Removal
1. REMOVE NO. 1 ENGINE UNDER COVER (See page EM-26) 2. REMOVE EXHAUST PIPE ASSEMBLY for 2WD:(See page EX-2) for 4WD:(See page EX-8) 3. DRAIN ENGINE COOLANT (See page CO-6) 4. DRAIN ENGINE OIL (See page LU-4) 5. REMOVE NO. 2 MANIFOLD STAY (See page EM-39) 6. REMOVE NO. 2 EXHAUST MANIFOLD HEAT INSULATOR (See page EM-40) 7. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY LH (See page EM-40) 8. REMOVE ENGINE OIL COOLER

(a) Remove the bolt, 2 clamps, and 4 clips and disconnect the 2 water by-pass hoses.

(b) Remove the oil cooler union bolt, oil cooler assembly, and O-ring.
INSPECTION
1. INSPECT ENGINE OIL COOLER

(a) Check the engine oil cooler for damage or clogging.
If necessary, replace the oil cooler.
Test yourself
A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.