69mako

OK...I have my brandy new optispark to fit my "94" Vette from Chris

Just how are you supposed to index this thing to get it in the right firing order?....I don't see any special grove or tang on the shaft

TIA-Larry

bogus

it only goes on one way... if I remember rightly.

69mako

Thats what I thought...but I don't see any special index mark or keyway

ittlfly

As I recall, the dowel pin extending from the cam shaft through the timing cover is slotted so that it interfaces with the opti in only 1 way.

Alvin

just make sure you don't force it as people have done it in the past and ended up all screwed up..

99svrcpe

yep...make sure the flange on the opti mounts flat against the three mounting bolt holes. If there is any resistance then it's not properly engaged/aligned with the cam pin.

okies93

check out "my corvette pictures" for a visual. mine only went on one way and it went on real easy. took alittle while to get it clocked. it only goes on oneway. don't force it what ever you do. if it dont then turn the inards alittle and try it again.

oops my pics won't help any

Hotred94

Are you talking about a 94 opti or a conversion to make the 95 opti work? One uses the dowel pin and the other uses a splined shaft with a very small fill in one spline so it will only go on (correctly) one way.

BillWelter

If it's a '94 opti going in a '94 car, then the little splined shaft only goes in one way, there's one tooth missing on the shaft

69mako

THANK YOU!!!!
Thats what I was looking for

Alvin

It should go on only one way but people have forced it on the wrong way in the past. Thats what we where saying.