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Plug inspection & compressions numbers cold vs warm

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Old Dec 28, 2024 | 01:43 PM
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Default Plug inspection & compressions numbers cold vs warm

Just pulled my plugs after buying my s2k. Can someone tell me how they look? Also ran a compression test when the motor was cold and all cylinders were about 220 psi (are these solid numbers) how much more inflated would these numbers be if the motor was warm?



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Old Dec 28, 2024 | 01:45 PM
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Old Dec 28, 2024 | 02:59 PM
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Look good,but put new ones in as are worn a little. If all are 220 thats ok,toque plugs correct NM
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Old Dec 29, 2024 | 05:57 AM
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Do a valve adjustment while the plugs are out. Max gap. Cold engine.(Easier to turn the engine over by hand with no compression.)

Find the current recommended torque for the sparkplugs as it's been increased since the original spec 20+ years ago. Set of genuine pre-gapped OEM plugs is cheap.

-- Chuck
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Old Dec 29, 2024 | 01:22 PM
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Warm will increase numbers by maybe 5% or so. That would put you into low 230's range. Which is excellent. Its more important they all match, vs actual numbers. Gauges vary, elevation matters, etc. Kinda like dyno numbers. Not something you would directly compare. More about in range and consistent.

You are definitely in range. 220 would be fine numbers even if that were done warm. Around 240 is max these engines typically read. So 230's is excellent (different gauge, different elevation, you might actually be up at max numbers).

Your numbers being all consistent is excellent. Your cylinders are very healthy!
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