Loctite those opti rotor screws
Thread Starter
Burning Brakes
Joined: Jan 2002
Posts: 1,228
Likes: 1
From: Dallas Texas
Loctite those opti rotor screws
This lovely unit came from Chandler Motorsports (ebay) and lasted 200 miles:
The second screw is hanging by a single thread. You can actually feel when the first screw comes out- the engine will loose power for a split second and then keep going. When the second screw loosens like this one has, or falls out, it will run like crap, backfire, or not start at all.
Unfortunately the GM units are not immune- this unit replaced a GM unit from a GM dealer that had the same problem, except the second screw sheared off at about 6500RPM.
The second screw is hanging by a single thread. You can actually feel when the first screw comes out- the engine will loose power for a split second and then keep going. When the second screw loosens like this one has, or falls out, it will run like crap, backfire, or not start at all.
Unfortunately the GM units are not immune- this unit replaced a GM unit from a GM dealer that had the same problem, except the second screw sheared off at about 6500RPM.
Last edited by ninetyfivevette; Jul 2, 2011 at 02:40 PM.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
Happened to me on a replacement Accel opti a few years back. Since then I do the loctite trick on any opti I work on or replace. I can't understand why the companies that make these aren't doing it. It's good-cheap insurance IMO
Pro
Joined: May 2002
Posts: 678
Likes: 2
From: Lengede
Received my Chandler unit two days ago and took it apart. It's a must on these units. The screws are as described pretty loose and it will only take a few miles before it happens as described above from ninetyfivevette.
While your at it, replace the plastic rivets.
While your at it, replace the plastic rivets.
Burning Brakes
Joined: Nov 2009
Posts: 828
Likes: 103
From: Olney MD
Optispark precautions
I just ordered an Optispark from Chandler. When it gets here I'll get out my Loctite and my teeny tiny screwdrivers and tighten the rotor.
I've already replaced the other ignition pieces in hopes that I wouldn't have to do the Opti replacement, but nothing helped.
Thanks to all the posters for sharing info on their experiences. Soon I hope to add my own.
Has anyone done the vent kit retrofit for the non vented distributor version? I have a 93 vert and I've read the article, but it looks like a lot of work!!
Paul
Happy Fourth of July!
I've already replaced the other ignition pieces in hopes that I wouldn't have to do the Opti replacement, but nothing helped.
Thanks to all the posters for sharing info on their experiences. Soon I hope to add my own.
Has anyone done the vent kit retrofit for the non vented distributor version? I have a 93 vert and I've read the article, but it looks like a lot of work!!
Paul
Happy Fourth of July!
Le Mans Master
Joined: Jul 2005
Posts: 5,193
Likes: 16
Corvette central sells a modded one with all the vent parts for 92,93 cars..$469.00....we'll see how mine goes..and yes I'm loctiting the screws..WTF is wrong with these companies that they can't do this..you would think by now that they would know about this..hell my GF knows about this!
