Question is valve spring New used or abused.
Is it a single or duel spring with dampener ?
what is you budget like ?
If old motor and you have some money pull both heads
have them checked. cheaper than a new motor.
Have new springs , retainer and locks in staled NO USED JUNK.
spend money on new valves & guides, 5 angle valve job, A lot eraser
to fix know than learn to walk on water.
