S2000 Under The Hood S2000 Technical and Mechanical discussions.

valve lash & engine heat

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Old Jun 4, 2015 | 12:41 AM
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Default valve lash & engine heat

Does valve lash (clearance or play) become tighter or looser, as the engine heats up, in an S2000 engine?



Thanks!
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Old Jun 4, 2015 | 03:15 AM
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As the engine gets hot the valve clearances tend to close up as the parts heat.

That's why they're set cold (Honda specifies no more than 100°F) and the recommendation is to set at the top of the scale. For exhaust valves this is 0.011".

-- Chuck
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Old Jun 4, 2015 | 07:34 AM
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Thanks! Thought so. Just wanted to be sure.
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Old Jun 4, 2015 | 07:35 AM
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if you are trying to adjust valves hot, forget it. Just go get a big box fan for 16 bucks and set it on high on the head for like 30 mins.
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