Regularly check valve clearance so valves don't become too tight on Toyota RAV4

It is important to regularly check the valve clearance as the exhaust valves may become too tight. This will lead to valve failures which are expensive to repair.
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Average mileage: 234,000 (234,000–234,000)
Engine affected: 2.0L 4 Cylinder
3 model years affected: 1996, 1997, 2002
3 people reported this problem
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2002 Toyota RAV4 - 2.0L 4 Cylinder 234,000 mi,
I kept getting a misfire on the first cylinder (P0301) and changed the spark plugs, fuel injectors, checked compression, cleaned air intake sensor... all to no avail. Checked the valve and they were all a bit tight, but especially the first exhaust valve on cylinder 1 (it was at 0.04 and it's recommended to be 0.3-0.4). Guess it's off to the machinist to have them take a look at it. Anyone else been able to get this problem fixed?