Question about Mazda MAZDA3
The service manual 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.
Posted on Dec 11, 2008
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Posted on Jan 02, 2017
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