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Lost compression - after head change
#13
It occurs to me that a knock-on effect of changing from LC to HC head is a change of spark plugs. I know that you have fitted brand new ones but there is a small possibility that they are faulty. Do you have another set that can be borrowed and tried ?

Another thought is that the raised compression will give the starter motor more work to do, so if the battery is a little tired it may just not be cranking over quickly enough.

Beyond that, I would take a close look at anything that was removed/replaced or otherwise disturbed during the head swap operation.

Cheers, John.
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RE: Lost compression - after head change - by John Cornforth - 14-11-2019, 06:28 PM

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