Checks, in order
- Check the oil level and dipstickLook for a low level and wet streaks on the dipstick tube. A quart low or more tells you the leak is real and not just residue.easy $ · under about $50
- Degrease and re-inspectSpray the front of the engine with degreaser, rinse, drive for a few days, then look again with a flashlight for fresh oil. The first place that turns wet is the source.easy $ · under about $50
- Valve coversLook along the valve cover edges on both banks and at the spark plug tubes. Oil in the plug wells points to a tube seal or gasket leak and can cause misfires.medium $$ · about $50 to $500
- Timing chain cover and seamsLook at the cover, especially around the water pump and crank seal area, for oil tracking down the front. Reseal is a larger job because of the chain, so get a firm diagnosis first.hard $$$ · shop-level job, $500+
- Oil pan and drain plugCheck the pan gasket, drain plug washer and filter seal. These are cheap to fix and easy to rule in or out.easy $ · under about $50
Applies to: 5th generation 4Runner, 2010 to 2024, with the 1GR-FE 4.0L V6 and the 5-speed automatic. Assumes the stock configuration; trim-specific items (KDSS, sunroof, A/C) are noted where they 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.
| ITEM | USED FOR | BUY |
|---|---|---|
| UV leak detection kit | Pinpointing exactly where a leak starts | Shop on Amazon |
| Engine degreaser | Cleaning the area so the leak shows up | Shop on Amazon |
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
Go deeper
More 5th Gen 4Runner problems
- Rust on the frame, flaking, or holes in the frame rails (Frame & Body)
- KDSS warning, fluid leak, or clunking and uneven ride on a KDSS truck (Steering & Suspension)
- Rough idle, shaking, or misfire with a flashing check engine light (Fuel & Ignition)
- Check engine light with P0171 or P0174, system too lean (Fuel & Ignition)
- Check engine light with P0420 or P0430, catalyst efficiency (Emissions)
- Temperature gauge climbing, coolant loss, or overheating (Cooling)
All 16 5th Gen 4Runner 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.