← Camry Toyota Camry repair manuals →
Autopapyrus · Toyota Camry 2.5 A25A-FKS (2018)
https://autopapyrus.com/guides/toyota/camry/timing-chain-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Toyota Camry 2.5 A25A-FKS (2018): Timing Chain Replacement

The A25A-FKS engine (2.5 L, gasoline, 8 valves per bank) uses a timing CHAIN, not a belt. The chain in the Camry XV70 is designed to last the life of the vehicle. Replace it only if it shows visible wear (rattling or clicking at startup), if it breaks, or after 200,000+ km (125,000+ mi) of heavy-duty use. The job requires complete disassembly of the upper part of the cylinder head, and removal of either the cylinder head or the oil pump (depending on the approach). It is not the hardest replacement in its class, but it demands precision and a good understanding of the valve timing layout.

Difficulty: Hard Time: 8-12 hours Steps: 16 Tools: Full set of wrenches and sockets (8-19 mm), torque wrench, pulley puller, flywheel holder, gasket sealant (Toyota 08826-00080 or equivalent), new gaskets and seals

Part

  • 🔩 Toyota timing chain 13506-28060 (OEM). Upper engine seal kit (valve cover gasket, camshaft seal)
There's a full repair manual for this car Every system, wiring diagrams and torque specs — not just this job. Haynes and 5 more. See manuals →

Step by step

16 steps
  1. Disconnect the negative battery terminal. Let the engine cool completely (at least 2 hours).
  2. Remove the front right wheel and the engine splash shield (undercover) for access.
  3. Remove the accessory drive belt (alternator, A/C compressor). Mark the direction or photograph the routing.
  4. Set the engine to the timing marks: - Rotate the crankshaft (by hand with a wrench on the pulley bolt, or with the starter) until piston No. 1 is at TDC. - The mark on the crankshaft pulley must line up with the mark on the timing cover (usually a pin or a line on the cover). - At the same time, the marks on the camshaft sprockets (intake and exhaust) must line up with the marks on the cylinder head bearing caps or the special locating pins.
  5. Remove the timing drive cover (upper and lower parts, usually 8-10 bolts).
  6. Release the chain tensioner. On the A25A-FKS the tensioner is on the exhaust side and is secured by 1-2 bolts. Remove the bolts and the tensioner will back off under spring force.
  7. Remove the chain guide (if it is removable) and the chain itself. Take out the old chain and make sure the sprockets (on the crankshaft and camshafts) are not damaged. NOTE: The sprockets are often NOT replaced, since replacing them sharply increases the cost of the job. If the sprocket teeth are not worn (no visible "hook" on the teeth), they can be reused.
  8. Clean the installation area for the new chain and wipe off old oil and dirt.
  9. Install the new chain, making sure the marks on the sprockets and cylinder head line up. The chain must tension smoothly, without misalignment.
  10. Reinstall the tensioner and tighten the bolts (check the torque in the A25A-FKS service manual. It is usually 15-25 N·m (11-18 lb-ft), but the exact value depends on the design).
  11. Check that the marks line up according to the valve timing diagram.
  12. Install the guide, the timing covers, and the gaskets (use fresh sealant on the valve cover gasket).
  13. Reinstall the accessory drive belt in reverse order and adjust the tension.
  14. Reinstall the splash shield and the wheel.
  15. Fill the oil to the proper level (if it was drained during the job).
  16. Start the engine and let it idle, listening for unusual noises. The first start may have a slight rattle, which is normal (the chain is settling). If the rattle does not go away within 10-20 seconds, stop the engine and recheck the marks.

Common mistakes and warnings

  • Timing chain replacement is a critical operation. Incorrect mark alignment leads to bent valves and a major engine overhaul. If you are not confident doing the job, take the car to a reputable Toyota service center or a cylinder head specialist. For exact torque specs, the timing mark layout, and chain wear tolerances, consult the service manual for the XV70 Camry 2.5 (look it up by VIN in the Toyota service catalog).
How it works · 3D How a Car Engine Works How the part you're working on actually works — in plain English, on a 3D model. Open in 3D →