by hand and refill with fresh oil and a new filter before starting.

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Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Timing Chain Replacement

A timing chain does the same job as a timing belt, keeping the crankshaft and camshafts synchronised, but it runs inside the engine and is lubricated by engine oil. Chains were once considered lifetime components. On many modern engines they are not, and a stretched chain, worn guides or a failing tensioner produce a distinctive rattle, particularly on a cold start. Michanic replaces timing chains, renewing the guides and tensioner as a set rather than the chain alone.

Why Choose Our Mobile Timing Chain Replacement Services?

  1. Diagnosed Before Dismantling:
    A cold start rattle can be the chain, the tensioner, low oil pressure or a hydraulic lifter. The cause is established before an engine is opened.
  2. Guides and Tensioner Renewed:
    Chains stretch because the plastic guides wear and the tensioner can no longer take up slack. Replacing the chain alone leaves the cause in place.
  3. Oil Condition Addressed:
    Chain wear is strongly linked to neglected oil changes and blocked oil ways. Fresh oil and a new filter are part of doing this properly.
  4. Honest Scope:
    This is a major job. We tell you what it involves before starting rather than discovering it halfway.

Why We are the Best Choice for Timing Chain Replacement

  • Timing Verified by Hand:
    The engine is locked to its marks, reassembled, and rotated manually through full cycles before it is ever cranked.
  • Correct Parts:
    Chain kits differ between engine variants, sometimes within the same model. We confirm the variant rather than fitting a generic set.
  • Related Wear Checked:
    Sprockets, the oil pump drive and the variable valve timing actuators are inspected, since a worn chain rarely damages only itself.
  • Clear Reporting:
    You are told what was found inside the engine, including anything that affects how long the repair will last.

A stretched timing chain does not only rattle. As it lengthens, the camshaft timing retards relative to the crankshaft, which costs power and economy and eventually sets a correlation fault code. On engines with variable valve timing the effect is worse, because the system cannot achieve the positions it is commanding. If a guide breaks up or the chain jumps a tooth, the outcome matches a snapped timing belt: valves meet pistons and the engine is destroyed. A cold start rattle that lasts a few seconds is a warning worth acting on.

Frequently Asked Questions

  • Do timing chains need replacing?
    They were once treated as lifetime components, but on many modern engines they are a wear item. Stretch, worn plastic guides and failing tensioners are common, particularly where oil changes have been extended or neglected.
  • What does a worn timing chain sound like?
    A rattle from the front of the engine, loudest in the first seconds after a cold start before oil pressure reaches the tensioner. It often quietens once running, which is why it is easy to dismiss.
  • What happens if a timing chain breaks or jumps?
    The camshafts stop turning in time with the crankshaft, and on an interference engine the pistons strike the valves. The damage is the same as a snapped timing belt: bent valves, damaged pistons and often a cracked head.
  • Why do timing chains stretch?
    A chain does not stretch like elastic; its pins and rollers wear, which lengthens it overall. Wear accelerates sharply with dirty or degraded oil, so extended oil change intervals are the most common contributing factor.
  • Can just the chain be replaced without the guides?
    It is not advisable. The plastic guides and the tensioner wear alongside the chain and are what allowed the slack to develop. Fitting a new chain against worn guides brings the rattle back long before it should return.