Using SST and a hammer, tap in the oil seal until its surface is flush with the rear oil seal retainer edge.

While releasing the belt tension by turning the belt tensioner counterclockwise, and remove the V-ribbed belt from the belt tensioner.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE MECHANICAL

Install the V-ribbed belt.

Visually check the V-ribbed belt for excessive wear, frayed cords, etc.

If any defect has been found, replace the V-ribbed belt.

Remove the 11 clips and intake duct seal.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE MECHANICAL

Inspect the engine coolant .