Lexus GX 470: Ticking from the engine on cold start that fades as it warms

Checks, in order

1. Locate it cold
   Run a hose from your ear along each manifold-to-head joint on a cold engine. Soot streaks at the flange or a visible crack near the collector confirm it.
   easy $ · under about $50
2. Rule out the engine
   A tick that does not change with temperature can be a lifter or a loose plug. Check plug torque on that bank.
   medium $ · under about $50
3. Manifold or headers
   OEM manifolds run about $225 a side plus gaskets and hardware; owners report about $2,000 installed for both sides at a shop, and header installs quoted at around $1,450 labor. Replace all studs and nuts while it is apart.
   hard $$$ · shop-level job, $500+

Applies to: Lexus GX 470, 2003 to 2009, with the 4.7L 2UZ-FE V8 (timing belt) and the A750F 5-speed automatic. Every US GX 470 has rear air suspension; KDSS was optional from 2004. It shares its chassis with the 4th gen 4Runner and 120 Series Prado, so many 4Runner parts and procedures apply.

Tools and parts for these checks

Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.

The same problem on other Toyotas

• 4th Gen 4Runner (2003–2009): Ticking or diesel-like noise on cold start
• 2nd Gen Tundra (2007–2021): Ticking from the engine on cold start that fades as it warms up

Other engine problems on the Lexus GX 470

• Timing belt due or history unknown, coolant weep at the front of the engine

More Lexus GX 470 problems

• Rear end sags overnight or leans, compressor runs long or never, suspension warning light (Steering & Suspension)
• Rust on the frame, or play and a torn boot at the lower ball joints (Frame & Body)
• VSC TRAC and VSC OFF lights on, with or without a check engine light (Body & Electrical)
• Dashboard cracked, sticky or shiny and soft in the heat (Body & Electrical)
• Rear swing-out door will not open from outside or inside, or will not latch (Body & Electrical)
• Check engine light with P0171 and P0174 (both banks lean) (Fuel & Ignition)

All 11 Lexus GX 470 symptoms in the interactive troubleshooter →

General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.