Rebuild Optispark (possible?)
Thread Starter
Racer
Joined: May 2012
Posts: 392
Likes: 19
Rebuild Optispark (possible?)
I have an extra Optispark that I want to rebuild. It's for a 93 LT1 and I was wondering if anyone knows where I can purchase the O ring, bearing and dist cap gasket. I have a new cap/rotor and this one is vented. Thanks Guys........Any help is appreciated.....
Race Director
Joined: Oct 2011
Posts: 16,086
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
You can, but not worth rebuilding it if the sensor in it is bad. Not sure where you could get those parts, but I would ask any company that sales optis.
Race Director
Joined: Oct 2005
Posts: 11,770
Likes: 175
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Probably somewhere like McMaster Carr or MSC to name a few. Just buy them as a generic part. If the cap gasket is paper just make one out of gasket material. For the bearing I would stick with SK or Timkin.
Advanced
Joined: Jul 2013
Posts: 87
Likes: 13
From: Tampa Bay area Florida
You can check the Opti for electrical operation as follows: Unplug the cable going to the Opti in the engine. Plug it into the Opti to test. Have someone watch the tachometer with the ignition on while you spin the Opti shaft counterclockwise. If the electronics, including the sensor, is working the tach needle will rise up according to how fast the shaft is spun. I assume that electronic display tachs will do similarly. Probably a good idea to pull the injector fuse(s) first.
Last edited by GaryDoug; Jan 15, 2017 at 10:11 PM.
2nd Gear
Joined: Dec 2020
Posts: 2
Likes: 0
Late to this party, but wanted to ask if anyone did in fact try out the sac city opti? Now years later how's it going?
I've used ACDelco for my first 2 replacements. Just rolled over 200,000 miles and its time for another.
I've used ACDelco for my first 2 replacements. Just rolled over 200,000 miles and its time for another.
Instructor
Joined: Oct 2017
Posts: 199
Likes: 24
From: Palmetto FL
Ihave a saccity opti for 3 yrs now in my '95, after having 2 AC Delco units fail in 18 months. Very happy with saccity, easy to email/call with questions.
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Burning Brakes
Joined: Jun 2007
Posts: 765
Likes: 49
From: West Palm Beach,Florida
If anyone is looking for Mitsubishi sensor,go to a junkyard. There are plenty of low mile Optis there with low miles. You just need a new cap and rotor. IF ANYONE WOULD ANSWER THE QUESTION ,I was also wondering where to buy the gaskets
2nd Gear
Joined: Dec 2020
Posts: 2
Likes: 0
Safety Car
Joined: Mar 2017
Posts: 4,194
Likes: 1,317
From: LeClaire Iowa
Look up optidoctor on here or ebay. He rebuilds these as a business and has all the parts and gaskets. Dan