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the only reason that this might need to be adjusted is if there was interior engine work done like a new cam or removed shims, if not, then the answer to your question is no.

The service manual for 1990 4A-FE Corolla recommends that the valve clearences be checked every 60,000 miles or 72 months. This is "Schedule B" for normal driving as opposed to "Schedule A" for more demanding use of the engine. The clearances are checked by removing the valve cover gasket and checking them with a feeler gage. The valves can be adjusted by using small circular shims.

It may be that in practice the valves hardly ever need adjusting. I think this is a remarkably durable engine.

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โˆ™ 2015-07-15 21:16:04
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Q: Does 4A-FE need valve clearance adjustment or not?
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