Does the Lexus LX have a timing belt or chain?
The Lexus LX uses a timing chain, not a belt, across its current lineup. This applies to both the established LX 570 with a 5.7-liter V8 and the contemporary LX 600 with a 3.5-liter twin-turbo V6.
The timing chain approach is designed to last for the life of the engine with proper maintenance, reducing the need for routine belt replacements. In Lexus’ flagship SUV, the chain drives the camshafts and works alongside other timing-related components, making maintenance focus on chain-related wear rather than belt replacement.
Current LX powertrains and timing-chain configuration
Here's a concise look at the LX's two primary powertrains and their timing setup:
- LX 570 (2008–2021): 5.7-liter V8 (5.7L UR/1UR family). Timing chain.
- LX 600 (2022–present): 3.5-liter twin-turbo V6. Timing chain.
In both cases, the engines use a timing chain rather than a belt, aligning with Lexus' reliability-focused approach for a flagship SUV.
Maintenance implications for timing chains
Before diving into ownership considerations, here’s what to know about maintaining a chain-driven timing system in the LX:
- Durability: Timing chains are designed to last longer than timing belts, with robust chains, guides, and tensioners built for extended service life.
- Maintenance focus: Regular maintenance still matters, and service intervals may include inspection of the chain, tensioners, guides, and the water pump, especially at higher mileage.
- Symptoms of wear: A rattling or noisy chain on startup, poor engine timing, or unusual vibrations can indicate wear in the chain or tensioner assembly and should be checked by a technician.
- Warranty and coverage: Timing-chain issues may be addressed under powertrain warranties depending on mileage and service history.
Conclusion: For LX owners, the absence of a timing belt reduces the likelihood of belt-related replacements, but professional inspection at recommended service intervals is still important to keep the chain and its components in good condition.
Ownership and reliability considerations
Lexus has a strong track record for longevity, and the LX’s chain-driven design mirrors that philosophy. As with any high-mileage luxury SUV, staying current with manufacturer-recommended maintenance—oil, coolant, and periodic checks of the timing-system components—helps preserve reliability and performance over time.
Summary
In summary, the Lexus LX uses a timing chain in both its current generations (LX 570 and LX 600). This design minimizes belt-related maintenance while still requiring regular servicing of the chain-driven system and associated components. If you’re evaluating an LX, verify the model year and service history to understand the health of the timing-chain system and related parts.
