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Valve bounce

1977 stock red 202 in Hx ute valve bounces at 4000 rpm any suggestions to stop this??

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My old VB commodore (red 202) did the same, valves bounced at roughly 4000 onwards. I guess the only thing you can do is fit harder (or double/triple) valve springs.

Cheers

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Sure its not your lifters leaking down ? There is no way it should valve bounce at 4k rpm.

Being an old VB you'd probably find your hydraulic lifters are starting wear out from age and multiple thrashings.

Check that first.

Cheers

Tony'

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Sounds like to much point gap.Try that first at .018"

Excess gap will make the points float sounds like valve bounce.

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