What people keep running into with timing chain
Complaints tagged timing chain, each raised by more than one person. One-off posts are not included.
5 recurring problems · 30 people · 4 forums we read
Raised more than once
Most people first.
- 12Did my timing belt slip or did I mess up the install?An engine that idles fine briefly before running rough, dying, or refusing to rev past 2,000 rpm points directly to valve timing misalignment from the recent replacement rather than a slipped belt. This prevents the car from running reliably despite new components, as incorrect timing creates unburned fuel issues, strong petrol smells, and misfires.
- 10Camshaft timing looks off by a tooth but engine ran fineCamshaft timing marks can look misaligned or off by a single tooth depending on the visual angle and chain link placement, leaving mechanics unsure whether to leave the setup alone or adjust it. This uncertainty makes it difficult to confirm if the phaser placement and chain alignment are correct without clear, multi-angle reference photos.
- 4How to learn car engine repairs like timing chains and flywheelsComplex car repairs require hands-on instruction and guidance from an experienced mechanic, which leads some people to offer to pay a professional to teach them in person. Without direct expert help, DIYers get stuck on unexpected mechanical damage like milled locating pins and flattened dowels, leaving them unsure whether parts need to be drilled out or professionally repaired.
- 2Why is my timing chain tensioner losing tension when hand cranking?Hydraulic tensioners rely on engine oil pressure to stay firm, so they naturally lose tension and slacken when the engine is only manually cranked without running oil pressure. This makes the tensioner pop in and out during manual rotation, which is a normal behavior rather than a mechanical failure as long as the timing marks remain aligned.
- 2Camshaft timing off by half a tooth after rotating engineAligning the camshaft and crankshaft marks perfectly is often undone when installing the tensioner and rotating the engine shifts the camshaft off by half a tooth. Over-tightening the crank bolt or catching the sprocket can also cause the crank and cam to jump timing. This leaves mechanics stuck, unsure if they must remove the harmonic balancer and belt to individually reset everything to top dead center.
Comes up alongside
Topics that keep appearing on the same problems — not topics with similar names.