1967 L-79 VALVE COVER CRACKS

[David K.]

Hello; I have noticed a few very fine, hairline cracks (not the known casting flaw) about a half inch long above a few of the letters on my L-79 valve covers. Are these normal after 40 years? Thanks in advance for any insight.

[Mark S. Lovejoy]

Re: 1967 L-79 VALVE COVER CRACKS

David,

Your description sounds pretty normal, cast aluminum will crack at the surface. However, evidence of oil seeping from any crack is a sure sign that the valve cover is no longer doing it's job and needs to be replaced.

Hope this helps,

Mark
27152

[Phil P.]

do not replace epoxy inside *NM*

[Patrick T.]

Re: 1967 L-79 VALVE COVER CRACKS

My guess is that the valve cover bolts were over tightened.