<VV> ? Rocker Failure - Twice! ??

[Daniel Monasterio González]

IMO, it looks like lack of lubrication from the lifters to pushrods. I'd
remove valve cover, start engine and look for oil coming from the side
holes on pushrods.

Daniel

On 13/06/15 18:22, "Kent Goddard via VirtualVairs"
<virtualvairs at corvair.org> wrote:

>Looking for help! 
>Recently had my '66 140 rebuilt. Blew out #1 intake rocker arm at 500
>miles (see photos).  Today at 600 miles
>blew out #3 intake rocker in exact same fashion.  Appear to be overheated
>as both are somewhat
>gunmetal blue.  #3 exhaust has not failed
>but appears blue.  Others on R bank look
>OK.
>
> 
>
>A few other facts: New Clarks mated grooved ball repo
>rockers, new Clarks deep dimple lifters, reused pushrods (oil passages
>fully
>open), 270 cam, new PEP springs with 105# seating force (not 'bottoming
>out' at
>full lift), reworked heads (deep seats, milled to remove all but .010" of
>land, mag bronze valve guides, etc.).
>Brad Penn 30W break-in oil for 600 miles.  Just put in Brad Penn 10W-30
>today.  No loud tappet noises.  Not over-rev'ed.
>
> 
>
>I planned to drive the car to Knoxville next week but am now
>having serious doubts.
>
> 
>
>Has anyone seen or heard of anything like this before???
>
> 
>
>Many thanks.      
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