I have a question maybe you guys can help me with. I have a chance to purchase a cam for my 95 Z28. The owner says that the dowel pin needs to be redrilled in the cam. Has anyone ever had to have this done before? During our conversation he said that the opti runs mostly off the three bolts anyway-is this true?Does anyone no where I can get the spec's for it, it's a CC306. All help is appreciated,Mike

 

why would you have to redrill the cam dowel pin?the only thing i can figure is it is for a 94 NON vented opti and he wants you to replace the dowel. personaly i would by the one for my car with the right pin. but thats just my .02

 

The differences in pins is the length. The vented optispark cams ('95+) use a longer dowl pin to drive the opti. Installing a longer pin is not a problem, although make sure that it is at the proper depth and not pushing on the optispark when installed.

I've also heard of some folks having to drill the front of the cam to get the opti's center locating dowel to seat right. I thought they would all accept the newer optis, but if not, a machine shop could do this no problem.

 

Becareful the cam dowel pin isnt too long. That happened to me once and it tore up my opti.

 

Anyone happen to know the correct lenght for the pin?

 

This was posted not too long ago by SkarodoM about dowel pin length:


Remember that you need the large hole in the center, front of the cam as well for the 95+ opti.

 

Aye.. if I recall correctly those are right

 

Thanks Captain....should I just tell my machine shop that length when I have them drill my cam out for the shaft on the opticrap? Thanks, Luke

 

That is dowel pin length, not the depth of the hole in the center of the cam. Don't know the dimensions of the hole.

 

I guess by number of reply's I'll get the cam. The owner is going the send me some pic's to check out. Really appreciate the help

 

I had mine drilled out today, the machinist said he would just give it enough room to slide in, which I am sure it will be fine, it just sits in there, doesnt turn the cam...

 

I would find out what the exact dimensions of the hole are. At 6K if the hole is a little to big, might wobble some. Maybe a cam company will tell you.

 

thats what the machinist said, that is why he is just gonna make it slightly oversize...

 

The center hole in late cams is .500X1.0625
The gm# for the late dowel pin is 10206039
93-94 dowel pin .320
95-97 dowel pin .685
This is from gm blue prints.

 

Thanks a bunch...