Timing mark shifting on harmonic balancer?

[TOG1937]

Possible stupid question alert:
If the timing mark and the crankshaft key-way are in one solid piece of steel how could the timing mark be off?
Please see pics.
Thanks!

 

[TOG1937]

Answer from the Yikes! OMG dept, see pics.

 

[melsg5]

Possible stupid question alert:
If the timing mark and the crankshaft key-way are in one solid piece of steel how could the timing mark be off?
Please see pics.
Thanks!
View attachment 7008View attachment 7009

Where did you find that?

 

[melsg5]

Answer from the Yikes! OMG dept, see pics.

View attachment 7010View attachment 7011View attachment 7012

You got lucky it didn't break up at high engine speed.

______________________________

 

[TOG1937]

The failed unit is off our new to us 1966 Catalina Convertible 389 YC code engine.
The new one is from Ames Performance Part #: PN687

 

[melsg5]

Picture on their web site shows an outer ring which should have a rubber layer bonding it to inner ring.

Ames Performance Engineering

Pontiac GTO, Lemans, Tempest, Firebird, Trans am, Bonneville, Grand Prix, Catalina, GTO Parts, restoration, reproduction parts, ram air, engine, hinges, bumpers, latches, switches, carburetor, brakes, weatherstrip, seals, chrome, hoods, emblems, sheet metal, GM Licensed

www.amesperf.com

 

[TOG1937]

Correct, the hub that is keyed to the crankshaft and the damper are two sep pieces and bolt together, 4 pcs total assy counting the supplied shim and re-use of the original pulley.