Long time no MSC! hope you are all doing ace
When should valve springs be replaced (due to a reduction over time in their free-length )?.
...1mm short, 2mm short, 4mm short, 8mm short,16mm short....
or maybe
0.1% short, 0.2 %, 0.4%, 0.8%, 1.6%
What say you all valvetrain gurus ?
Cheers