I'm installing a new GM Opti on my 1996 Z28. As recommended, I plan to remove the Opti cap to add some threadlocker to the rotor hold-down bolts.
What size are those little fasteners that hold the cap to the Opti housing?
3 mm?

 

they are external torx sockets. E4 is the size.

 

Exactly what I needed...Thank you very much!

 

If you find a set of torx sockets that small, post up where you find them, if you don't mind. I've looked in a few places and had no luck, but never knew the exact size.

 

Here it is:

http://www.etoolcart.com/index.asp?P...OD&ProdID=8133

 

by the way, you will need an e4 DEEP socket since the normal one wont make it to the recessed bolts on the opti.

 

Here is my super custom made optispark removal tool for the cost of bubble gum. The whole thing cost 85 cents from Ace hardware. Sure beats $25.00+ for socket sets you will never use on anything else.

Torx head screw $0.50
Wing nut $0.25
Jam nut $0.10
Opti cap removed in 60 seconds. Priceless

I just jammed the nut and the wing nut together with some locktite and ground the torx head down a tad to fit in the recessed areas of the cap.

The thing worked perfectly to remove those retarded inverse torx headed 3.5mm screws. Plus you dont have to damage the threads on you TB cover screws.

 

Gracias.