Max Wedge aluminum rocker arms

[Brian Schlump <jsbs@xxxxxxxxxxxxx>]

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Is anyone else using Crane aluminum roller rocker arms on their 426 Max 
Wedge or clone engine?  I'm using the gold colored ones part #64792-1 
and I've had problems with 2 sets.  Exactly 1 year ago this weekend I 
was coming home from a car show and one lifter started making noise.  I 
tore down the engine and found that intake rocker #5 had shifted toward 
the exhaust rocker, and the aluminum portion was opening the valve 
rather than the roller.  The valve stem wore right into the aluminum.  I 
discovered that I messed up the assembly sequence, so I wrote it off as 
a learning experience and ordered a new set.  I assembled that set 
correctly, and figured that was the end of the problem.  Wrong!  Last 
night when I left a cruise-in, the valves started making noise and the 
engine was missing while driving home.  I just tore it down again and 
this time both #1 and #3 intake rockers had shifted toward the exhaust 
rockers.  In addition the snap ring came out of #3 hydraulic lifter, but 
I was able to find all 3 broken pieces.  The engine hasn't been raced or 
driven over 70 mph either time, so I don't know why the rockers jumped 
out of place this time.  It has less than 2,000 miles on it since the 
repair last year.  I took the intake rockers from the last assembly I 
changed and made 1 good set from the two.  I also added 4 more round 
shims to the spacer spring between all 4 cylinders of that head in order 
to put more tension on the rockers.  Has anyone else had similar 
problems with these rockers?
Brian    

'64 Belvedere
Woodstock, IL.

"The difference between ordinary and extraordinary is that little 
extra."

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