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Old 08-08-2021, 10:28 PM   #6
billr
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Default Re: 2001 SC2 Slow Crank After Rebuild

The compression test will tell you if the compression is abnormally high, and that is the cause of slow cranking; nothing to do with the starter system. Taking compression is so easy to do on these engines, you should get that out of the way, before fussing with anything else.

If compression is way high, it won't be from new rings or valve operation. Any problem with either of those will show up as lower compression, not higher. Has the head surface been shaved a lot? If not, the mostly cause of too-high compression is all that oil you dumped into the cylinders.
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